Technical guide for contractors Logavent HRV2 · 2017-05-31 · For hygiene reasons and comfort requirements, this must be increased. This can either be done through extensive window

Technical guide for contractors

Heat is our element

Heat recovery ventilation Edition 2015/12

Logavent HRV2...
HRV2-140HRV2-230HRV2-350

Contents

Contents

1 Basic principles . . . . . . . . . . . . . . . . . . . . . . . . . . 41.1 General basic principles of domestic

ventilation . . . . . . . . . . . . . . . . . . . . . . . . . 41.1.1 Purpose and use of domestic ventilation . 41.1.2 Humidity and mould . . . . . . . . . . . . . . . . . 41.1.3 Health and comfort . . . . . . . . . . . . . . . . . . 51.1.4 Energy savings . . . . . . . . . . . . . . . . . . . . . . 61.2 Domestic ventilation system with

centralised supply and extract air plus heat recovery . . . . . . . . . . . . . . . . . . . . . . . 7

2 System overview . . . . . . . . . . . . . . . . . . . . . . . . . 8

3 Ventilation device technical description . . . . . 103.1 Ventilation devices Logavent HRV2-... . . . 103.2 General conditions for trouble-free

operation . . . . . . . . . . . . . . . . . . . . . . . . . 103.3 Determined use . . . . . . . . . . . . . . . . . . . . 103.4 Equipment overview . . . . . . . . . . . . . . . . 113.5 Ventilation stages . . . . . . . . . . . . . . . . . . 133.6 Frost protection operation . . . . . . . . . . . 143.7 Integrated ventilation functions of the

ventilation device Logavent HRV2-... . . . . 153.7.1 Setting the ventilation stage in manual

operating mode . . . . . . . . . . . . . . . . . . . . 153.7.2 Setting the operating mode with weekly

programme . . . . . . . . . . . . . . . . . . . . . . . . 153.7.3 Setting on-demand operating mode

(with VOC-, Humidity or CO2 sensor) . . . 163.7.4 External control over digital input . . . . . . 173.7.5 Fireplace function . . . . . . . . . . . . . . . . . . 173.7.6 Operating mode summer, extract air . . . 173.7.7 Bypass operation . . . . . . . . . . . . . . . . . . . 183.7.8 Filter Reset . . . . . . . . . . . . . . . . . . . . . . . 183.8 Operation with combustion equipment . 183.8.1 Residential ventilation and balanced flue

combustion equipment . . . . . . . . . . . . . . 183.8.2 Domestic ventilation and open flue

combustion equipment . . . . . . . . . . . . . . 193.9 Device filter . . . . . . . . . . . . . . . . . . . . . . . 193.10 Drainage . . . . . . . . . . . . . . . . . . . . . . . . . 213.11 Installation accessories . . . . . . . . . . . . . . 213.12 Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . 243.13 Dimensions and specifications . . . . . . . . 273.14 Curves . . . . . . . . . . . . . . . . . . . . . . . . . . . 323.14.1 Curves, pressure increase/flow rate . . . 323.14.2 Electrical power consumption curve,

pressure increase and flow rate . . . . . . . 353.14.3 Sound values Logavent HRV2- ... . . . . . . 36

4 Accessories for connection and controls . . . . . 374.1 Radio remote control . . . . . . . . . . . . . . . . 374.1.1 Product details . . . . . . . . . . . . . . . . . . . . 374.1.2 Control elements and displays . . . . . . . . 374.1.3 Menu levels . . . . . . . . . . . . . . . . . . . . . . . 384.2 Humidity sensor HS and air quality

sensor VS . . . . . . . . . . . . . . . . . . . . . . . . 394.3 Control accessories (CA) . . . . . . . . . . . . . 404.3.1 Connecting the reheater bank . . . . . . . . . 404.3.2 Connecting the CO2 sensor . . . . . . . . . . . 424.4 CO2 sensor CS . . . . . . . . . . . . . . . . . . . . . 434.5 HRE electric heater bank ... . . . . . . . . . . . 444.6 DHW heater bank HRW125/160 . . . . . . . . 474.7 Connection set CK ... . . . . . . . . . . . . . . . . 504.8 Plug C125 (optional, only for HRV2-140) . 51

5 Main line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 525.1 General Information . . . . . . . . . . . . . . . . . 525.2 Thermal insulation of air pipework . . . . . 525.3 Ducts made from EPP . . . . . . . . . . . . . . . 535.3.1 EPP elbow 90 °/45 ° . . . . . . . . . . . . . . . . . 545.3.2 EPP pipe . . . . . . . . . . . . . . . . . . . . . . . . . 555.4 Outdoor air intake and exhaust air

discharge . . . . . . . . . . . . . . . . . . . . . . . . 565.4.1 Outdoor air and exhaust air element

without thermal bridges WGE125/160 . . 565.4.2 Roof outlet without thermal bridges

DDF160/1 . . . . . . . . . . . . . . . . . . . . . . . . 575.4.3 Wall outlet with no thermal bridge

WG160 ... . . . . . . . . . . . . . . . . . . . . . . . . 585.5 Absorbing duet SD... . . . . . . . . . . . . . . . . 59

6 Air distribution channel system . . . . . . . . . . . . 606.1 Distributor boxes . . . . . . . . . . . . . . . . . . . 626.1.1 VK160 – Distribution box . . . . . . . . . . . . . 636.1.2 VKD –Throttle element . . . . . . . . . . . . . . . 656.1.3 FKV140-1 – Connector FK140-VK160 . . . . 666.2 Round duct system . . . . . . . . . . . . . . . . . 676.2.1 RR75... – Round duct . . . . . . . . . . . . . . . . 676.2.2 RRU75-1 – Diverter round duct . . . . . . . . 696.2.3 RRD75 – Connector for round duct . . . . . 706.2.4 RRV75-2 – Double female connector

for round duct . . . . . . . . . . . . . . . . . . . . . 706.2.5 RRS75 – Closing cap for round duct . . . . 706.3 Flat ducting system . . . . . . . . . . . . . . . . . 716.3.1 FK140 – Plastic fllat duct for flooring . . . 716.3.2 FKB140-1 – Elbow 90 ° vertical . . . . . . . . 736.3.3 FKB140-2 – Elbow 90 ° horizontal . . . . . . 746.3.4 FKU140-1 – Diverter flat duct . . . . . . . . . 756.3.5 RRB75 – 90° adapter flat - round duct . . 766.3.6 FKV140-3 – Connector flat duct-fitting . . 776.3.7 FKV140-2 – Connector flat duct-flat duct 786.3.8 FKS140 – Closing cap for flat duct . . . . . 78

HRV2-... – 6 720 818 999 (2015/12)2

Contents

6.4 Floor/wall outlet with air grille AG/... . . . 796.4.1 Floor/wall outlet flat duct FKU140-2 . . . . 796.4.2 Floor/wall outlet round duct RRU75-2 . . . 796.4.3 Cover grille floor/wall outlet AG/W and

Design grille floor/wall outlet AG/E . . . . . . 806.4.4 Pressure drop . . . . . . . . . . . . . . . . . . . . . 806.4.5 Sound insulation . . . . . . . . . . . . . . . . . . . 806.5 Valves for installation in pipe

connectors DN125 . . . . . . . . . . . . . . . . . . 816.5.1 ZU125 – Supply valve Standard . . . . . . . 836.5.2 AV125 – Extract valve Standard . . . . . . . 846.5.3 SDE –Sound absorber element . . . . . . . . 856.5.4 Special valves . . . . . . . . . . . . . . . . . . . . . 866.5.5 AV125/K – Extract valve kitchen . . . . . . . 92

7 Regulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

8 General design information . . . . . . . . . . . . . . . 958.1 Hygiene requirements for ventilation

systems . . . . . . . . . . . . . . . . . . . . . . . . . . 958.1.1 Basic hygienic requirements . . . . . . . . . . 958.1.2 Ventilation appliances as hygiene

versions to DIN 4719 (H designation) . . . 958.1.3 Hygiene requirements according

to VDI 6022 . . . . . . . . . . . . . . . . . . . . . . . 958.2 Energy requirements for ventilation

systems . . . . . . . . . . . . . . . . . . . . . . . . . . 958.2.1 Basic energy requirements . . . . . . . . . . . 958.2.2 Ventilation appliances as EC versions

to DIN 4719 (E designation) . . . . . . . . . . 968.3 User orientation . . . . . . . . . . . . . . . . . . . 968.4 Application area of the ventilation system 968.5 Ventilation of windowless rooms . . . . . . 968.6 Connection of cooker hoods . . . . . . . . . . 968.7 Installation location and condensate

drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 968.8 Ventilation exceptions . . . . . . . . . . . . . . . 978.9 Air circuit . . . . . . . . . . . . . . . . . . . . . . . . . 988.10 Sizing air lines . . . . . . . . . . . . . . . . . . . . . 998.11 Pressure drop calculation . . . . . . . . . . . . 998.12 Sound insulation . . . . . . . . . . . . . . . . . . . 998.13 Overflow vents . . . . . . . . . . . . . . . . . . . 1008.14 Air lines and fire protection . . . . . . . . . 101

9 Appliance and system sizing . . . . . . . . . . . . . 1029.1 Total outdoor air flow rate . . . . . . . . . . 1029.2 Total outdoor air flow rate for nominal

ventilation . . . . . . . . . . . . . . . . . . . . . . . 1039.3 Total outdoor air flow rate for

calculation . . . . . . . . . . . . . . . . . . . . . . . 1039.4 Total flow rate through the ventilation

system . . . . . . . . . . . . . . . . . . . . . . . . . . 1039.5 Air flow rate through infiltration . . . . . . 1039.6 Splitting the air flow rate . . . . . . . . . . . 104

10 Sample design . . . . . . . . . . . . . . . . . . . . . . . . . 10510.1 Appliance siting and air distribution . . . 10710.2 Sizing the air volume – calculation of

volume air flow rate . . . . . . . . . . . . . . . .10710.3 Dimensions and layout of ducting . . . . 11010.3.1 Sizing of the air ducts . . . . . . . . . . . . . . 11010.3.2 Sizing the main ducts . . . . . . . . . . . . . . 11210.4 Floor plan with ventilation

installation . . . . . . . . . . . . . . . . . . . . . . .11310.5 Total pressure drop and selection of

residential ventilation units . . . . . . . . . .11510.6 Appliance details for the sample

design . . . . . . . . . . . . . . . . . . . . . . . . . . .115

11 Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11611.1 Copy template for sizing the flow

rates . . . . . . . . . . . . . . . . . . . . . . . . . . . .11611.2 Copy documents for pressure drop

calculation air duct . . . . . . . . . . . . . . . . .11811.3 Copy template for pressure drop

calculation main ducts . . . . . . . . . . . . . .11911.4 Fire safety class certificate B1 for

EPS interior construction of theventilation device . . . . . . . . . . . . . . . . . .120

11.5 List of abbreviations . . . . . . . . . . . . . . . 121

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122

HRV2-... – 6 720 818 999 (2015/12) 3

1 Basic principles

1 Basic principles

1.1 General basic principles of domestic ventilation

With the implementation of the Energy Savings Order EnEV [Germany] and a further reduction in transmission heat requirement thanks to improved thermal insulation, ventilation heat demand is becoming increasingly important for the energy balance of buildings. The air-tight construction also significantly reduces the ventilation heat demand. For buildings without technical venting devices, the DIN EN 13829 flow rate for building airtightness measured using the blower door test may only result in 3 air change-overs (ACHBD = 3 1/h) between interior and exterior at a differential Pressure of 50 Pa. If a domestic ventilation system has been built in, even when solely run as an exhaust air system, the blower door test reading should be 1.5 air change-overs (LwBD = 1.5 1/h).

Fig. 1 Conversion of the blower door air change

LwBD Air change, blower doorLwN Air change, naturalAn air change calculation using the blower door test in natural air conditions shows that a modern building only reaches a natural air change-over LwN = 0.15 1/h ( Figure 1). This means that the room volume is only changed once every 7 hours as a result of leaks.This natural air change-over is too low. For hygiene reasons and comfort requirements, this must be increased. This can either be done through extensive window ventilation or through ventilation devices. Manual window ventilation is inconvenient and in conditions where air change levels are low, runs the danger of mould build-up. Furthermore, the air change takes place in an uncontrolled manner and the energy that could be recovered from the used air is wasted. A central mechanical ventilation system offers a safe and convenient solution to this problem.

1.1.1 Purpose and use of domestic ventilationThe main aim of heat recovery ventilation is the protection of the building substance and the creation of a good ambient air quality. One important aspect of mechanical living space ventilation is the energy savings that can be made with controlled ventilation with heat recovery.

1.1.2 Humidity and mouldOne particular aspect requires attention, namely the correlation between ventilation and the level of humidity inside the residential unit. Looking at a household with 3 occupants shows where the sources of humidity are located and what level of humidity ingress can be expected.

Therefore, over 8 kg of moisture is released into the room air over the course of the day in a 3-person household. As the water absorption capacity of the air is dependent on temperature, low wall surface temperatures inevitably act as humidity regulators. This leads to surface damp in cold areas and in extreme cases, condensation from the moisture in the air. The maximum permissible humidity in the interior is therefore characterised by the humidity load and the structural properties of the building. Humidity and surface temperatures on the inside of exterior wall components determine the condensation or dew point of the air.

Air change-over is derived from the ratio between the flow rate of the ventilation unit V and the volume of the building to be heated V.

LwN (1/h)

LwBD (1/h)

0 1 2 3 4 5 6 7 8 9 10 110

0,2

0,4

0,6

0,8

6 720 618 325.01-1i

Sources of humidityDuration/number

Level of humidity

g/dayPersons, resting 24 h 960Persons, active 24 h 2430Pot plants 5 qty. 1200Domestic work (cooking, cleaning)

3 h 3000

Showering 15 min 650Total 8240

Table 1 Level of humidity in a household with 3 occupants

HRV2-... – 6 720 818 999 (2015/12)4

1 Basic principles

A relative air humidity of 65 % is considered an acceptable comfort level and is quickly and easily reached and exceeded in bathrooms and kitchens. Then, if the room temperature drops, the humidity increases.

Fig. 2 Risk of condensation through falling temperatures

A Light grey area: normal room air levelsB Grey area: condensation1 Dew point2 Air humidity content (dependent on volume)3 Mould formation Relative humidity TemperatureHowever, it is not the condensing point, at just over 13 °C, that is decisive, but the point at which mould fungus begins to form. It is especially important to be aware that mould already begins to grow with a material moisture content of 80 % to 85 %. This material moisture content corresponds to a relative humidity of 80 % to 85 % at a temperature of 16 °C.Therefore, the maximum saturation of air or condensation is not required for mould fungus to grow; instead, growth can be expected from a much earlier point onwards. Appropriate ventilation, which reduces the moisture content in the room air, provides an effective solution for combating mould.

1.1.3 Health and comfortThe heat balance of human being is based on the Oxidation of carbohydrates, fat and protein, which causes heat water evaporation and CO2 excretion. So for example, a person who engages in light physical activity creates a heat output of 200 W at a humidity production of 100 g of moisture and a CO2-excretion of 30 litres per hour.The maximum concentration of 0.1 percent by volume of CO2 in the air, which according to Pettenkofer, should not be exceeded for hygiene reasons, results in a minimum fresh air volume flow of 20 m³/h to 40 m³/h, depending on the person's activity. If a building is scarcely ventilated or not ventilated well enough, this hygiene limit is very easily reached.

Fig. 3 Increase of the CO2 concentration through a physically inactive person

1 No air change-over2 Air change = 0.5CO2 Carbon dioxide concentrationt Length of presence

Although a higher CO2 concentration has no health implications, it does generate the feeling of being surrounded by stale and stuffy air. Apart from feeling uncomfortable, the level of concentration also drops markedly. Apart from the loads generated by the occupants of living spaces, the emissions given off by construction materials and various items of the interior should be mentioned, which also make an adequate supply of fresh air a must.Continuous filtering of outdoor air by means of a domestic ventilation system leads to increased health and well-being. Where required, the mechanical outdoor air filter can be replaced by an efficient pollen filter.Filtering extract air protects the ventilation device and is a requirement for efficient operation of the ventilation device.

ϕ in %

ϑ in °C20 19 18 17 16 15 14 13

65

85

69 %73,2 %

77,7 %82,3 %

87,5 %92,8 %

100

6 720 618 325.02-2O

2

3 B

1

A

t in h0 2 4 6

0,10

0,03

0,2

0,3

CO2 in Vol./%

6 720 618 325.03-2O

2

1

HRV2-... – 6 720 818 999 (2015/12) 5

1 Basic principles

Finally, ventilation technology also has an impact on those suffering from allergies. For example, the number of dust mites can be limited and even reduced by means of an adequate air change. Various studies show that mite population is strongly inhibited in absolute room air humidity below 7 g water vapour per kg of dry air. American study groups estimate that approx. 80 % of asthma cases in children are related to sensitivity to mites. According to current reports, every third person in Germany already suffers from an allergy, and this number is increasing.

Fig. 4 Frequency of allergies

[1] Pollen[2] Mites[3] Animal epithelial cells[4] Mould fungus[5] OthersOutdoor air is constantly pre-heated and brought in with no draught or environmental pollution such as impurities and noise pollution. This can significantly improve the comfort level.

1.1.4 Energy savingsThe energy saving made by using domestic ventilation with heat recovery, which corresponds to EnEV targets, is bets demonstrated with an example calculation. The results in figure 5 are from calculations according to the EnEV for a detached house, carried out with a specific energy requirement of 42 kWh/(m2 · a) (energy saving house).

Fig. 5 Specific primary energy demand and energy saving

A Condensing heating systemB Condensing heating system with ventilation and

heat recoveryPE Energy savings

The energy savings as a result of ventilation with heat recovery are 21 % compared to a standard condensing heating system. In terms of figures, with considerably better manufacturer parameters and a lower heating requirement, even bigger savings are possible (over 30 %).The energy efficiency of a domestic ventilation system with heat recovery can also be assessed using the electrical efficiency ratio, which is comparable to the co-efficient of performance (COP) of a heat pump. Good ventilation units reach COPs of well over 20, which means that the recovered output is higher than the total electrical operating power by about a factor of 20.The energy allowance of the system is calculated according to the EnEV using either the DIN V 4701-10 or DIN 1946-6 calculation schemes. The heat energy demand of the building is reduced by the fixed air change rate. An integrated heat recovery system brings with it a further substantial reduction. The power consumption of the system is simultaneously balanced out. The system expenditure factor of energy value of a ventilation system is significantly improved for heating and DHW heating.

48 %

1 %8 %

18 %

25 %

6 720 618 325.04-2O

2

3

4 5

1

%

10

20

30

40

50

60

70

8070,71

56,10ΔPE

A B

6 720 618 325.05-2O

HRV2-... – 6 720 818 999 (2015/12)6

1 Basic principles

1.2 Domestic ventilation system with centralised supply and extract air plus heat recoveryWith centralised ventilation, the residential unit is fully ventilated from a central location, where a system for heat recovery is installed for the centrally combined air current to provide the best energy efficiency.What all ventilation systems for wet rooms and kitchens have in common is the process of extracting warm and humid air in exchange for fresh outside air (supply air) which is blown into the living room and bedrooms.Corridors and hallways act as overflow zones for supply air to the extract air rooms in this process. It is characteristic of centralised full ventilation that the system function inside the ventilation appliance requires two fans that enable heat recovery, e.g. via an air/air heat exchanger.Furthermore, a central system contains a duct system from the device to the sully and extract air rooms.The major benefit of centralised ventilation is the balanced combustion air supply in the entire residential unit and in the building. A uniform air flow pattern is achieved by dividing the residential unit into extract air rooms, overflow areas and rooms provided with air current. Odours and humidity occur in the extract air sections. For that reason, air is constantly extracted from these areas out of the building. The supply air rooms in the building are provided with the same amount of outdoor air as the quantity that has been extracted. This ensures that odour and noxious fumes as well as water vapour are continuously extracted without building up in ventilated zones. The air extracted from wet areas and the kitchen is heated to approx. 20 °C. The heat transfer from the extract air to the outdoor air enables a recirculation of up to 90 % and is used to preheat the cold outside air. This preheats the incoming outdoor air almost to room temperature. In any case, optional reheating ensures the required comfort level.The air overflow in hallways and corridors can be achieved either by slightly shortening doors or with flow ducts in walls or doors.

Fig. 6

EX Extract air area (bathroom, toilet, kitchen)AU Outdoor airFO Exit airSU Supply air area (living room, adult/chilvd's

bedroom)ÜS Overflow area (hallway, entrance)HWR Utility roomWC ToiletKÜ KitchenÜS Overcurrent under door gapDI Hallway, overflow currentWO Living spaceZI Room

6 720 816 821-56.1O

DI 14,25 m²

WC 5,02 m2

AB

KÜ 10,2 m2

AB

ÜS

AU

FO

WO 28,96 m2

ZUZI

12,12 m2 ZU

HWR 6,71 m²

AB EX EX EX

SU

SU

HRV2-... – 6 720 818 999 (2015/12) 7

2 System overview

2 System overview

Fig. 7 System house Buderus Logavent HRV2- ...

[1] FK140 - Plastic flat duct 20m/coil [2] Bracket FKH140 - Fixation flat duct at ground for duct [4] Double female connection FKV140-2 - Connector flat duct-flat duct for flat ducting [7] FKB140-1 - Elbow 90° vertical for flat ducting[8] FKB140-2 - Elbow 90° horizontal for flat ducting[9] FKU140-2 - Floor/wall outlet flat duct for flat ducting[10] FKU140-1 - Diverter DN125 flat duct for flat ducting[11] RR75... - Plastic round duct DN75[17] Deflection RRB75 - 90° adapter flat - round duct[19] VK160 - Distribution box [27] EPP - Sealment SEMA EPP[28] Sound absorber element SD ...[29] Wall outlet WG160/1 - Weather louvre plastic

6 720 811 371-58.1O

8

9

97

10

10

10

10

11717

1

1

8

11

27

19

28

29

24

8

HRV2-... – 6 720 818 999 (2015/12)8

2 System overview

Product types Item

Usage in duct

PageDesignationOutdoor

airSupply

airExtract

air Exit airHRV2-140/230/350 – Logavent 10Main lineHRE125/160 – Electrical reheater bank – – – 44HRW125/160 – Domestic hot water reheater bank – – – 47WG160/1 29 Weather louvre plastic – – 58WGE 125/160 – Outdoor-/exhaust air element

DN125/DN126 – – 56

DDF160/1 – Roof outlet – – 57SD... 28 Absording duet ... 59DEPP... 27 Channel pipe 53BEPP... – Pipe elbow 90 ° 53CEPP... – Channel connector 53Air distributionFK140 1 Plastic flat duct 20m/coil – – 71FKV140-1 – Connect flat duct-distribution box – – 66FKV140-2 4 Connector flat duct-flat duct – – 78FKV140-3 – Connector flat duct-fitting – – 77FKH140 2 Fixation flat duct at ground – – 71FKB140-1 7 Elbow 90° vertical – – 73FKB140-2 8 Elbow 90° horizontal – – 74FKU140-1 10 Diverter DN125 flat duct – – 75FKU140-2 9 Floor/wall outlet flat duct – – – 79FKS140 – Closing cap for flat duct – – 79RR75... 11 Plastic round duct DN75, 20/50m – – 67RRD75 – Set of seal and fixation – – 70RRV75 – Connect round duct-round duct – – 70RRU75-1 – Diverter DN125 round duct – – 69RRU75-2 – Floor/wall outlet round duct – – – 79RRS75 – Closing cap for round duct – – 70RRB75 17 90° adapter flat - round duct – – 76VK160 19 Distribution box – – 63VKD – Throttle element – – 65SDE – Sound absorber element – – – 85AG/... – Cover/Design grille floor/wall

outlet – – – 80

ZUV125 – Extract air poppet valve – – – 83AV125 – Extract valve Standard – – – 84DV125 – Valve design – – 88ZUW125 – Supply valve widethrow – – – 90AVD125 – Valve spin outlet – – – 91AV125/K – Extract valve kitchen – – – 92Table 2 Assembly of Logavent HRV2- ... ventilation system

HRV2-... – 6 720 818 999 (2015/12) 9

3 Ventilation device technical description


Fig. 8

3.1 Ventilation devices Logavent HRV2-...Logavent HRV2-140, HRV2-230 and HRV2-350 are highly efficient domestic ventilation devices with integrated cross countercurrent plate heat exchangers for extract air heat recovery. They are used for controlled ventilation of everything from buildings of varying insulation standards to passive houses.Varying device sizes (nominal volume currents) enable usage in flats, detached houses and the similar.The devices fulfil the requirements of DIN 4719 for “E”-identification ( page 95). They are also approved by the Deutsches Institut für Bautechnik [German Institute for Structural Engineering] (DIBt) and the Passivhaus Institut [Passive House Institute] (PHI).

3.2 General conditions for trouble-free operation

The use of this appliance as part of a system for controlled domestic ventilation saves energy, contributes to a comfortable room climate, increases living convenience and prevents humidity damage. To ensure trouble-free operation, the following general conditions must be met:• To guarantee a trouble-free, consistent and steady

flow, doors must have air gaps underneath or overflow grilles built in ( DIN 1946-6). These must not be sealed, as otherwise the function of the system is affected and there may be negative or positive pressure in rooms ( Chapter 8.13 from page 100).

• Extractor fans may not be linked with HRV2-... on the duct side. We recommend using recirculation hoods.Vented tumble driers must not be connected with HRV2-...on the duct side either.

3.3 Determined useOnly use these appliances in detached houses and single floor apartments or in buildings with comparable utilisation. All other use requires the manufacturer's prior consent.These systems can be installed in the boiler room, below the roof, or in the living area, utility room or kitchen. During operation, the ambient temperature must be above 12 °C. The relative humidity of the ambient air must not exceed 60 %. The devices may not be installed in rooms with permanent impact from direct steam. For unrestricted operation in winter, an electric pre-heating coil is mounted in the device in the factory. To protect the building material, permanent operation of the ventilation device is necessary.Any other application will be considered incorrect use. No liability for any losses resulting from such use is accepted.

During construction or renovation of a building, there is often a build up of dust. Therefore we recommend ensuring sufficient cover for the channel system and the device itself as well as not operating the device during the construction phase in order to avoid damage or contamination of system components.

Certificates HRV2-140 HRV2-230 HRV2-350Deutsches Institut für Bautechnik (DIBt)

Z-51.3-325 Z-51.3-326 Z-51.3-327

Passivhaus Institut (PHI)

Yes1) Yes1)

1) Unit suitable for passive houses

Yes1)

Table 3 Overview of certificates

6 720 816 821-45.1O

Never use this appliance to dry out buildings.

HRV2-... – 6 720 818 999 (2015/12)10


3.4 Equipment overview• Casing made from powder coated sheet steel with

fully insulated, interior construction, free from thermal bridges and made from EPS

• Energy-optimised cross countercurrent air / air heat exchanger made from aluminium

• Energy-efficient, low-noise supply and extract air blowers

• Panel for setting the air quantity in 4 steps• Temperature-regulated automatic bypass• Intelligent activation of the integrated electrical pre-

heating coil for frost protection• Filter G4 of filter class with filter monitoring (optional

pollen filter F7)• Integrated condensation catch pan with external

drain• Internal control device with wiring devices for

electrical connection• Data retention in case of power failure• Activation of electric or hydraulic heating coil with

room, supply and / or exit air control depending on air conditions between 10 °C and 30 °C (with accessories)

Figure 9 shows the function principle of the most important assemblies.

Fig. 9 Functional principle

[] Logavent HRV2-...[A] Outdoor air [B] Supply air [C] Extract air [D] Exit air [1] Thermostatically controlled domestic hot water

reheater bank (optional) or electric reheater bank (optional)

[2] Temperature sensor, extract air[3] Extract air fan[4] Outdoor air temperature sensor[5] Supply air fan[6] Summer bypass damper[7] Electric pre-heating coil (integrated)[8] Exit air temperature sensor[9] Countercurrent heat exchanger[10] Temperature sensor, supply air

Supply air connection from bottomOn ventilation unit HRV2-140, the supply air connection can be selected from the bottom (floor connection). This offers the advantage of being able to connect the duct for example in the attic / loft. For this reason, the supply air connection is closed with a cover on top of the device (accessory) ( page 51).

7

4253

Ι

1

A DCB

910 86 720 814 484-01.1O

6

HRV2-... – 6 720 818 999 (2015/12) 11


Device optionsThe device can be operated in two different ways:• Option A: outdoor air and exit air right ( Figure 10)• Variant B: outdoor air and exit air left ( Figure 11)This allows the device to be set more variably and ensures easy combustion air supply. The factory setting is option A. The devices can be converted to option B on site.

Fig. 10 Option A: air current in device

Fig. 11 Variant B: air current in device

Key to Fig. 10 and Fig. 11:Air inlet: exit air Air inlet: supply air Air inlet: extract air Air inlet: outdoor air Heating battery in fan casing

6 720 811 371-37.2O

6 720 811 371-38.2O

HRV2-... – 6 720 818 999 (2015/12)12


3.5 Ventilation stagesThe device has both a supply air and extract air fan, which can be operated in addition to level 0 in 4 stages:

Ventilation stage 0In ventilation stage 0the device's fans are switched off. No ventilation in operation. For protection against damp, the device can be left on this setting for a maximum of 4 hours.

Ventilation stage 1: Ventilation for damp proofingAt ventilation stage 1, there is a permanent low level air change. This is required to protect the building materials from mould under normal conditions where the user is regularly absent and if there is no laundry drying inside the building.

Ventilation stage 2: Reduced ventilationAt ventilation stage 2, air exchange guarantees protection of the building materials and fulfills minimum hygienic requirements under normal conditions where the user is sometimes absent.

Ventilation stage 3: Standard ventilationAt ventilation stage 3, air exchange is enabled in the presence of the user. The air change rate is adequate to cope with typical humidity loads, as may occur through cooking, showering or the drying of washing. When the users are present, ventilation stage 3 guarantees hygienic air ratios as well as building protection.The flow rate at ventilation level 3 corresponds to the design flow calculated in the system schematics according to DIN 1946-6.After commissioning, the device works at level 3 until it is manually changed, or until another stage is chosen, either via a time programme or on-demand mode.

Ventilation stage 4: Intensive ventilationAt ventilation stage 4 it is possible to cover a higher ventilation demand that may have occurred as a result of exceptional user activity (for example a party, intensive use of the kitchen or bathroom).Ventilation stage 4 can run for a maximum of 4 hours. Afterwards, the device automatically switched to stage 3.

Technical implementation of ventilation stagesTo ensure a balanced air volume, the device should be set to level 3, the design flow determined in the system schematics. The other ventilation stages are fixed values according to table 4 relative to ventilation stage 3.

Ventilation stage Designation Values1 Humidity control approx. 40 %2 Reduced ventilation approx. 70 %3 Nominal ventilation 100 %4 Intensive ventilation approx. 130 %Table 4

HRV2-... – 6 720 818 999 (2015/12) 13


3.6 Frost protection operationThe integrated electrical pre-heating coil is built in behind the exterior air temperature sensor in the flow direction. The condensate accumulated during the heat recovery process leads to ice formation in the heat exchanger at outside temperatures below freezing. The pre-heating coil is used exclusively to prevent ice formation in the heat exchanger.

If one of the following conditions is met, the pre-heating coil is engaged as a frost protection device:• The outside temperature is less than −3 °C and the

supply air temperature is less than 16.5 °Cor

• The outside temperature is less than −3 °C and the exit air temperature less than 6 °C or

• The outside temperature is less than −3 °C and the calculated heat recovery less than 60 %.

Fig. 12 Required heat output of the pre-heating coil depending on outside temperature

P Required heat output of the pre-heating coilT Outside temperature[1] Limit temperature[2] Flow rate 50 m3/h[3] Flow rate 100 m3/h[4] Flow rate 150 m3/h[5] Flow rate 200 m3/h[6] Flow rate 250 m3/h[7] Flow rate 300 m3/h

–25

–20

–15

–10

–5

–3

0

0 500 1000 1500 2000 2500

T / °C

P / W

765432

1

6 720 811 371-25.1O

The bypass in the device is always closed in winter mode.

If necessary, an electric or hydraulic heating coil can be installed to raise the air supply temperature. The reheater bank can be controlled independently from the supply air, room and / or extract air temperature ( Chapter 3.7.3).

HRV2-... – 6 720 818 999 (2015/12)14


3.7 Integrated ventilation functions of the ventilation device Logavent HRV2-...

The ventilation devices Logavent HRV2- ... have an integrated control unit, which takes over all monitoring, control and regulation of all assemblies (except a few accessories).Different settings can be selected using the integrated user interface:• Setting the ventilation stage in manual operating

mode• Setting the operating mode with weekly programme• Setting on-demand operating mode (only possible

with VOC, humidity or CO2 sensor accessories.)• Fireplace function• Operating mode summer, extract air• Manual bypass operation• Filter Reset• Setting the air flow rate (commissioning)

Fig. 13 Integrated user interface

[1] LED display ventilation stage [2] LED display “manual operating mode”[3] LED display “weekly programme” and “on-demand

operating mode”[4] LED display “bypass summer mode” and “summer

extract air”[5] LED display “filter reset” and “fault”[6] Button “filter reset” and “fault”[7] Button “bypass summer mode” and “summer

extract air”[8] Button “weekly programme” and “on-demand

operating mode”[9] Button “ventilation stage”

3.7.1 Setting the ventilation stage in manual operating mode

With the button, manual operating mode is activated and the desired ventilation stage may be set. The four LEDs on the intermittent wedge display show which ventilation level is activated.

3.7.2 Setting the operating mode with weekly programme

If only the ventilation unit is available without accessories, weekly programme 1 is activated. With optional accessories (e.g. radio remote control) other weekly programme settings can be selected.

6�720�811 373-44.1O

1 2 3 4 5

9 8 7 6

Ventilation stage

Time of day0 6 9 15 21

Monday to Friday321Saturday and Sunday321

0 8 13 16 21Table 5 Switching time for ventilation stages in weekly

programme 1

HRV2-... – 6 720 818 999 (2015/12) 15


3.7.3 Setting on-demand operating mode (with VOC1)-, Humidity or CO2 sensor)

Various sensors are available from the accessories range, with which the ventilation device can be set to on-demand mode. There are two distinct control principles:• The humidity sensor and VOC sensor determine the

required ventilation intensity from the relative humidity or air quality of the extract air sample

• The CO2 sensor is installed in a reference room. The air quality in this room control the whole system. The additional accessory is required to run the CO2 sensor.

In on-demand mode, the ventilation unit constantly determines the required ventilation intensity to keep the relative humidity (RH) and / or air quality (VOC- or CO2 content) at a comfortable level. The ventilation device automatically adjusts to the respective optimal ventilation intensity. When both a humidity sensor and a VOC - or CO2 sensor are used, the ventilation is adjusted according to the sensor with the higher flow rate reading.

Basic settings• Humidity: 45 % relative humidity (%RH)• CO2 concentration: medium intensity

(1101...1600 ppm at nominal volume flow rate)• VOC concentration: medium intensity

(1201...1500 ppm at nominal volume flow rate)The air condition measured is displayed in the operation data field. For precise control in on-demand operation mode according to air quality and humidity, the limit values in Tab. 6 and Tab. 7 should be followed.

The values can be changed using the radio remote control or the Logavent configuration tool (accessory).

1) Volatile Organic Compounds: Organic substances such as plastics, building materials, pieces of furniture, wall and floor coverings etc. that are contained within a room's indoor air. VOCs can cause headaches, allergies, skin irritation, fatigue and loss of performance to name just a few. The World Health Organisation (WHO) has summarised the consequences under the term "sick-building syndrome".

The ventilation device can only regulate ventilation on demand if at least one additional sensor is installed. We recommend installing a humidity sensor to prevent damage to the building or building components. In addition, the use of a VOC or CO2 sensor can ensure high air quality.

A maximum of 3 sensors can be connected (one VOC-, one humidity and one CO2 sensor respectively). For parallel operation with multiple sensors, the highest reading is used as a reference variable.

Screen display UnitRelative humidity

Very dry air RH % < 25

Dry air RH% 25 ... 34

Comfort level RH % 35 ... 65

Humid air RH % > 65

Table 6 On-demand operation according to humidity

Air quality limit values in ppm for adjustmentScreen display Air quality Low sensitivity Medium sensitivity High sensitivityControl with CO2 sensor (accessory)

Clean air 600 600 600

Sufficient air quality 601 ... 1300 601 ... 1100 601 ... 900

Slightly impure air 1301 ... 1800 1101 ... 1600 901 ... 1400

Impure air > 1800 > 1600 > 1400

Control with VOC sensor (accessory)Clean air 1000 800 600

Sufficient air quality 1001 ... 1500 801 ... 1200 601 ... 900

Slightly impure air 1501 ... 2000 1201 ... 1500 901 ... 1200

Impure air > 2000 > 1500 > 1200

Table 7 On-demand mode according to air quality

HRV2-... – 6 720 818 999 (2015/12)16


3.7.4 External control over digital inputOn the circuit board of the ventilation device it is possible to connect manual control with 2 digital inputs.

Fig. 14 External connections with the main PCB

DIG IN Digital external inputWhen the input is supplied with a signal, the following controls are possible:• Operation at ventilation stage 0 - 4 (closed contact)• Shutdown via a switch, e.g. smoke or fire alarm (open

contact)The desired control version can be selected with the configuration tool (accessory).When the external control is terminated, the ventilation device reverts to the programme selected prior to the use of external control. The exception is in the case of a safety shutdown, whereby the cause of the fault itself must be resolved. If necessary, the switch may have to be reset before quitting the fault display screen. For digital input 1, the cable of the switch provided by the customer should be connected in slots 2 and 4. For digital input 2, this should be connected in slot 3 and 4. Pin 1 is not used in either case.Both digital inputs may be used (e.g. one switch each for ventilation stage 1 and ventilation stage 4).The external control function can be installed, for example in the bathroom for intensive ventilation (stage 4) when the bath or shower is in use. The digital input can be used to control a timer if ventilation is not complete on leaving the bathroom. Ventilation function control is also possible via a simple switch in the absence of the resident.The use of digital input therefore offers a range of possibilities for external control. The ventilation device is made ready for use with this control technology. The provision of external components such as connectors (4-pole e.g. Dinkle EC350V-04P), switches, timers etc. must be made on site.

3.7.5 Fireplace function

This function can help when lighting a wood-fueled fireplace; by operating the volume flow of supply air at stage 3 for 7 minutes and simultaneously reducing the volume flow of extract air. If the supply air temperature reaches below 9 °C this function is suspended.

3.7.6 Operating mode summer, extract air

In summer, the pure ventilation function “summer extract air” can be selected. For this, the supply air fan stops, thereby reducing power consumption. The extract air continues to be extracted from the rooms affected by odours and moisture, which is particularly important for internal bathrooms and toilets (to avoid mould formation).As no outdoor air passes through the ventilation system into the building in "summer extract air" mode, one or more windows should be opened in supply air rooms to compensate.“Summer extract air” can only be activated when outside temperatures are above 14 °C. If outside temperatures fall below this level, “summer extract air” is disabled.

Operation of the ventilation device at ventilation stage 0 over a long period of time is not permissible, as this does not guarantee protection against damp.Permanent operation of the ventilation device at ventilation stage 4 is not recommended due to the high sound pressure level.

DIG IN

230V

ANTENNA MODBUS ETHERNET

6 720 811 371-24.1O

At outside temperatures below −13 °C this function is disabled

When simultaneously operating the ventilation device with open flue combustion equipment, the "summer extract air" operating mode should not be used. The required on site differential pressure sensor ( Chapter 3.8 on page 18) may otherwise be triggered regularly.

HRV2-... – 6 720 818 999 (2015/12) 17


3.7.7 Bypass operationThe devices have an automatic bypass flap. This allows cool outside air to enter the building via the heat exchanger (e.g. at night). If the outside temperature in summer is higher than the room temperature, the bypass closes and stops outside air from heating the building more.

Automatic bypass operation is set as standard. If the switch on conditions are met, manual bypass operation can be started.Using the radio remote control or the Logavent configuration tool, the minimum temperature for cooling outside air can be set.

Combustion air supply in bypassDepending on the channel connecting the device, version A (outside air and exit air right) or version B (outside air and exit air left), the following combustion air supply of the bypass will occur:• Version A: The bypass is an extract air bypass. The

extract air flows past the heat exchanger so the supply air is not heated. With the sound insulation effect of the heat exchanger, the sound power level is constant all year round in the supply air room.

• Version B: The bypass is a supply air bypass. The supply air flows past the heat exchanger and is therefore not heated.

3.7.8 Filter ResetIf the LED on the key is lit up orange, the designated time interval for the filter change has been exceeded. The filter must be changed.The default setting is a filter change interval of 6 months. The time interval may be changed via remote control or with the Logavent configuration tool. We recommend a filter change interval of between 6 and 12 months. Depending on the location, however, a shorter time interval may be necessary (due to traffic, environmental factors, etc.).

3.8 Operation with combustion equipment

3.8.1 Residential ventilation and balanced flue combustion equipment

According to recommendations from the Bundesverbands des Schornsteinfegerhandwerks [German Federal Association of Chimney Sweepers] (ZIV) “criteria for assessing the suitability and safe usability of combustion systems”, the operational reliability of balanced flue combustion systems for solid fuels, for which the permissable negative pressure in the installation room is restricted to 8 , must not be impaired by the operation of ambient air extraction systems.These specifications are considered to be met if• simultaneous operation of combustion equipment

and extraction systems are prevented by safety equipment, or

• flue gas routing is monitored by special safety equipment, or

• the system can technically guarantee that a pressure higher than 8 Pa cannot be reached during the operation of the combustion equipment.

The domestic ventilation system with heat recovery Buderus Logavent HRV2-... are set to balanced volume flow on commissioning. Therefore, the supply air flow and extract air flow quantities are equal. On these device the supply air fan is constantly monitored. In case of a fault arising or failure of the supply air fan, the extract air fan is also deactivated. Normally, a pressure of more than 8 Pa cannot be generated in the building when using these ventilation units. The devices are equipped with a pre-heating coil for frost protection. This may not be deactivated (e.g. with the Logavent-configuration tool). Otherwise, it is possible that the supply air fan is blocked by the frost protection circuit, while the extract air fan continues to run to keep the heat exchanger ice free. This can lead to negative pressure in the building.When the ventilation unit is commissioned, the supply and extract flow rates are adjusted. This means the supply air flow rate can be set to lower than the extract flow rate, which can also lead to negative pressure in the building.In addition, the ventilation units are equipped with a “summer extract air”.ventilation function. When this is activated, the supply air fan is switched off and the air must be fed toward open widows. If windows are closed when using the "summer extract air" function, this can generate negative pressure.For these reasons, a guarantee that the ventilation unit cannot generate a negative pressure of more than 8 Pa in the building can only be made if:• the integrated pre-heating coil is not deactivated,• the air balance is correctly set,• a window is open in the installation location of the

combustion equipment when “summer extract air” operating mode is activated, and

Parameter Unit Adjustment rangeSwitch position – on /offTmin °C 12 ... 15Tmax °C OF, 21 ... 24 ... 30Table 8 Settings for automatic bypass operation(default

settings highlighted)

Consent from a flue gas inspector must always be obtained before operation with combustion equipment.

HRV2-... – 6 720 818 999 (2015/12)18


• our maintenance notes are observed and most importantly, the filter is changed when required.

Only then is simultaneous operation of the ventilation unit with balanced flue combustion equipment for solid fuel permissible without special monitoring devices for the flue gas routing.For safety reasons however, we generally recommend an officially approved differential pressure sensor for monitoring the combustion equipment that is to be used. In the case of unauthorised negative pressure in the installation location, this switch must deactivate the ventilation unit. In this way, operation is risk free.

3.8.2 Domestic ventilation and open flue combustion equipment

According to the model provided by the Combustion Order [Germany], the operational safety of open flue combustion equipment must not be impaired by the operation of extraction systems, such as ventilation systems, for example. These specifications are considered to be met if • simultaneous operation of combustion equipment

and extraction systems are prevented by safety equipment, or

• the gas flue routing is monitored by special safety devices,

• the flue gas of the combustion equipment are removed via the extraction systems, or

• the system can technically guarantee that a dangerous negative pressure cannot be reached during the operation of the combustion equipment.

If a domestic ventilation unit is used simultaneously with open flue combustion materials, we generally recommend an officially approved differential pressure sensor for monitoring the combustion equipment that is to be used. In the case of unauthorised negative pressure in the installation location, this switch must deactivate the ventilation unit. Operation of the ventilation unit in systems with open flue combustion systems with multiple flues or chimneys is generally not permitted.

Fig. 15

[1] On / off switch (on site)[2] Differential pressure switch[3] Power supply of the ventilation unit

The switching contact in the differential pressure sensor must be suitable for the following connection conditions:

3.9 Device filterGenerally, the outside air is the reference for good air quality. Air filter for high demand (H label according to DIN 4719) must at least correspond to the filter class M5 according to DIN EN 779. Alternatively, alternative filters can be built into suitable positions in the ventilation unit. The conditions for a H-label are therefore also fulfilled if a G4 filter is installed in the mains of the ventilation unit, e.g. a wall outlet with an insect protection grille WG 160. The extract air from the respective rooms must be filtered for the higher demand to protect the ducting system and heat transfer system.With the Buderus Logavent HRV2-... domestic ventilation systems with heat recovery, the outdoor and extract air are extracted centrally and filtered in the ventilation device. The device comes equipped with high-quality, integrated filters of filter classG4. We also recommend installing optional fine filters (accessory) for special requirements (e.g. poor outside air quality) of filter class F7 according to DIN EN 779. The filters are made from a high-performance nonwoven fabric, which is characterized in comparison to other materials by a high efficiency at low air resistance. The hydrophobic material is particularly tear-resistant, up to 100 % fibreglass free and can be incinerated. The filter elements are very light and corrosion free (no metal parts).In table 10 ( Page 20), examples are shown of particle sizes of possible contamination of outside air and the filter classification.

Fig. 16 Filter set FS G4

N

L1

L1

N230�V�AC

3

2

6�720�811 371-01.1O

1

Connection condition HRV2-140 HRV2-230 HRV2-350Power supply 230 V / 50 HzPower supply with pre-heater

3.78 A 5.96 A 7.98 A

Table 9

6�720�818�484-10.1O

HRV2-... – 6 720 818 999 (2015/12) 19


Filter categories

Coarse and fine filter dust removal efficiencyTable 11 shows examples of dust removal efficiency of coarse, medium and fine filters for various particle sizes.

Pressure dropThe higher the filter class, the greater the pressure drop across the filter for the same filter surface and increase the electrical power consumption of the fan. The G4 filter is integrated in the devices as standard. F7 filters are available as an accessory.Changing to a F7 filter is only advisable for outside air. By changing from a G4 to a F7 filter the pressure drop increases by the following nominal flow rates:

This pressure drop must be taken into account for calculating the overall pressure drop when changing to a F7 filter. The increase in power consumption can be seen in Figure 36, 37 and 38.

Particle sizeFilter category Particle examples Application examples

Coarse dust filter for particles > 10 m

G1G2

• Insects• Textile fibres and hair• Sand• Fly-ash• Pollen• Spores, pollen• Cement dust

• For simple applications (e.g. as protection against insects in compact appliances)

G3G4

• Pre- and recirculation filter for civil defence shelters• Extract air from paint spray booths and kitchens• Contamination protection for air conditioning and

compact appliances (e.g. air conditioners set into windows, fans)

• Primary filter for filter categories F6 to F8Fine dust filter for particles 1 – 10 m

M5 • Pollen• Spores, pollen• Cement dust• Particles that result in stains

and dust deposits• Bacteria and germs on host

particles

• Outdoor air filters for rooms with low requirements (e.g. factory halls, store rooms, garages)

M5M6F7

• Pre- and recirculation filtration in centralised ventilation systems

• Final filters in air conditioning systems for show rooms, stores, offices and certain production facilities

• Primary filter for filter categories F9 to H11F7F8F9

• Oil fumes and agglomerated soot

• Tobacco smoke• Metal oxide fumes

• Final filters in air conditioning systems for offices, production facilities, control centres, hospitals, IT centres

• Primary filter for filter categories H11 to H13 plus active charcoal

Table 10 Filter categories

Filter category Dust removal efficiency in % by particle size in m

0.1 0.3 0.5 1 3 5 10 G1 – – – – 0 – 5 5 – 15 40 – 50G2 – – – 0 – 5 5 – 15 15 – 35 50 – 70G3 – – 0 – 5 5 – 15 15 – 35 35 – 70 70 – 85G4 – 0 – 5 5 – 15 15 – 35 30 – 55 60 – 90 85 – 98M5 0 – 10 5 – 15 15 – 30 30 – 50 70 – 90 90 – 99 > 98M6 5 – 15 10 – 25 20 – 40 50 – 65 85 – 95 95 – 99 > 99F7 25 – 35 45 – 60 60 – 75 85 – 95 > 98 > 99 > 99F8 35 – 45 65 – 75 80 – 90 95 – 98 > 99 > 99 > 99F9 45 – 60 75 – 85 90 – 95 > 98 > 99 > 99 > 99Table 11 Dust removal efficiency: (coarse filter: G1 to G4, medium filter: M5 and M6, fine filter F7 to F9)

Nominal flow rate

Additional pressure drop by changing from the G4 to the F7

filterHRV2-140 140 m3/h 15 PaHRV2-230 230 m3/h 15 PaHRV2-350 350 m3/h 24 PaTable 12

If when changing the filter, a different class of filter is installed, the air flow rate of the device must be reset by a contractor.

HRV2-... – 6 720 818 999 (2015/12)20


3.10 DrainageThe condensate generated by heat recovery from the extract air can be channelled into the public sewer system without further treatment as it is almost neutral. The ¾" condensate pipes can be found on the bottom of the device. The condensate is drained through a hose via a water-filled siphon (supplied) to the drain line.

Fig. 17

[1] Connection for mounting hose bracket[2] Drainage

For hygiene reasons and to avoid positive or negative pressure in the siphon and odour pollution, the ventilation unit [1] must be decoupled from the on-site siphon [2] (free drip, no connection with rubber siphon seal).

Fig. 18 Condensate discharge

[1] Ventilation unit siphon (supplied)[2] On site siphon

3.11 Installation accessoriesThe ventilation units Logavent can be wall mounted with a rail or wall bracket or free standing with a standing bracket:

The rail and brackets are available as accessories.The outgoing vibrations from the ventilation unit must be dampened and the unit must be acoustically insulated when mounted. The corresponding materials for this are included in the scope of delivery. of installation accessories.

The siphon is required to ensure the ventilation unit operates safely.

122

6 720 811 371-67.3O

6�720�811 371-43.1O

2

1

Mounting with

LogaventMounting

railWall

bracketStanding bracket

HRV2-140 X – XHRV2-230 X X XHRV2-350 – X XTable 13

HRV2-... – 6 720 818 999 (2015/12) 21


FSS standing bracket

Fig. 19 Scope of delivery

[1] Stand[2] Screw

Fig. 20 Ventilation device on FSS standing bracket

Mounting rail WHK


[1] Mounting rail[2] Spacer[3] Anti-vibration coupling[4] Rawl plug[5] Washer[5] Screw

Fig. 22 Ventilation device on wall mounting rail

[1] Mounting rail[2] Ventilation unit[3] Anti-vibration coupling

A B CFSS140 392 600 250 ... 260FSS230 565 700 250 ... 260FSS350 730 700 250 ... 260Table 14

6 720 812 844-01.2O

1

24 x

A B

C

6 720 814 484-16.1O

1

1 2

3

44 x

54 x

6 720 812 843-01.1O

64 x

6 720 814 484-18.2O

1

2

3

HRV2-... – 6 720 818 999 (2015/12)22


Wall mounting bracket WHS


[1] Wall mounting bracket[2] Bracket[3] Rawl plug[4] Washer

[5] Screw[6] Anti-vibration coupling[7] Nut[8] Washer

Fig. 24 Ventilation unit on wall mounting bracket WHS

3

4

8

5

6

7

4x

6�720�812�842-01.1O

2

1

2

1

225

250

545

40

... 230/350 ...

6�720�812 842-10.1O

HRV2-... – 6 720 818 999 (2015/12) 23


3.12 Layout

Fig. 25 Residential ventilation unit Logavent HRV2-140

[1] Cover[2] Casing[3] Control panel[4] Fan cover[5] Fan[6] Filter cover[7] Body[8] Controller circuit board[9] Power cable 2.5 m with safety plug[10] Filter[11] Test nipple[12] Air heat exchanger[13] Heat exchanger cover

6 720 811 373-55.1O

1

2

3

45

66

78

9

12

10

4

11

11

13

HRV2-... – 6 720 818 999 (2015/12)24




6 720 811 371-56.1O

1

2

3

45

6

67

89

12

10

4

11

11

13

HRV2-... – 6 720 818 999 (2015/12) 25




6 720 811 373-57.1O

1

2

3

4

56

67

8 9

12

10

4

11

11

13

HRV2-... – 6 720 818 999 (2015/12)26


3.13 Dimensions and specifications

Fig. 28 Logavent HRV2-140 (Dimensions in mm)

43015

600

6�720�811 371-28.1O

180 240 180

1000

90

Ø125 100

195

130

125

Ø125

120120

≥ 30

0

180

250

175

If the device is mounted with the FSS standing bracket, there is a gap of 250 mm between the device and the floor.

HRV2-... – 6 720 818 999 (2015/12) 27



60015

700

6�720�811 371-29.1O

225 250 225

1050

90

Ø150

≥ 30

0

140

203

237

160


HRV2-... – 6 720 818 999 (2015/12)28



7505

700

6�720�811 371-30.2O

225 250 225

1050

275

90

708

≥ 30

0

Ø180 158

283

289

183


HRV2-... – 6 720 818 999 (2015/12) 29


Fig. 31 Distance from ceiling HRV2-140

Fig. 32 Distance from the ceiling HRV2-230, HRV2-350

We recommend installing the device at a distance from the ceiling that places the user interface at eye level.

6�720�811 371-39.2O

≥ 30

0

6�720�811 371-40.2O

≥ 40

0

HRV2-... – 6 720 818 999 (2015/12)30


Unit HRV2-140 HRV2-230 HRV2-350Min - max application area stage 1 -stage 4 m3/h 25-180 30-300 60-450Maximum volume flow rate (nominal flow rate) m3/h 140 230 350Maximum compression at maximum volume flow rate Pa 100 100 100Minimum volume flow rate (nominal flow rate) m3/h 50 70 130Maximum compression at minimum volume flow rate Pa 150 175 170Average heat recovery efficiency (recovery rate) (DIBt) % 85 85 86Heat recovery efficiency (recovery rate)(EN 13141-7)1)

1) At specific operating point

% 90 90 89

Electrical power consumption (based on volume flow) W/(m3/h) 0.28 0.21 0.24Weighted sound power level at installation location (PHI)for flow rate / compression

dB(A)m3/h / Pa

52.1140 / 100

51.7230 / 100

56.6320 / 100

Maximum electrical efficiency according to DIBt – 24.6 36.1 36.1Protection class – IP X1D IP X1D IP X1DPower supply V / Hz 230 / 50 230 / 50 230 / 50Max. power supply (including pre-heater) A 3.78 5.96 7.98Max. power consumption (including pre-heater) W 870 1370 1840Pre-heater performance W 700 1200 1600Fan – EC radial fanHeat Exchanger – Cross counter current (aluminium)Weight kg 36.0 49.5 62.5Casing height– without control unit– with control unit

mmmm

10001045

10501095

10501095

Width, casing mm 600 700 700Casing depth mm 430 600 750Condensate connection Internal

diameter3/4" 3/4" 3/4"

Air connection diameter– without connection kit– with connection kit

mmmm

125125

150160

180160

DIBt approval – Z-51.3-325 Z-51.3-326 Z-51.3-327PHI certificate2)

2) The certificates can be retrieved here: www.buderus.de/hrv2

– Yes Yes YesTable 15 Technical Data

HRV2-... – 6 720 818 999 (2015/12) 31


3.14 Curves3.14.1 Curves, pressure increase/flow rate

Fig. 33 Pressure increase curve / flow rate HRV2-140

p Static pressure increaseV Air flow rate[A] Design field for the whole application area[B] Recommended design field for ventilation stage 3 (100 %)[1] Example of a system curve with the four ventilation stages in application area A[2] Ventilation stage 3 on the example of a system curve. This point represents the flow rate for the nominal

ventilation

Δp / Pa

2

00 20 40 60 80 100 120 140 160 180 200

50

100

150

200

250

6 720 811 371-21.3O V / m3/h.

1

B

A

.

HRV2-... – 6 720 818 999 (2015/12)32




ventilation

Δp / Pa

1

2

00 50 100 150 200 250 300 350 400

50

100

150

200

250

300

6 720 811 371-22.2O V / m3/h.

B

A

.

HRV2-... – 6 720 818 999 (2015/12) 33




ventilation

6 720 811 371-23.3O

Δp / Pa

V / m3/h.

00 100 200 300 400 500 600

50

100

150

200

250

300

350

1

2

B

A

.

HRV2-... – 6 720 818 999 (2015/12)34


3.14.2 Electrical power consumption curve, pressure increase and flow rate

Fig. 36 Curves Logavent HRV2-140



Key to Fig. 36 to Fig. 38:p Static pressure increaseP Electrical power consumptionV Flow rate

When using F7 device filters, the higher pressure drop must be accounted for ( Table 12 on page 20).

Δp / Pa

P / W

0

20

40

60

80

100

120

25020015010050

70

110120

140

6 720 614 484-13.1O

V / m3/h.

Δp / Pa

P / W

0

20

40

60

80

100

120

140

25020015010050

70110

150

230

6 720 614 484-14.1O

V / m3/h.

Δp / Pa

P / W

020

6040

80100

140

180

220

120

160

200

240

25020015010050

120

190

260

360

6 720 614 484-15.1O

V / m3/h.

.

HRV2-... – 6 720 818 999 (2015/12) 35


3.14.3 Sound values Logavent HRV2-...

Flow ratein m3/h

Pressure drop

Sound power level in dB(A)

Total63 125 250 500 1000 2000 4000 8000Extract air / outdoor air

90 50 45.0 51.9 51.3 48.1 37.3 33.1 27.7 14.7 56.0100 49.5 55.8 56.6 53.6 42.5 39.5 35.6 21.7 60.8

140 50 48.5 54.9 57.3 54.5 44.9 40.0 36.1 21.2 60.9100 51.4 56.6 60.8 58.1 48.6 44.2 41.3 26.9 64.1

Exit air / supply air

90 50 38.3 39.5 41.4 42.4 37.2 27.7 24.2 24.2 47.3100 41.9 45.5 47.3 46.7 41.4 34.4 26.8 15.7 52.3

140 50 40.6 44.1 48.0 46.2 40.9 37.2 30.2 21.2 52.1100 46.3 45.3 50.3 51.4 45.6 37.7 31.5 25.3 55.6

Installation location

90 50 – 38.3 41.9 42.1 38.0 30.0 17.0 19.4 46.6100 – 41.0 48.3 49.1 43.9 34.5 21.4 19.4 51.8

140 50 – 38.2 48.6 46.8 42.6 35.3 22.8 18.7 51.7100 – 39.0 46.5 48.0 45.5 39.5 28.1 20.4 52.1

Table 16 A-rated sound power level (LW,A) Logavent HRV2-140

Flow ratein m3/h

Pressure drop



150 75 44.8 51.5 55.0 47.5 39.9 38.5 32.4 25.3 57.5100 46.4 53.3 56.7 50.1 42.0 40.9 35.0 26.4 59.4125 48.8 54.0 58.6 52.2 43.6 43.0 37.0 27.5 61.0

230 75 45.9 50.9 60.8 53.5 47.3 47.4 42.7 36.1 62.3100 48.9 52.5 62.4 54.1 46.6 46.3 41.6 32.2 63.7125 49.9 53.4 63.4 55.4 47.7 47.6 43.1 34.0 64.8


150 75 40.8 47.4 46.1 42.2 36.2 31.1 25.5 24.0 51.1100 42.3 49.5 48.7 44.1 38.3 34.8 27.3 24.2 53.4125 43.4 50.7 51.8 46.1 40.6 36.6 29.4 24.5 55.4

230 75 42.9 45.2 51.4 45.7 41.4 37.0 31.7 26.0 54.0100 44.6 42.7 53.6 49.0 41.8 38.3 32.5 26.1 55.8125 45.2 43.8 54.8 50.5 43.2 39.7 33.9 26.9 57.0


150 75 26.4 39.9 41.4 41.8 36.4 32.3 18.8 20.3 46.6100 28.8 42.2 43.6 44.0 38.4 34.7 21.1 20.4 48.8125 29.1 43.1 45.6 45.7 40.4 36.7 23.3 20.5 50.5

230 75 29.8 40.2 45.1 44.8 41.0 38.7 26.3 20.1 49.8100 31.9 40.3 47.0 48.2 42.1 37.6 24.9 18.3 51.7125 32.5 42.5 48.2 49.4 43.8 41.4 29.8 21.7 53.3


Flow ratein m3/h

Pressure drop



240 100 56.3 62.9 63.6 55.8 48.7 44.4 39.0 27.3 67.1150 58.6 63.0 67.1 60.2 52.6 48.5 43.3 31.0 69.6

350 100 57.9 61.4 68.2 60.9 53.6 49.8 44.4 32.6 70.1150 59.3 62.6 70.3 63.1 56.4 52.3 47.2 35.9 72.0


240 100 47.8 57.5 55.5 49.0 45.4 37.8 30.9 24.6 60.4150 50.1 57.6 58.9 52.4 48.9 41.8 35.4 25.9 62.4

350 100 49.6 55.2 60.9 54.0 50.3 43.0 36.0 26.3 63.1150 52.0 56.5 63.4 56.4 53.2 45.8 39.2 28.2 65.4


240 100 34.7 48.3 50.8 46.4 43.2 38.0 22.8 19.4 54.2150 37.7 48.8 53.1 49.9 46.8 41.9 27.3 19.3 56.5

350 100 37.5 45.6 53.0 51.4 48.4 41.6 26.5 19.7 56.6150 38.9 49.0 57.9 53.4 50.8 45.7 31.1 21.1 60.4


HRV2-... – 6 720 818 999 (2015/12)36

4 Accessories for connection and controls


4.1 Radio remote control4.1.1 Product detailsWith the wireless radio remote control RCV on residential ventilation devices HRV2-140, HRV2-230 and HRV2-350,the device's operating modes can be set and information regarding the current air conditions and settings displayed.Up to 5 remote controls can be connected to each ventilation unit, on which settings can be adjusted simultaneously. The last setting to be adjusted determines the mode of operation.The range is approx. 30 m, even through walls and thin ceilings. This may vary depending on the battery level and condition of the building.

Scope of delivery• Remote controller• 2 batteries type AAA• Antenna• USB cable• Technical documentation

4.1.2 Control elements and displays

Fig. 39 Control elements and displays

[1] Display[2] Operation mode display[3] Information line[4] Navigation key[5] Operation data field[6] Time and day[7] Ventilation stage

1

7

2

6

3 4

56�720�811 652-01.1O

Symbol MeaningOn-demand operation (via sensor)

Manual operation

7-day program

Holiday function

Setback mode

Table 19 Operation mode display

Symbol MeaningFan OFF

Fan on stage 1

Fan on stage 2

Fan on stage 3

Fan on stage 4

Table 20 Ventilation stages

Symbol MeaningAlarmVentilation device fault with fault code displayAlphanumerical displayShows information regarding functions, programmes and fault codes:• A1: On-demand operation• P1, P2, ...: Weekly programme• BYP6: Manual bypass activated• FP7, FP6...: Flue function activatedFilter status

Battery status

Table 21 Information line

HRV2-... – 6 720 818 999 (2015/12) 37


4.1.3 Menu levels

Designation DescriptionUser levelSetting the time and day Setting the correct time. The default setting for time is Central European Time (CET) or

Central European Summer Time (CEST). The conversion is automatic. Activate on-demand operation

In on-demand mode, the ventilation unit constantly determines the required ventilation intensity to keep the relative humidity (RH) and / or air quality (VOC- or CO2 content) at a comfortable level. The ventilation device automatically adjusts to the respective optimal ventilation intensity. When both a humidity sensor and a VOC - or CO2 sensor are used, the ventilation is adjusted according to the sensor with the higher flow rate reading.

Activate manual operation

In manual operation the ventilation stages of the ventilation unit can be input directly. There is a choice available between the five stages 0, 1, 2, 3 und 4, stage four being the highest fan speed

Select weekly programme

In the weekly programme, the ventilation device adjusts the ventilation stages according to a schedule saved into the memory.

Activate / deactivate holiday function

With the holiday function, the ventilation device runs at minimum capacity (ventilation stage 1).The holiday function can be activated when the building is unoccupied during holidays to avoid moisture damage or contamination on return. After the holiday period, this function must be deactivated.

Activate / deactivate setback mode

In setback mode, the ventilation device runs at minimum capacity (ventilation stage 1). A time frame can be individually set. This will be repeated on a daily basis.Setback mode can be run as part of all operating modes.

Electric or hydraulic reheater bank

The reheater can be run at 3 different temperatures: room temperature (the room in which the remote control is installed), extract air temperature or supply air temperatureIt is possible to control the reheater based on one or more of these temperatures. When more than one temperature is set, the reheater works at the temperature which requires the highest performance.If the device is set to be controlled by room temperature and there are more than one remote control, the reheater works at the temperature which requires the highest performance.

Fireplace function With the flue function, burning of solid fuel combustion equipment in the living room is made easier. For this purpose, the flue function temporarily creates positive pressure in the room.

Bypass operation The devices have a bypass flap. This allows cool outside air to enter the building via the heat exchanger (e.g. at night).

Filter alarm Flashing display (orange-coloured LED) when the filter change interval has expired.Setting the filter change interval

The filter change interval is determined by the time between filter changes. We recommend a filter change interval of between 180 and 360 days (6 and 12 months). Depending on the location, however, a shorter time interval may be necessary (due to building works, traffic, environmental factors, etc.).

Contractor levelOpen and close installation menu

–

Software version display Remote control and / or control accessories (CA) software versionFan speed display Current fan speed of supply air and extract air fansError display If a fault occurs, the alphanumerical indicator in the remote control display shows a fault

code.Activate / deactivate pre-heating coil

–

Set min. / max. temperature for the bypass function

The minimum and maximum temperatures determine when the bypass opens and closes.

Overview of operation parameters

–

Returning to standard settings

–

Table 22 Remote control menu levels

HRV2-... – 6 720 818 999 (2015/12)38


4.2 Humidity sensor HS and air quality sensor VS

Fig. 40

[1] Humidity sensor VS[2] Air quality sensor VSThe humidity sensor and the air quality sensor measure the relative humidity or air quality of the whole extract air flow. With these values, the control unit determines the necessary fan intensity.

Fig. 41 Sensor installation location

[1] Humidity sensor VS[2] Air quality sensor VS[A] For version A[B] For version BThe sensors are connected directly onto the ventilation unit.

Fig. 42 Connecting the sensors to the ventilation unit

[1] Humidity sensor VS[2] Air quality sensor VS[D] Controller circuit boardIn on-demand mode the device adjusts itself according to the values transmitted by the sensors. For parallel operation with multiple sensors, the highest reading is used as a reference variable.Default settings• Humidity: 45 %• VOC concentration: medium intensity

(1201...1500 ppm at nominal volume flow rate)The values can be changed using the radio remote control or the Logavent configuration tool ( Chapter 3.7.3).

6 720 812 847-01.1O

2

1

6 720 812 847-11.1O

1

2

B

B

A

A

6 720 812 487-08.1O

USB

J9

J5 J23 J11 J17 J16

Tem

pera

ture

sen

sor

PressureVOCHumidityFan 2

ControlFan 1

ControlSwitch

1

SW2

AB

1 2

D

HRV2-... – 6 720 818 999 (2015/12) 39


4.3 Control accessories (CA)

Fig. 43

On the ventilation device HRV2-..., the following control accessories CA can be connected:• Electrical reheater bank HRE ...• Domestic hot water reheater bank HRW ...• CO2 sensor CS

Fig. 44

[1] Logavent HRV2-...CA Control accessoriesCS CO2 sensorHRE Electric heater bankHRW DHW heater bankThe accessories can be installed with the default settings without any additional accessories. For custom settings, the remote control or Logavent configuration tool is necessary.

Scope of delivery• Control CA with Modbus cable (3 m)• Technical documentation

Specification

4.3.1 Connecting the reheater bankThe reheater bank increases the air temperature. The accessories range includes the option of either an electrical reheater bank (HRE) or a domestic hot water reheater bank (HRW).If a reheater bank is connected, it is automatically recognised and operates according to the default settings.The reheater is controlled over a 0-10-V signal.It can be set to 3 different temperatures:• Supply air temperature, default setting: 18 °C• Extract air temperature, default setting: Of• Room temperature (room in which the remote control

is installed); default setting: Of

The temperature can be set using the remote control or the Logavent configuration tool.It is possible to control the reheater based on one or more of these temperatures. Temperatures set to OF, are not accounted for during adjustment.When more than one temperature is set, the reheater works at the temperature which requires the highest performance.If the device is set to be controlled by room temperature and there are more than one remote control, the reheater works at the temperature which requires the highest performance.

G

J11T1GTC

FilterAlarm

FailAlarm

Hygro-stat

StandbySwitch

Elec. PM

0V

0-10V

Pre

-hea

t/coo

l

Ala

rmIn

put

CO

2

AU

X

Afte

rhea

ter

Afte

rCoo

ler

0–10

GN

D

+A

C

0V

J12TFAH

0V

0-10V

0V

J13T2AC

0V

0-10V

0V

J7

J8

J9

+16V

0V

J1+

–24V

J2

FireTherm.

J3+

–24V

J5+12V

0V

D+

D–

T

J4

+1

2

–24V

Open

Open

P

0-10V

0VJ10

J6

USB

Pow

er InInput

Dam

per1D

amper2

ModB

us

+12V

SDA

SCL

OK

Fail

Status

0V

T2AH

0V

G

Y

Y

R

Y

R

Y

Y

Y

G

G

R

G

G

Y

G

Y

6 720 812 850-00.1O

1V

1U

24 V AC

230 V ACϑ

ϑ

M24V~

24V

GND

0-10V

2V

2U

N

L

N

L

PE

ϑ

1V+

GND

CO2

GND

2345678

HRW

HRE

CS

CA

1

6 720 814 484-17.1O

Power supply 12 V DC (±5 %)Temperature range- in operation- in storage

–20 ... +50 °C–40 ... +70 °C

Maximum relative humidity 95 % (non condensing)IP-Rating IP66Dimensions (W × H × D) 170 × 140 × 95 mmWeight 1050 gTable 23

Reheater bank Unit Adjustment range1)

1) Default settings are highlighted

Supply air temperature °C OF, 10 ... 18 ... 30Extract air temperature °C OF, 15 ... 30Room temperature °C OF, 15 ... 30Table 24 Adjustment range

To save energy, we recommend setting the controls using only the supply air temperature.

HRV2-... – 6 720 818 999 (2015/12)40


Fig. 45 Connecting the electrical heating battery HRE125/160

CA Control accessories for ventilation unitsHRE Electric heater bank

[1] Disconnector[2] Jumper to connecting terminal 21/22[3] Supply air duct temperature sensor TG-K300

after reheating

Fig. 46 Connecting the domestic hot water heating battery HRW125/160

CA Control accessories for ventilation units[1] Disconnector[2] Reactor[3] Frost protection temperature sensor A130

[4] Supply air duct temperature sensor TG-K300 after reheating

[5] Hot water connection valve

6�720�812�851-02.1O

N

L3N

L1L2

L1

5

6

7

8

1516

2122 A B C

F E

9

10

11

12

13

14

G

J11T1GTC

Elec. PM

0V

0-10V

Pre

-hea

t/coo

lA

fterh

eate

rA

fterC

oole

r

0–10

CA

GN

D

+A

C

0V

J12TFAH

0V

0-10V

0V

J13T2AC

0V

0-10V

0V

T2AH

0V

G

Y

G

G

Y

G

Y

HRE

ϑ

1

2

3

6�720�812�851-01.2O

1V

1U

24 V AC

230 V AC

G

J11T1GTC

Elec. PM

0V

0-10V

Pre

-hea

t/coo

lA

fterh

eate

rA

fterC

oole

r

0–10

CA

GN

D

+A

C

0V

J12TFAH

0V0-10V

0V

J13T2AC

0V

0-10V

0V

T2AH

0V

G

Y

G

G

Y

G

Y

ϑ

M24V~

24V

GND

0-10V

ϑ

2V

2U

N

L

1

2

3

4

5

HRV2-... – 6 720 818 999 (2015/12) 41


4.3.2 Connecting the CO2 sensor

Fig. 47 Connecting the CO2 sensor CS

CA Control accessories for ventilation unitsCS CO2 sensor (accessory)The terminals for the components are suitable for 1.5 mm2 cross-section connections. Cable should be laid on site.

6�720�812�848-01.1O

G

J11T1GTC

FilterAlarm

FailAlarm

Hygro-stat

StandbySwitch

Elec. PM

0V

0-10V

Pre

-hea

t/coo

l

Ala

rmIn

put

CO

2

AU

X

Afte

rhea

ter

Afte

rCoo

ler

CA

CS

0V

J12TFAM

0V0-10V

0V

J13T2AC

0V

0-10V

0V

J7

J8

J9 +16V

0V

0-10V

0V

J10+12V

SDA

SCL

OK

Fail

Status

0V

T2AM

0V

G

Y

Y

R

Y

Y

G

G

R

G

G

Y

G

Y

0–10

GN

D

+A

C1V+

GND

CO2

GND

2345678

HRV2-... – 6 720 818 999 (2015/12)42


4.4 CO2 sensor CS

Fig. 48

The CO2 sensor CS is used to determine the CO2 content of the room air in connection with controlled heat recovery ventilation. It should be installed in a reference room. The air quality in this room controls the whole system.

Der CO2 sensor is connected to the control accessory CA and takes control of the ventilation unit according to the CO2 values measured by the sensor.Default settings ( Chapter 3.7.3):• CO2 concentration: medium intensity

(1101...1600 ppm at nominal volume flow rate)

Scope of delivery• CO2 sensor CS• Installer Guide

Specification

Fig. 49 (Dimensions in mm)

For electrical connection and operation of the CO2 sensor, the control accessory CA is required ( Chapter 4.3).

6 720 812 848-00.1O

Designation ValueMeasurementMeasuring principle Nondispersive infrared

technology (NDIR)Sensor 2-ray infrared cellMeasuring range 0 ... 2000 ppmPrecision at 25 °C and 1013 mbar

± (50 ppm +2 % of measured value)

Measuring rate approx. 15 sTemperature: precision1) at 20 °C

1) UV=24 V DC and RL=250 Ω for versions with current output

±0.3 °C

General InformationDimensions (W × H × D)

85 mm × 100 mm × 26 mm

IP-Rating IP30Display LCD: alternating

CO2in ppm / T in °C Connection Screw terminal max. 1.5 mm2

Electromagnetic compatibility

EN 61326-1; EN 61326-2-3

Operating conditions –20 ... 60 °C; 0 ... 90 % rF (non condensing)

Storage conditions –20 ... 60 °C; 0 ... 90 % rF (non condensing)

Table 25

6 720 812 848-01.1O

85

100

HRV2-... – 6 720 818 999 (2015/12) 43


4.5 HRE electric heater bank ...


[1] Manual reset temperature limiter[2] Heater bank[3] Temperature sensor TG-K300

(with 1.5 m connection cable)[4] Installer Guide

The electrical heating battery HRE125 and HRE160 are used as the reheater bank.They are installed behind the ventilation unit in the direction of flow and heat the supply air that has been preheated as a result of the heat recovery process.It can be set to 3 different temperatures:• Supply air temperature• Extract air temperature• Room • Temperature To save energy, we recommend setting the controls using only the supply air temperature.Equipment level:• Automatic temperature switch• Manual reset temperature limiter• IP rating IP43• Continuously variable power control 0-10 V• Duct temperature sensor TG-K300The heater bank casing is made from zinc-plated sheet steel. The individual metal sections have airtight joints between them, whilst the duct connections are equipped with lip seals. The stainless steel heater rods are set into the casing.

Fitting and installation position

• The electrical heating battery is designed to be mounted by sliding into the standard ventilation duct (HRE125 for DN125, HRE160 for DN160).

• The heating battery can be installed into the duct horizontally or vertically.

• The control device can be mounted vertically or up to 90° horizontally as desired.

If the heating battery is supplied with an uneven flow of air as a result of turbulence, the overheating protection may be triggered. To avoid this from occuring:▶ Provide a straight duct section before and after the

heating battery [1] of at least twice the diameter of the duct.

Fig. 51

D Diameter of duct[1] Heater bank

• The clearance between the sheet casing of the heating battery and any wood or other combustible materials must be a minimum of 30 mm.

• The duct section with the heating battery built in must be accessible for the purposes of maintenance and part replacement.

Fig. 52

[1] Reheat temperature sensor TG-K300[2] Control accessories (CA)[3] Electrical heating battery HRE...[4] Ventilation unit

For electrical connection and operation of the electrical heating battery HRE, the control accessory CA is required ( Chapter 4.3).

WARNING: Fire hazard!▶ Only use metal piping directly on the

electrical heating battery (0.5 m).

6�720�617�544-07.1O

2

4

1

3

Clearance to deflectionsHRE125 > 250 mmHRE160 > 320 mmTable 26

6�720�617 544-08.1O

1≥ 2D

≥ 2DD

≥ 50

0≥

500

6�720�812�851-03.1O

3

4

21

1,5 m

3 m

HRV2-... – 6 720 818 999 (2015/12)44


Overheat protectionThe electrical heating batteries are equipped with two superheat protection devices (one for manual replacement). These are used to avoid overheating if there is insufficient air flow or a defective system.In the design process, it is important to bear in mind that the flow rate and flow speed must not fall short of the minimum value. This could trigger the overheating protection.The electrical heating battery only begins working when an air flow rate can be ascertained from the fan in the ventilation unit.The heating battery voltage must be interrupted as soon as the fan is switched off.

Technical Data

Fig. 53 Mounting dimensions of heating battery HRE125/160 (in mm)

Fig. 54 Resistance curve temperature sensor K300

R Electrical resistance Temperature

6�720�617�544-01.3O

278

375

42

42

ØD

82

Unit HRE125 HRE160

Power supply V / Hz 230 V / 50 Hz

230 V / 50 Hz

Performance W 900 1200Power consumption A 3.9 5.2Minimum air flow speed m/s 1.5 1.5Min. flow rate m3/h 70 110Air connections ( Figure 53, [Ø D])

– DN125 DN160

Maximum outlet temperature

°C 50 50

Maximum ambient temperature in operation

°C 30 30

Switching point safety temperature

°C 45 45

Switching point manual overheating protection

°C 65 65

Controlling power V 0 ... 10 0 ... 10Protection class – IP43 IP43Density category according to EN 1751

– Category C

Category C

Diameter air duct D mm 125 160Dimensions (W × H × D) mm 142 × 207

× 375177 × 242

× 375Weight kg 2.5 5.2Table 27 Technical data for heating battery HRE125/160

6 720 812 851-04.1O

0–10–20–3010

11

12

13

14

15

10 20 30

ϑ / °C

R / kΩ

HRV2-... – 6 720 818 999 (2015/12) 45


Fig. 55 Pressure drop / flow rate curve

p Pressure dropV Flow rate supply air[1] HRE125[2] HRE160

0 50 100 150 200 250 300 350 400 450

10

20

30

40

50

60

V�/�m3/h.

Δp�/�Pa

1

2

6 720 812 851-05.1O

.

HRV2-... – 6 720 818 999 (2015/12)46


4.6 DHW heater bank HRW125/160


[1] Heater bank[2] Valve[3] Temperature sensor supply air duct TG-K300

(with 1.5 m connection cable)[4] Reactor[5] Frost protection sensor TG-A130

(with 1.5 m connection cable)[6] Installer Guide

The domestic warm water heating battery HRW125/160 is designed to be the reheater bank for supply air. This can be mounted by sliding into the standard ventilation duct (HRW125 for DN125, HRW160 for DN160). The heating battery is connected with screw fittings Ø 10 mm on the water side.

Fitting and installation position

• The heating battery can be installed into the duct horizontally or vertically in the desired air flow direction.

• The duct section with the heating battery built in must be accessible for the purposes of maintenance and part replacement.

• Never subject the connection pipes on the reheater to rotational or bending stress. When installing and tightening, counterhold with a suitable tool.

• Expansion forces in the system of the weight of the pipe system itself must not put a strain on the heating battery connections.

• To relieve the weight from the vent, ensure that the pipes running lengthways in the pipe system are laid horizontally.

• Integrate the reheater into the heating network in a way that allows the system to be drained, e.g. if there is a risk of frost, if repairs are necessary or if the system will not be used for a prolonged period.

If the air current running through the reheater is uneven, the specified heat output may not be reached. In order to avoid this a straight duct section should be placed before and after the heating battery [1] of at least twice the diameter of the duct.

Fig. 57

D Diameter of duct[1] Heater bank

Warm water valveThe warm water valve must be connected at an appropriate position in the heating system.

Fig. 58

[1] Control accessories (CA)[2] Supply air duct temperature sensor TG-K300[3] Frost protection temperature sensor TG-A130[4] Hot water connection valve[5] Domestic hot water heating battery HRW...[6] Ventilation unit

For electrical connection and operation of the domestic hot water heating battery HRW..., the control accessory CA is required ( Chapter 4.3).

The domestic hot water reheater bank must not be used for cooling purposes or as a pre-heating coil. It is not constructively designed for these purposes.

The temperature of the installation location should be constantly at 12 °C.

6 720 812 852-04.2O

1 2

3

4

6

5

Clearance to deflectionsHRW125 > 250 mmHRW160 > 320 mmTable 28

6�720�812 852-10.1O

1≥ 2D

≥ 2DD

6�720�812�852-02.1O

5

6

12

3

4

1,5 m

1,5 m

3 m

M

HRV2-... – 6 720 818 999 (2015/12) 47


Technical Data

Fig. 59 Dimensions HRW125

Fig. 60 Dimensions HRW160

Fig. 61 Dimensions HRW125/160

125

180

137

188

238

10 (2x)

6 720 812 852-06.1O

255

212

263

313

10 (2x)

6 720 812 852-07.1O

160

6 720 812 852-08.1O

40 276

356

40

DHW heater bank HRW125 with air current HRW160 with air currentUnit 85 m3/h 150 m3/h 215 m3/h 145 m3/h 250 m3/h 355 m3/h

Maximum air outlet temperature1)

1) For water temperature of 55/45 °C

°C 32.6 29.7 27.8 37.9 34.5 32.3Heat output1) kW 0.5 0.8 0.9 1.1 1.7 2.1Pressure drop air Pa 10 26 48 6 14 25Pressure drop domestic hot water1) kPa 0.3 0.6 0.9 2.4 4.7 7.2Flow rate domestic hot water l/s 0.01 0.02 0.02 0.03 0.04 0.05Maximum DHW operating pressure bar 10 10Maximum operating temperature domestic hot water

°C 110 110

Weight kg 3.5 5.4Table 29 Technical data for supply air temperature of 15 °C

Table 29 shows the maximum air temperatures that can be reached with the given water temperature. If a lower set temperature is set with the remote control or the Logavent configuration tool, the valve is automatically set to this temperature.

ValveWater connection width Thread ½"Kvs value 0.6Type ZTV15-0.6Maximum power consumption 0.6 VATable 30 Domestic hot water valve

HRV2-... – 6 720 818 999 (2015/12)48


Fig. 62 Resistance curve temperature sensor TG-K300


Fig. 63 Resistance curve temperature sensor TG-A130


Fig. 64 Pressure drop / flow rate curve at air inlet temperature of 15 °C

p Pressure dropV Flow rate supply air[1] HRW125[2] HRW160

6 720 812 851-04.1O

0–10–20–3010

11

12

13

14

15

10 20 30

ϑ / °C

R / kΩ

6 720 812 852-11.1O

15105010

11

12

13

14

15

20 25 30

ϑ / °C

R / kΩ

050 75 100 125 150 175 200 225 250 275 300 325 350 375

5

10

15

20

25

30

35

40

45

50

V�/�m3/h.

Δp�/�Pa

6 720 812 852-09.1O

1

2

.

HRV2-... – 6 720 818 999 (2015/12) 49


4.7 Connection set CK ...

Fig. 65 Scope of delivery CK ...

[1] Plug-in connector[2] Sealant for EPS[3] Insulation strips with higher insulation value[4] Adhesive tapeThe connection set CK enables connection of the spiral duct or EPP pipes to the ventilation unit. For spiral seam pipes, the insulation strips with a higher insulation value should be used for connection with the device.For the required insulation values Table 32 on page 53.

Fig. 66 Connection with spiral-seam pipe

[1] Plug-in connector[3] Insulation strips with higher insulation value[A] Spiral-seam pipe

Fig. 67 Connection with EPP pipe

[1] Plug-in connector[EPP] EPP pipe with closed-cell soft foam

1

6 720 812 845-01.1O

ØB

ØA

2

3

4

4 x

4 x

6 720 812 845-07.1O

A

31

6 720 812 845-08.1O

1

EPP

HRV2-... – 6 720 818 999 (2015/12)50


4.8 Plug CP125 (optional, only for HRV2-140)On ventilation unit HRV2-140, the supply air connection can be selected from the bottom (floor connection). This offers the advantage of being able to connect the duct for example in the attic / loft.For this reason, the supply air connection on top of the device is sealed with the CP125 plug. On the bottom of the device, an opening has been pre-cut into the insulation and the plug-in connector for the pipe connection has been mounted.

Fig. 68 Assembly CP125 – version A

[1] Insulated plug CP125

Fig. 69 Plug-in connector assembly – version A

[1] Plug-in connectorThe other 3 ducts are connected on the top of the device.

For version B, the other connection must be used.

1

6 720 811 371-64.2O

1.

2. 4 x

6 720 811 371-65.1O

1

HRV2-... – 6 720 818 999 (2015/12) 51

5 Main line

5 Main line

Fig. 70

5.1 General InformationUse "technically smooth" pipes for air lines (the surface roughness of the material is crucial). The joints and butt joints must be airtight.All pipework and air ducts must be laid in a way that prevents vibrations from being transmitted. For the suspension of the ducts, plastic-coated perforated tape or pipe clamps with a rot-proof insert are suitable options.Effective calculation of dimensions and implementation of ducts minimises propulsion and auxiliary energy consumption. The maximum air flow speed in the duct network ( Table 31) should not be exceeded for energy saving and sound insulation purposes.

5.2 Thermal insulation of air pipeworkIn unheated sections, supply air and extract air lines must be thermally insulated to prevent heat loss. Outdoor and exit air ducts, which are often considerably lower than the installation location temperature, must be insulated against vapour diffusion to avoid heat loss and condensate formation. Without moisture-tight casing, the insulation will quickly become damp. Suitable insulation materials include closed-cell soft foam or EPP pipes.

Fig. 71 Assembly of air pipe connection with spiral-seam pipe

[1] Spiral-seam pipe[2] Insulation with normal insulation value

(e. g. = 0.045 W/mK)[3] Insulation with higher insulation value

(e. g. = 0.033 W/mK, component of accessory connection set CK)

[4] Plug-in connector (component of accessory connection set CK)

Maximum air flow speed within the pipeworkCollecting line for ventilation systems in detached houses and apartment buildings

5 m/s

Other piping 3 m/sTable 31 Air flow speed in duct network for “E” rating

6 720 816 821-45.1O

6 720 811 371-72.1O

1

2

34

HRV2-... – 6 720 818 999 (2015/12)52

5 Main line

Fig. 72 Assembly of air pipe connection with EPP pipe

[1] EPP pipe[2] Additional thermal insulation (if required)[3] Plug-in connector

The minimum insulation thickness for outside, extract, exit and supply air for “H” and “E” rating can be found in Table 32. According to DIN 1946-6, the “minimum” column corresponds to “H” rating ( Chapter 8.1.2) and “improved” for “E” rating ( Chapter 8.2.2).

5.3 Ducts made from EPPPropertiesThe EPP mouldings are made from 100 % expanded polypropylene (EPP) and can be used as outside and exit air ducts as well as floor connection ducts into which supply and extract air is introduced. External and exit air ducts can be equipped with additional insulation ( Table 32).The dimensions DN125 and DN160 are tailored to the device connections and the mouldings of the flat duct system.The EPP mouldings are much easier and lighter to use in comparison to commercially available spiral-seam pipes.The EPP material prevents structural sound transmission, is diffusion-proof and pre-insulated. The EPP plug-in connectors ensure a connection free of thermal bridges without additional sealing between the EPP mouldings. For connection with other materials, e.g. device connections or silencers SD..., an additional sealant is necessary. The 90° elbows can be divided at a predetermined groove into two 45° elbows.

For “H” and “E” classification according to DIN 1946-6, the minimum insulation thickness in Table 32 adjusted to the EPP material (Lambda value, wall thickness) must be observed.

6 720 811 371-73.1O

3

1

2

Ambient air temperature and insulation thickness for pipe laying ( = 0.045 W/(m × K))

Outside the thermal envelope, inside the building

Inside the thermal envelope

< 10 °C (e.g. roof) < 18 °C (e.g. cellar) 18 °CAir type and temperature of the air in the pipework (TL)

minimummm

improvedmm

minimummm

improvedmm

minimummm

improvedmm

Outdoor air (moisture-tight) 25 25 40 40 60 60Supply air TSU 20 °C 25 40 10 25 0 0Extract air 40 40 25 25 0 0Exhaust air (moisture-proof) 20 20 30 30 25 40Table 32 Requirements for insulating pipework to DIN 1946-6: 2009-05

To prevent condensate on the outdoor and exit air ducts carrying cold air, the EPP duct must be additionally insulated with at least 20 mm of diffusion-tight ( = 0.045 W/(K·m).

HRV2-... – 6 720 818 999 (2015/12) 53

5 Main line

5.3.1 EPP elbow 90 °/45 °

Technical Data

Fig. 73 Plug-in connector CEPP... and elbow ...

1 CEPP channel connector2 BEPP pipe elbow 90°

Pressure drop

Fig. 74 BEPP125 pressure drop

p Pressure dropV Flow rate

Fig. 75 BEPP160 pressure drop

p Pressure dropV Flow rateFor sound calculation, the insertion insulation values of the straight EPP tube can be used.

Unit .EPP125 .EPP160A mm 278 295Ø d1 mm 154 189Ø D1 mm 186 221K1 mm 16Ø d2 mm 125 160Ø D2 mm 155 190K2 mm 15 W/(K·m) 0.037Fire classification according to DIN 4102

– B2

Air-tightness according to DIN EN 12237

– B

Table 33 Technical data CEPP... and BEPP...

Ø d2K2

Ø D2

A

Ø d 1

K 1

Ø D 1

6�720�816�821-54.1O

2

1

Δp / Pa

0

1

2

3

4

5

0 50 100 150 200 250 300

6�720�802�146-24.1O V�/�m3/h.

.

Δp / Pa

0

1

2

3

4

5

0 50 100 150 200 250 300 350 400

6�720�802�146-26.1O V�/�m3/h.

.

HRV2-... – 6 720 818 999 (2015/12)54

5 Main line

5.3.2 EPP pipe

Technical Data

Fig. 76 Plug-in connector CEPP... and pipe DEPP...

1 CEPP channel connector2 DEPP channel pipe

Pressure drop

Fig. 77 DEPP125 pressure drop


Fig. 78 DEPP160 pressure drop


Sound insulation

Unit .EPP 125 .EPP 160Ø d1 mm 154 189Ø D1 mm 186 221K1 mm 16Ø d2 mm 125 160Ø D2 mm 155 190K2 mm 15 W/(K·m) 0.037Fire classification according to DIN 4102

– B2

Air-tightness according to DIN EN 12237

– B

Table 34 Technical data CEPP... and DEPP...

2

Ø d

K

Ø D

1000

1

Ø d 1

K 1

Ø D 1

6�720�803�720-01.1

Octave middle frequencyin Hz

Insertion insulation values in dB/m

63 5125 –1250 0500 01000 22000 34000 38000 4Table 35 Sound insulation DEPP...

Δp / Pa/m

0

1

2

3

4

5

0 50 100 150 200 250 300

6�720�802�146-23.1O V�/�m3/h.

.

Δp / Pa/m

0

1

2

3

4

5

0 50 100 150 200 250 300 350 400

6�720�802�146-25.1O V�/�m3/h.

.

HRV2-... – 6 720 818 999 (2015/12) 55

5 Main line

5.4 Outdoor air intake and exhaust air discharge

Fresh air and exit air openings on roofs, tile walls or other facades must be positioned so that no flue gas, snow of other contaminants can enter the ventilation system. Intakes near garages, roads with heavy traffic or near the ground should be avoided. Fresh air intake below ground level e.g. over a light shaft is not permitted.Generally, the outside air opening should be at least 1 m (better 2 m) above ground level to ensure the least possible contamination of the outside air. Maximum possible snowfall in winter should also be taken into account. There should not be a short circuit between the outdoor air intake and exit air outlet. This can be achieved by positioning the outdoor air and exhaust air vents on different roof sections and walls or through roof protrusions as well as via special constructions that feature a combined outdoor air and exhaust air element (accessories). If possible, a minimum distance of 2 m should be provided between separate openings and the prevailing wind direction taken into account. The exhaust air discharge should be on a wall that is not facing the wind direction; the outdoor air intake should face into the wind or be located on a neutral side to prevent the wind pressure from exerting any adverse influence.Always observe all relevant ambient conditions, e.g. window layout of neighbouring houses, where exhaust air discharge is concerned. To enable proper operation even when the roof is covered in snow, there should be sufficient clearance between the inlet opening and the roof surface for roof ducts. Furthermore, a suitable size vent should be provided. The free cross-section should correspond to the cross-section of the connected pipework. For weather grilles, it may be appropriate to select an internal pipe diameter that is larger than the appliance connections.

5.4.1 Outdoor air and exhaust air element without thermal bridges WGE125/160

Combined outdoor air and exhaust air element for wall mounting. Twisting the front panel enables the exhaust air to be routed to the left or right. Outdoor air is drawn in vertically from below. For a wall duct free of thermal bridges, two EPE pipe sleeves (length 550 mm, wall thickness 16 mm) are included in the scope of delivery.An air "short circuit" is prevented through the blow-off pulse of the exhaust air and the vertical drawing in of outdoor air. Deviations in pressure drops between outdoor air and exit air can be ignored, so that Figure 80 applies to both airways.

Technical Data

Fig. 79 Dimensions, outdoor-/exhaust air element WGE125/160 (dim. in mm)

1 Exit and outdoor air rotatingAU Outdoor airFO Exit air

Pressure drop

Fig. 80 Pressure drop, outdoor-/exhaust air element WGE125/160

[1] WGE125[2] WGE160p Pressure dropV Flow rate

A B C DWGE125 235 104 425 215WGE160 289 119 475 250Table 36

UnitOutdoor-/exhaust air element

WGE125 WGE160Connection Ø mm 2 × DN125 2 × DN160Width × height × depth1)

1) Indication of measurements without connector

mm 425 × 235 × 104 475 × 289 × 119

Material – Brushed stainless steel

Brushed stainless steel

Table 37 Specification, outdoor-/exhaust air element WGE125

FO

AU CD

A

B

1

6 720 618 325.59-3O

Δp / Pa

0

10

20

30

40

50

60

70

80

500 100 150 200 250 300 350 400

6�720�618�325-60.4O V�/�m3/h.

1 2

.

HRV2-... – 6 720 818 999 (2015/12)56

5 Main line

5.4.2 Roof outlet without thermal bridges DDF160/1Roof outlet without thermal bridges suitable for outside or exit air, removable hood.The roof outlet can be matched to the nominal sizes DN150, DN160 and DN200 by means of adaptor rings.Thermal bridge free thanks to EPP pipe sleeve DN200 interior Ø 300 mm exterior.For wall thicknesses of 300 mm to 600 mm.

Technical Data

Fig. 81 Dimensions, roof outlet DDF160/1 (dim. in mm)

[A] Connection Ø

Fig. 82 Section diagram installation of roof outlet DDF160/1 (measurements in mm)

[1] Pipe sleeve lateral seam[2] Pipe sleeve seam interior (sealed with aluminium

adhesive tape)[3] Seal slider made from PP with duct tape[4] Pipe sleeve made form EPP (two half shells)[5] Pipework connection part[6] For sealing plasterboard[7] Flue bracket[8] Roof batten[9] Plasterboard[10] Membrane[11] Rafter[12] Roof tile[13] Flexible cover[14] Connector for sealing pipe sleeve

Pressure drop

Fig. 83 Pressure drop roof outlet DDF160/1 connection DN160

p Pressure dropV Flow rate[1] Outdoor air[2] Exit air

Observe the height of possible snow cover.

Roof outlet DDF160/1Connection Ø mm DN150, DN160, DN200Colour – Possible on site with

roof paintMaterial – Stainless steelTable 38 Specification, roof outlet DDF160/1

6 720 802 146-07.2o

600500

495334

760

125

A345

Ø 300Ø 305

Ø 198

Ø 160 Ø 148

343

Schnitt A-A

A

A

25,

64

5,121

1 2

13

12

8

101110

9 8

6

5

4

3

7

14

6�720�802�146-06.1O

Δp / Pa

0

5

10

15

20

25

30

35

40

45

50

100 150 200 250 300 350 400

6�720�802�146-20.1O V�/�m3/h.

1

2

.

HRV2-... – 6 720 818 999 (2015/12) 57

5 Main line

5.4.3 Wall outlet with no thermal bridge WG160...Wall outlet without thermal bridges for outdoor air and exhaust air (weather protection with connection box and insect grille).The wall outlet can be matched to the nominal sizes DN150, DN160 and DN200 by means of adaptor rings.Thermal bridge free thanks to EPP pipe sleeve DN200 interior Ø 300 mm exterior. For wall thicknesses of 300 mm to 600 mm.

Technical Data

Fig. 84 Dimensions, wall outlet WG160/1 (dimensions in mm)

[A] Connection Ø

Fig. 85 Wall outlet dimensions WG160-2 (dimensions in mm)

[A] Connection Ø

Pressure drop

Fig. 86 Pressure drop wall outlet WG160/1 with connection DN160


Fig. 87 Pressure drop wall outlet WG160-2 with connection DN160


Weather louvre WG160/1 WG160-2Connection Ø mm DN150, DN160, DN200Connection plate mm 345 × 345 352 × 367Pipe sleeve – EPPAir grille – Plastic

(white)Stainless

steelInsect screen Yes NoTable 39 Technical Data

6 720 618 325.63-3O

300

345

350

A

600

6 720 802 146-11.2O

345

367

352600

AØ 300

Δp / Pa

0

10

20

30

40

50

60

70

80

90

100

100 150 200 250 300 350 400

6�720�618 325-64.2O V�/�m3/h.

1

2

.

25

20

15

10

5

0

Δp / Pa

100 150 200 250 300 350 400

6�720�802 146-05.1O V�/�m3/h.

1

2

.

HRV2-... – 6 720 818 999 (2015/12)58

5 Main line

5.5 Absorbing duet SD...Absorbing duet for reducing the noise level with nominal sizes DN125 and DN160.The absorbing duet should be provided to minimise the noise of the fan on the supply and extract air sides of the device. As they have no cross-sectional constriction, their usage does not result in an additional pressure drop. Only the installation length must be taken into accounting when calculating the pressure drop.

Absorber material• Mineral fibre-free

Technical Data

Fig. 88 Absorbing duet SD...

Sound insulation

Absorbing duet SD125 SD160Temperature-resistant

°C +200 +200

Dimensions- external (da)

- internal (di)- length

mm

mmmm

Ø 231 (DN224)Ø 1251000

Ø 257 (DN250)Ø 1601000

Terminalconnectionexternal (A cap)

mm Ø 124 Ø 159

Material – Aluminium AluminiumTable 40 Technical data SD...


Insertion insulation values in dB

125 10 10250 15 13500 33 301000 46 422000 42 324000 22 168000 15 12Total in dB (A) 19 18Table 41 Sound insulation SD...

6 720 816 821-58.1O

1000

da

di

HRV2-... – 6 720 818 999 (2015/12) 59

6 Air distribution channel system


Fig. 89

[8] Deflection FKB140-2 elbow 90° horizontal[11] Round duct RR75...[17] Deflection RRB75 90° adapter flat - round duct[19] Distribution box VK160

Duct networkFor air diffusion, two different channel systems can be used. The first is a flexible round duct system in DN75 and the other, which takes up less space, a 50 mm high flat ducting system. Both systems are suitable for installation in the floor structure or under suspended ceilings and interior walls.Both systems can be combined with one another. For this reason, all necessary and matching assemblies are available.The air pipes are made from PE plastic and have antibacterial and antistatic properties.Distribution to individual air ducts is carried out centrally with one distribution box each for supply and extract air respectively. In this way, flow rate and flow velocity in each canal remains small, minimising flow noise.Up to 24 air pipes can be connected to each distribution box.For floor laying, the air ducts are designed to be hardwearing. However, fundamental aspects of impact sound insulation must be taken into account, for example as few pipes as possible should be run through areas where people frequently come and go. Additional cover plates can be inserted in critical areas. The air ducts should be structurally sound insulated and sufficient fixing points should be provided.For building planning, greater floor installation heights should be considered ( page 61 f.).Information on individual assembly can be found page 71.

Quality seal TÜV-Süd [Germany]The TÜV SÜD quality label for “ventilation ducts and components made from non-metallic materials” ensure exceptionally high product quality. This quality label accounts for all components of the air distribution system. It falls into the standard group TAK-1-2013 of TÜV SÜD.Requirements for the components:• Materials are indicated (on plastic-specific

characteristic values)• Materials are monitored• Production process is monitored• Initial test performed• Production monitoring by TÜV SÜDFurthermore, additional requirements are placed on:• Air-tightness• Pressure drop• Temperature range• Fire resistance• Resistance against extreme pressure• Ring strength• Bending radii• Mechanical connections• Deflection / rigidity• Microbial efficacy• Food compatibility• Antistatic function• Cleaning procedures The whole channel system has been awarded with the TÜV-SÜD quality seal 'excellent'.

6 720 816 821-44.1O

1717

8

1119

8

HRV2-... – 6 720 818 999 (2015/12)60


Floor composition (detached houses)The following floor layouts apply for detached houses. In apartment buildings, observe the increased impact sound insulation and fire sections.

Fig. 90 Flat ducting on raw concrete ceiling (dimensions in mm)

[1] Flooring 10 mm[2] Screed: cement screed 50 mm for radiator heating,

for heated screed for underfloor heating 50 mm (min. 30 mm pipe coverage according to DIN 1264-4)

[3] Screed or construction foil 160 my (for drying system) 1 mm

[4] Additional insulation; with flat ducting min. 53 mm[5] Additional insulation 40 mm for unheated space /

footfall sound insulation 5 mm for unheated space[6] Raw concrete according to statistical calculation

Fig. 91 Round duct on raw concrete ceiling (dimensions in mm)




[4] Additional insulation; with round duct min. 86 mm[5] Additional insulation 40 mm for unheated space /

footfall sound insulation 5 mm for unheated space[6] Raw concrete according to statistical calculation

Fig. 92 Flat / round duct on raw concrete ceiling (dimensions in mm)




[4] Additional insulation 40 mm for unheated space / footfall sound insulation 5 mm for unheated space

[5] Raw concrete according to statistical calculation (min. 50 mm pipe covering DIN 4102)

Fig. 93 Holding rails or battens in suspended ceiling

[1] Raw concrete according to statistical calculation[2] Retaining rails or battens of suspended ceiling;

Height with flat ducting min. 53 mmHeight with flat ducting min. 86 mm

[3] Suspended ceiling

Floor layouts are specified by the design engineer.

6 720 816 821-23.1O

1

35

6

2

4

114

5/40

6 720 816 821-24.1O

1

3

5

6

2

4147

5/40

An additional temperature increase of supply air may occur in floor constructions with underfloor heating when the underfloor heating is in operation.

6 720 816 821-25.1O

1

3

5

2

4

615/

40

6 720 816 821-26.1O

1

32

HRV2-... – 6 720 818 999 (2015/12) 61


6.1 Distributor boxes

Fig. 94

[1] FK140 - Plastic flat duct 20m/coil [2] FKH140 - Fixation flat duct at ground [3] FKV140-3 - Connector flat duct-fitting [4] FKV140-2 - Connector flat duct-flat duct [5] FKV140-1 - Connect flat duct-distribution box [6] FKS140 - Closing cap for flat duct [7] FKB140-1 - Deflection 90 ° vertical [8] FKB140-2 - Deflection 90 ° horizontal [9] FKU140-2 - Floor/wall outlet flat duct [10] FKU140-1 - Diverter DN125 flat duct [11] RR75-1 - Plastic round duct DN75, 20m [12] RR75-2 - Plastic round duct DN75, 50m [13] RRV75 - Connect round duct-round duct [14] RRD75 - Set of seal and fixation [15] RRS75 - Closing cap for round duct

[16] RRU75-1 - Diverter DN125 round duct[17] RRB75 - 90° adapter flat - round duct[18] RRU75-2 - Floor/wall outlet round duct[19] VK160 - Distribution box [20] VKS - Closing cap distribution box[21] VKD - Throttle element [22] AG/W - Cover grille floor/wall outlet[23] AG/E - Design grille floor/wall outlet[24] SDE - Sound absorber element[25] ZU125 - Supply air valve [26] AV125 - Extract air valve

6 720 816 329-01.1O

13

3

3

4

26

24

10

11

19

19

21

20

16

15

8

3

3

13

12

9

14

25

26

17

3

7

3

3

5

18

2

22 23

22 23

6

HRV2-... – 6 720 818 999 (2015/12)62


6.1.1 VK160 – Distribution boxThe distribution box VK 160 distributes the air currents of supply and extract air to the individual supply and extract ducts. A distribution box must be provided for the supply air and extract air respectively.There are 5 options for connecting the main line which can be used alternately (2 connections on the top, 2 at the bottom and one on the front). Using the adaptor supplied, the main pipes can be connected with Ø 125 mm or Ø 160 mm.The unused connectors for the main line can be used an inspection aperture.There are 24 connections available on 3 sides of the distribution box for the supply and extract air ducts. For exclusive use of flat ducting FK140 via adaptor FKV140-1, 18 of these connections can be used.They can be assembled in suspended ceilings, flooring, within the insulation layer or on the wall.

Fig. 95 VK160

Unused connectors must be connected with the accompanying plugs (18 pcs.). Additional plugs are available as required as accessory VKS.

Fig. 96 VKS

The distribution box VK160 can be infused into the concrete ceiling or in the screed:• Infusing into concrete ceiling

The air distribution box must be taken into account in advance as art of the statistic calculations and design of the ceiling. The statistician should be informed about the position and size of the air distribution box by the designer of the ventilation unit. Care must be taken when concreting that the concrete from the pump is not fed directly onto the box, but around the edges.

• Infusing into screedThe screed is laid floating and forms a closed layer around the air distribution box. Due to the movements made by the screed, we recommend using an intermediate layer. The concrete floor structure must be defined by the technical designer.

Technical Data

Fig. 97 VK160

[7] VK160

6 720 816 329-25.1O

ø 87 23

6 720 816 329-13.1O

20

Distribution box VK160Width × height × depth mm 590 × 210 × 559Main line connection mm Ø 125/150/160/180Round duct connection mm 24 × Ø 78Material – Plastic PPTable 42 Technical data - distribution box VK160

179

559 590

21

0Ø125

6 720 816 329-12.1O

Ø187

Ø1

60

18 x 19

HRV2-... – 6 720 818 999 (2015/12) 63


Pressure drop

Fig. 98 Pressure drop air distribution box VK 160 per box (additional pressure drop depending on duct type to be taken into account Figure 99)

p Pressure dropV Flow rateIn addition to the pressure drop of the air distribution box VK160, the pressure drop shown in Figure 99 must be added depending on whether flat or round ducting is to be used and whether the distribution box is to be used for supply or extract air.

Fig. 99 Additional pressure drop with each line representing a duct type

[1] FK140 incl. FKV140-1, supply air[2] FK140 incl. FKV140-1, extract air[3] RR75, supply and extract airp Pressure dropV Flow rate

Sound insulation

For sound calculations, the insertion insulation values from Table 43 for distribution boxes can be adopted, regardless of how many cords are connected.

∆p / Pa

6 720 816 821-02.1O V / m3/h.

00

6

2

8

4

10

50 100 150 200 250 300 350 400

.

∆p / Pa

6 720 816 821-09.1O VK160+FKV-1 V / m3/h.

0

5

10

15

20

0 10 20 30 40 50

2

1

3

.



125 4250 12500 161000 132000 184000 18Table 43 Sound insulation VK 160

HRV2-... – 6 720 818 999 (2015/12)64


6.1.2 VKD - Throttle elementWith the throttle element VKD, the flow rates in the individual air ducts can be set. In addition, the free cross section of the VKD is changed by removing the ring [1] to [12], resulting in the required flow rate in the air duct.The Throttle elements VKD are assembled from within the air outlets of the distribution box VK160.

Fig. 100 VKD (dimensions in mm)

[21] VKD

Technical Data

Pressure drop

Fig. 101 Pressure drop throttle element VKD

[1-12] Removed ringp Pressure dropV Flow rate

Sound insulation

Throttle element VKDWidth × height mm 76 × 6Material – Plastic PPZeta– Delivered condition– 1 Rings removed– 2 Rings removed– 3 Rings removed– 4 Rings removed– 5 Rings removed– 6 Rings removed– 7 Rings removed– 8 Rings removed– 9 Rings removed– 10 Rings removed– 11 Rings removed– 12 Rings removed

–––––––––––––

20.0115.9812.459.417.325.303.632.621.821.240.770.410.18

Table 44 Throttle element VKD technical data

6

ø 82

6 720 816 329-14.1O

21



125 0250 1500 01000 02000 04000 0Table 45 Sound insulation VKD

0

10

20

30

40

0 10 20 30 40 50

50

60

70

80

90

100

110

120

2

1

0

3

4

5

7

9

12

......

...

∆p / Pa

6 720 816 821-11.1O V / m3/h.

.

HRV2-... – 6 720 818 999 (2015/12) 65


6.1.3 FKV140-1 – Connector FK140-VK160The connector FK140-VK160 enables connection of the flat ducting FK140 to the distribution box VK160.

Fig. 102 FKV140-1

Due to the width of the FKV140-1 a maximum of 3 FKV140-1 can be connected to the VK160 in a row of 4. The fourth connection must be connected with a plug FKS140 so that it is air-tight.

Fig. 103 FKV140-1 + VK160

Support clips are included in the scope of delivery of the FKV140-1. These clips must only be mounted directly behind the connector on the flat ducting and screwed onto the floor when mounting the first the connectors in the top row of the air distribution box. This is the only way to ensure air-tightness of the FKV140-1.

Fig. 104 FKV140-1 + FK140

Technical Data

Pressure drop

Sound insulation

113 160

Ø 84

6 720 816 329-04.1O

5 3 x

2 x

Click

19

5

1. 3

2.

6 720 816 329-34.2O

Connector FKV140-1Width × height mm 160 × 113Material – Plastic PPZeta– Supply air – Extract air

––

3.940.57

Table 46 Connector technical data FKV140-1

The pressure drop of the connector is already covered in the pressure drop of the distribution box. ( Figure 99).



125 0250 1500 21000 12000 54000 3Table 47 Sound insulation FKV140-1

6 720 816 329-60.1O

HRV2-... – 6 720 818 999 (2015/12)66


6.2 Round duct system6.2.1 RR75... – Round ductFlexible corrugated pipe made from plastic (PE) for combustion air supply and increased compression resistance with anti-static and antibacterial properties.

Fig. 105 RR75...

Installing the round ductThe bracket FKH140 is screwed on the subfloor and the round duct fixed with the bracket tab. The maximum clearance between 2 brackets FKH140 should be 2 m.

Fig. 106 RR75... + FKH

[2] Fixation flat duct at ground FKH140[11] Round duct RR75...

Technical Data

Due to the low UV resistance of the packaging, the pipes should only be stored outside for short periods of time.

L

ø 75

ø 63

6 720 816 329-16.1O

11

2.

3.

1.

6 720 816 329-50.1O

2

11

Round duct RR75... UnitDiameter– internal– external

mmmm

6375

Hydraulic diameter mm 63Length L– RR 75-1– RR 75-2

mm

2050

Pipe construction – Corrugated pipe, with smooth inside layer

Material – Plastic PEMaximum permissible temperature

°C –30 ... +60

Minimum bending radius (internal)

mm 150

Zeta– bent R = 150 mm – 0.32Table 48 Round duct technical data RR75...

For energy saving purposes, we recommend scaling the system so that the air velocity in the air duct network in the riser pipe is max. 5 m/s and in other pipework max. 3 m/s. This results in a maximum flow rate of 34 m3/h per round duct.

HRV2-... – 6 720 818 999 (2015/12) 67


Pressure drop

In collecting lines for ventilation units in detached houses and apartment buildings, the air velocity should be 5 m/s. Other pipework systems should not exceed a maximum air velocity of 3 m/s.

Fig. 107 Pressure drop round duct RR75... – straight

p Specific pressure dropV Flow rate

Fig. 108 Additional pressure drop per 90 °-elbow round duct RR75... – bent with radius 150 mm

p Specific pressure dropV Flow rate

Sound insulation

For sound calculation, the insertion insulation values from Table 50 can be used as well as for straight and bent round ducts.

Flow rate Flow velocity Pressure dropin m3/h in m/s in Pa/m10 0.9 0.215 1.3 0.620 1.8 1.225 2.2 1.930 2.7 2.835 3.1 3.940 3.6 5.2Table 49 Pressure drop round duct RR75...

V / m3/h.

6 720 816 329-13.1O Rundkanal gerade

∆p / Pa/m

00

10

8

6

4

21

9

7

5

3

5 10 15 20 25 30 35 40 45 50

.

V / m3/h.

6 720 816 329-14.1O Rundkanal gebogen

∆p / Pa/m

00

5

4

3

2

1

5 10 15 20 25 30 35 40 45 50

.



125 0250 1500 01000 02000 04000 1Table 50 Sound insulation RR75...

HRV2-... – 6 720 818 999 (2015/12)68


6.2.2 RRU75-1 – Diverter round ductThe diverter round duct RRU75-1 is used for connecting the supply or extract air valve DN125 to the round duct. It can be built into walls or ceilings.

Fig. 109 RRU75-1

[16] RRU75-1

Technical Data

Pressure drop

Fig. 110 Pressure drop RRU75-1 – Supply air

Fig. 111 Pressure drop RRU75-1 –Extract air

Key to Fig. 110 and Fig. 111:[1] 1 × RR75...[2] 2 × RR75...p Pressure dropV Flow rate

Sound insulation

For sound calculations, the insertion insulation values from table 52 for the deflection part can be adopted, regardless of whether one or two pipes are connected.

When placing the diverter round ducts, the minimum clearance between the valves and wall or ceilings should be taken into account ( Chapter 6.5).

Diverter round duct RRU75-1Diversion – 90 °Dimensions width × height × depth

mm 215 × 411 × 175

Connections – Round duct– Valve

mmmm

2 × 75Ø 125

Material – Plastic PPZeta– Supply air 1 × RR75...– Supply air 2 × RR75...– Extract air 1 × RR75...– Extract air 2 × RR75...

––––

1.150.770.971.33

Table 51 Diverter round duct - technical data RRU75-1

85

ø 126

6 720 816 329-21.1O

16

200200

79

411



125 2250 0500 11000 22000 14000 0Table 52 Sound insulation RRU 75-1

∆p / Pa

6 720 816 821-28.1O V / m3/h.

0

5

10

0 5 10 15 20 25 30 35 40 45 50

4321

6789

11121314

1

2

∆p / Pa

6 720 816 821-29.1O V / m3/h.

0

5

10

0 5 10 15 20 25 30 35 40 45 50

4321

6789

1112

1

2

.

HRV2-... – 6 720 818 999 (2015/12) 69


6.2.3 RRD75 – Connector for round ductWith the connectors for round duct RRD75 the round duct RR75... is connected with the different moulding parts.

Fig. 112 RRD75

Fig. 113 RR75... + RRD75 + VK160/RRV75/RRU75.../ RRB75

[C] VK160, RRV75, RRU75-1, RRU75-2, RRB75[11] RR75-1, RR75-2[14] RRD75

Technical Data

6.2.4 RRV75-2 – Double female connector for round duct

The double female connector for round duct RRV75-2 enables the connection of a second round duct.

Fig. 114 RRV75

RRV75-2 does not need to be taken into account when calculating the pressure drop.

6.2.5 RRS75 – Closing cap for round ductWith the plug for round duct RRS75 the female connector can be sealed on the round duct accessories. This may be temporarily necessary during the construction process or permanently for simple configuration of a double connection RRU75... or RRB75.

Fig. 115 RRS75

Fig. 116 RR75... + RRS75

[D] RRV75, RRU75-1, RRU75-2, RRB75[19] RRS75

Connector RRD75Dimensions diameter × height

mm 83 × 35.5

Material – Plastic PPTable 53 Connector technical data RRD75

35,5 ø 83

ø 79

ø 63

6 720 816 329-17.1O

1414

Rundrohr RR 75... mit Dichtungsset RD

in Muffe montieren

Click

C

14

11

6 720 816 329-42.1O

110ø 78

6 720 816 329-18.1O

13

47

ø 79

6 720 816 329-19.1O

15

6 720 816 329-43.1O

19

D

HRV2-... – 6 720 818 999 (2015/12)70


6.3 Flat ducting system6.3.1 FK140 – Plastic flat duct for flooringFlexible corrugated pipe made from plastic (PE) for combustion air supply and increased compression resistance with anti-static and antibacterial properties.Flat ducts enable significantly shallower installed heights than conventional air ducts.

Fig. 117 Plastic flat duct FK140

Installing the flat ductThe bracket FKH140 is screwed on the subfloor and the flat ducting fixed with the bracket tab. The maximum clearance between 2 brackets FKH140 should be 2 m.

Fig. 118 Installing the flat duct

[1] Plastic flat duct FK140[2] Bracket FKH140

Technical Data

Due to the low UV resistance of the packaging, the pipes should only be stored outside for short periods of time.

20 m

1424

9

6 720 816 329-02.1O

1

2. 1.

6 720 816 329-37.1O

2

1

Plastic flat duct FK140 UnitCross section (height × width)– interior– exterior

mmmm

37 × 13049 × 142

Hydraulic diameter mm 57.7Length m 20Pipe construction – Corrugated pipe,

with smooth inside layer

Material – Plastic PEMaximum permissible temperature

°C –30 ... +60

Minimum bending radius (interior)– horizontally bent– vertically bent

mm mm

400200

Zeta– horizontally bent R = 400 mm– vertically bent R = 200 mm

–

–

0.86

0.33

Table 54 Plastic flat ducting technical data FK140

For energy saving purposes, we recommend scaling the system so that the air velocity in the air duct network in the riser pipe is max. 5 m/s and in other pipework max. 3 m/s. This results in a maximum flow rate of 45 m3/h per flat duct.

HRV2-... – 6 720 818 999 (2015/12) 71


Pressure drop

In collecting lines for ventilation units in detached houses and apartment buildings, the air velocity should be 5 m/s. Other pipework systems should not exceed a maximum air velocity of 3 m/s.

Fig. 119 Pressure drop flat ducting FK140

[1] Additional pressure drop flat ducting FK140 – vertical 90 ° bent with radius 200 mm

[2] Pressure drop flat ducting FK140 – straight[3] Additional pressure drop flat ducting FK140 –

horizontal 90 ° bent with radius 400 mmp Specific pressure dropV Flow rate

Sound insulation

For sound calculation, the insertion insulation values from Table 56 can be used as well as for straight and bent flat ducts

Flow rate Flow velocity Pressure dropin m3/h in m/s in Pa/m10 0.6 0.215 1.0 0.420 1.3 0.625 1.6 0.830 1.9 1.035 2.2 1.340 2.5 1.745 2.9 2.0Table 55 Pressure drop plastic flat duct FK140

∆p / Pa/m

6 720 816 821-01.1O V / m3/h.

0

1

2

3

0 5 10 15 20 25 30 35 40 45 50

2

4

5

6

3

1

.



125 4250 1500 41000 12000 04000 1Table 56 Sound insulation FK140

HRV2-... – 6 720 818 999 (2015/12)72


6.3.2 FKB140-1 – Elbow 90 ° verticalThe elbow 90 ° vertical FKB140-1 is used to deflect the flat ducting FK140 to the transverse axis where there are space constraints. The flat ducting is inherently suitable for creating bends and bows itself. In the process, the minimum bending radii must be taken into account. If available space is limited, a smaller duct radius can be achieved with FKB140-1.

Fig. 120 FKB140-1

[7] FKB140-1

Technical Data

Pressure drop

Fig. 121 FKB140-1 pressure drop


Sound insulation

Elbow 90 ° vertical Connection flat ducting mm 148 × 48Dimensions width × height × depth

mm 105 × 105 × 160

Material – Plastic PPZeta – 0.43Table 57 Technical Data

160

105

10

5

6 720 816 329-08.1O

7



125 0250 1500 01000 12000 34000 1Table 58 Sound insulation FKB140-1

∆p / Pa

6 720 816 821-03.1O V / m3/h.

0

1

2

3

0 5 10 15 20 25 30 35 40 45 50

.

HRV2-... – 6 720 818 999 (2015/12) 73


6.3.3 FKB140-2 – Elbow 90 ° horizontalThe elbow 90 ° horizontal FKB140-2 is used to deflect the flat ducting FK140 to the vertical axis where there are space constraints.The flat ducting is inherently suitable for creating bends and bows itself. In the process, the minimum bending radii must be taken into account. If available space is limited, a smaller duct radius can be achieved with FKB140-2.

Fig. 122 FKB140-2

[8] FKB140-2

Technical Data

Pressure drop

Fig. 123 FKB140-2 pressure drop


Sound insulation

Elbow 90 ° horizontal Connection flat ducting mm 148 × 48Dimensions width × height × depth

mm 210 × 52 × 210

Material – Plastic PPZeta – 0.54Table 59 Technical data FKB140-2

160 160

52

210210

6 720 816 329-09.1O8



125 1250 4500 01000 02000 44000 1Table 60 Sound insulation FKB140-2

∆p / Pa

6 720 816 821-04.1O V / m3/h.

0

1

2

3

4

0 5 10 15 20 25 30 35 40 45 50

.

HRV2-... – 6 720 818 999 (2015/12)74


6.3.4 FKU140-1 – Diverter flat ductThe diverter flat duct FKU140-1 is used for connecting the supply or extract air valve DN125 to the flat duct. It can be built into walls or ceilings.

Fig. 124 FKU140-1

[10] FKU140-1

Technical Data

Pressure drop

Fig. 125 Pressure drop FKU140-1 – Supply air

Fig. 126 Pressure drop FKU140-1 –Extract air

Key to Fig. 125 and Fig. 126:[1] 1 × FK140[2] 2 × FK140p Pressure dropV Flow rate

Sound insulation

For sound calculations, the insertion insulation values from Table 62 for the deflection part can be adopted, regardless of whether one or two flat ducts are connected.

When placing the deflection parts, the minimum clearance between the valves and wall or ceilings should be taken into account ( Chapter 6.5).

Diverter flat duct FKU140-1Diversion – 90 °Dimensions width × height × depth

mm 357 × 378 × 178

Connections – Flat ducting– Valve

mmmm

148 × 48Ø 125

Material – Plastic PPZeta– Supply air 1 × FK 140– Supply air 2 × FK 140– Extract air 1 × FK 140– Extract air 2 × FK 140

––––

1.761.712.012.42

Table 61 Technical data FKU140-1

178

40

ø 126

197

37

8357

6 720 816 329-10.1O

10



125 1250 0500 11000 12000 14000 0Table 62 Sound insulation FKU140-1

∆p / Pa

6 720 816 821-05.1O V / m3/h.

0

5

10

0 5 10 15 20 25 30 35 40 45 50

43

2

1

67

8

9

111

2

∆p / Pa

6 720 816 821-08.1O V / m3/h.

0

5

10

0 5 10 15 20 25 30 35 40 45 50

4321

6789

1112

1

2

.

HRV2-... – 6 720 818 999 (2015/12) 75


6.3.5 RRB75 – 90° adapter flat - round ductThe connector RRB75 is used for changing from round duct to flat duct (or vice versa) e.g. for vertical ducts in the wall to horizontal ducts in the ground.

Fig. 127 RRB75

[17] RRB75

Technical Data

Pressure drop

Fig. 128 Pressure drop connection 90° RRB75

[1] FK140 1 × RR75...[2] 1 × RR75... FK140[3] 2 × RR75... FK140[4] FK140 2 × RR75...p Pressure dropV Flow rate

Sound insulation

For sound calculations, the insertion insulation values from Table 64 for the connector can be adopted, regardless of whether one or two round ducts are connected.

90° adapter flat - round duct RRB75Diversion – 90 °Dimensions width × height × depth

mm 200 × 140 × 98

Connections – Flat ducting– Round duct

mmmm

148 × 482 × Ø 75

Material – Plastic PPZeta– FK140 1 × RR75...– FK140 2 × RR75...– 1 × RR75... FK140– 2 × RR75... FK140

––––

4.720.403.861.18

Table 63 Technical data RRB 75

88

180200

Ø79

14

098

6 720 816 329-20.2O

17



125 0250 1500 01000 12000 64000 6Table 64 Sound insulation RRB75

∆p / Pa

6 720 816 821-17.1O V / m3/h.

0

5

10

15

20

25

0 5 10 15 20 25 30 35 40 45 50

3

4

1

2

.

HRV2-... – 6 720 818 999 (2015/12)76


6.3.6 FKV140-3 - Connector flat duct-fittingWith the connectors for flat ducting FKV140-3 the flat ducting FK140... is connected with the different moulding parts.

Fig. 129 FKV140-3

The flat ducting FK140 has a flat bottom and a domed top. For this reason it cannot be installed into the connector FKV140-3 arbitrarily. To help with orientation, a structure of the curved side of the connector is printed with a symbol of the curved side of the flat ducting.

Fig. 130 FK140 + FKV140-3

[1] FK140[3] FKV140-3The flat ducting must be assembled so that the printed symbol and the structure are on the same side. This is the only way of ensuring the connection is airtight.

Fig. 131 FK140 + FKV.../FKB.../FKU.../RRB75

[A] FKV140-1, FKV140-2, FKB140..., FKU140-2, RRB75[1] FK140[3] FKV140-3

Technical Data

100144

53147

6 720 816 329-06.1O

3

3

1

6 720 816 329-56.1O

Connector flat duct-fitting FKV140-3Dimensions – Width × height × depth– Width when assembled

mmmm

273 × 53 × 100175

Connections – Flat ducting– Moulding part

mmmm

148 × 48147 × 47

Material – Plastic PPTable 65 Connector - technical data FKV140-3

A

3

1

1.

3.2.

2.4.

6 720 816 329-35.1O

HRV2-... – 6 720 818 999 (2015/12) 77


6.3.7 FKV140-2 - Connector flat duct-flat ductThe connector flat duct-flat duct FKV140-2 enables the connection of a second flat ducting.

Fig. 132 FKV140-2

RRV75-2 does not need to be taken into account when calculating the pressure drop.

6.3.8 FKS140 - Closing cap for flat ductWith the plug for flat ducting FKS140 the female connector can be sealed on the flat ducting accessories. This may be temporarily necessary during the construction process or permanently for simple configuration of a double connection FKU140-1.

Fig. 133 FKS140

Fig. 134 FKS140 + FKV.../FKB.../FKU.../RRB75

[B] FKV140-1, FKV140-2, FKB140..., FKU140..., RRB75[6] FKS140

82 160

51

6 720 816 329-05.1O

4

22

190

50

6 720 816 329-07.1O

6

6 720 816 329-38.1O

6

B

HRV2-... – 6 720 818 999 (2015/12)78


6.4 Floor/wall outlet with air grille AG/...6.4.1 Floor/wall outlet flat duct FKU140-2Floor/wall outlet for intake of air grilles AG/... With enclosed plastic box. Connection for flat ducting FK140.This can be assembled either in the flooring or in the wall. The sound insulation of the outlets is less structurally limited.

Fig. 135 FKU140-2

Technical Data

Sound insulation

6.4.2 Floor/wall outlet round duct RRU75-2Floor/wall outlet for intake of air grilles AG/... With enclosed plastic box. Round duct connection RR75...This can be assembled either in the flooring or in the wall. The sound insulation of the outlets is less structurally limited.

Fig. 136 RRU75-2

Technical Data

Sound insulation

Floor/wall outlet flat duct FKU140-2Diversion ° 90Dimensions (width × height × depth)

mm 310 × 155 × 384

Connection flat ducting mm 148 × 48Material – Plastic PPZeta (with air grille) – 0.62Table 66 Technical data FKU140-2



125 3250 0500 11000 22000 24000 0Table 67 Sound insulation FKU140-2

15

5

384

310

87

6 720 816 329-11.1O

9

Floor/wall outlet round duct RRU75-2Diversion ° 90Dimensions (width × height × depth)

mm 310 × 155 × 384

Round duct connection mm 2 × Ø 75Material – Plastic PPZeta (with air grille)– 1 × RR75...– 2 × RR 75...

––

1.132.47

Table 68 Technical data RRU75-2



125 4250 0500 11000 32000 34000 1Table 69 Sound insulation RRU75-2

314384

15

5

92

91

6 720 816 329-22.1O

18

HRV2-... – 6 720 818 999 (2015/12) 79


6.4.3 Cover grille floor/wall outlet AG/W and Design grille floor/wall outlet AG/E

Air grille for floor/wall outlet FKU140-2 and RRU75-2.

Fig. 137 AG/W, AG/E

6.4.4 Pressure drop

Fig. 138 Pressure drop FKU140-2 with cover/design grille AG/...

Fig. 139 Pressure drop RRU 75-2 with cover/design grille AG/...

[1] 1 × RR75...[2] 2 × RR75...p Pressure dropV Flow rate

6.4.5 Sound insulation

Cover grille floor/wall outlet AG/W and Design grille floor/wall outlet AG/EDimensions (width × length)

mm 350 × 130

Material– AG/W– AG/E

––

Steel, coatedStainless steel

Colour– AG/W– AG/E

––

WhiteStainless steel

Table 70 Specifications of AG/W and AG/E

The flow rate is set with the throttle element VKD in the distribution box VK160 ( Chapter 6.1.2).

350

13

0

6 720 816 329-23.1O

22 23



125 10250 6500 31000 12000 14000 1Table 71 Sound insulation AG/...

To minimise flow noise, we recommend limiting flow rate to 45 m3/h.

∆p / Pa

6 720 816 821-31.1O V / m3/h.

0

5

10

0 5 10 15 20 25 30 35 40 45 50

4321

6789

1112

∆p / Pa

6 720 816 821-30.1O V / m3/h.

0

5

10

15

20

25

0 5 10 15 20 25 30 35 40 45 50

30

1

2

.

HRV2-... – 6 720 818 999 (2015/12)80


6.5 Valves for installation in pipe connectors DN125

Various valves are available for installation in pipe connectors DN125: • ZU125 - Supply air poppet valve• AV125 - Extract valve Standard• DV125 - Valve design• ZUW125 - Supply valve widethrow• AVD - Valve spin outlet• AV125/K - Extract valve kitchenThese valves are mounted in the nozzle of FKU140-1 or RRU75-1. The minimum clearance from walls and ceilings must be taken into account during the process.

The minimum clearance from walls and ceilings must already be taken into account when assembling the deflections FKU140-1 and RRU75-1.

HRV2-... – 6 720 818 999 (2015/12) 81


Wall-mounted

Fig. 140 Minimum clearance for wall-mounted installation

Fig. 141 Installation example, extract air valve AV125

[1] Flat duct[2] Deflection part[3] Plasterboard[4] Installation[5] Plaster[6] Extract air valve[7] Mounting frame: 1) installation depth 40 mm

Ceiling Installation

Fig. 142 Minimum clearance for ceiling mounting

Fig. 143 Installation example, supply air valve ZU125

[1] Flat duct FK140/ round duct RR75...[2] Diverter flat duct FKU140-1/RRU75-1[3] Screed[4] Membrane[5] Impact sound insulation[6] Installation[7] Structure-borne noise isolation[8] Concrete[9] Plaster[10] Supply air valve

Valve Wall clearance ADistance from

ceiling BZU125 300 300AV125 300 300DV125 350 350ZUW125 350 350AVD1)

1) Wall-mounting not sensible

– –AV125/K 350 350Table 72 Clearance for wall-mounted installation

A

B

6 720 816 821-22.1O

1

2

3

4 5

6

7

1)

6 720 618 325.70-1i

Valve Wall clearance AZU125 350AV125 350DV125 350ZUW1251)

1) Ceiling mounting not sensible

–AVD 600AV125/K 350Table 73 Clearance for ceiling mounting

6 720 816 821-27.1O

AA

1 23

6789

4

5

10

6 720 618 325.66-1i

HRV2-... – 6 720 818 999 (2015/12)82


6.5.1 ZU125 - Supply valve StandardVentilation air valve DN125 made from steel with white stove enamel for installation in the pipe connector Ø 125 mm from FKU140-1 and RRU75-1.The supply air valve is suitable for wall or ceiling mounting. Fine-tuning of air quantity can be done using the valve head ( Figure 146 Dimensions s).

Fig. 144

[1] Supply valve Standard[2] Installation frame

Pressure drop

Fig. 145

Fig. 146


Sound insulation

Supply valve Standard ZU125Dimensions (diameter × depth)

mm 182 × 63

Construction on wall mm 22Material – Enamel finish sheet

metalColor – whiteTable 74 Technical data ZU125

1

2

182

125

50

6 720 816 359-01.1O



63 14125 11250 8500 31000 12000 14000 08000 0Table 75 Sound insulation

To minimise flow noise, we recommend limiting flow rate to 45 m³/h.

1

1

S SS S SS

s

6 720 816 359-04.1O

500

5

10

15

20

0 10 20 30 40

25

30

∆p / Pa

6 720 816 359-11.1O V / m3/h

S =

.

–6 mm

–9 mm

12 mm

–3 mm

9 mm

0 mm

6 mm3 mm

.

HRV2-... – 6 720 818 999 (2015/12) 83


6.5.2 AV125 - Extract valve StandardExtract air valve DN125 made from steel with white stove-enamel finish, only mounting frame and air filter.The valve is for installing the pie connector DN125 from FKU140-1 and RRU75-1.The extract valve Standard is suitable for wall and ceiling mounting.Fine-tuning of air quantity can be done using the valve head ( Figure 149 Dimensions s).

Fig. 147

[1] Extract valve Standard[2] Installation frame[3] Filter

Pressure drop

Fig. 148

Fig. 149

s Dimensions sp Pressure dropV Flow rate

Sound insulation

FAU125 - Filter extract valve Standard for AV125The filter ([3] in Figure 147) from the scope of delivery of the extract air valve AV125 is also available as an accessory. Regular replacement of the filter ensures hygienic operation of the ventilation system. The filter is a sewn bag filter from filter class G4 for an easy exchange.

Supply valve Standard AV125Dimensions (diameter × depth)

mm 182 × 64

Construction on wall mm 22Material – Enamel finish sheet

metalColor – whiteTable 76 Technical data AV125

1

23

182

125

50

6 720 816 360-01.1O

s

1

1

S SS S SS 6 720 816 360-02.1O



63 20125 12250 6500 51000 32000 44000 58000 6Table 77 Sound insulation

To minimise flow noise, we recommend limiting flow rate to 45 m³/h.

According to DIN 1946-6 an air filter must be installed at every extract air valve for hygiene reasons.

500

10

20

30

40

0 10 20 30 40

50

60

70

80

90∆p / Pa

6 720 816 360-11.1O V / m3/h.

–9 mm

9 mm

–6 mm

6 mm

–3 mm

3 mm0 mm

S =

.

HRV2-... – 6 720 818 999 (2015/12)84


6.5.3 Sound absorber element - SDEThe sound absorber element SDE reduces the sound pressure level of the supply air flow entering the room.

Fig. 150 SDE

The sound absorber element is slid into deflector part FKU140-1 or RRU75-1 on the supply air side with the laminated side facing out. On the extract air side, the silencer can also be installed with the valve facing the laminated side.

Pressure drop

Fig. 151 Pressure drop SDE

Sound insulation

The sound absorber element SDE can only be dry cleaned. We recommend dusting down the part or using a hoover for cleaning 2x per year.

ø 127

50

6 720 816 329-24.1O

24Octave middle frequencyin Hz


125 0250 2500 11000 12000 44000 7Table 78 Sound insulation SDE

00

1,0

2,0

10 20 30 40 50

V / m3/h.

6 720 816 821-40.1O

0,5

1,5

2,5∆p / Pa

HRV2-... – 6 720 818 999 (2015/12) 85


6.5.4 Special valves

Air terminal deviceThe air terminal device is enclosed as a special valve for wall or ceiling. This is mounted in the pipe connector DN125 from FKU140-1 or RRU75-1. The valve covers can be set up without tools on the air terminal device.With a rotary throttling element in the air terminal device the flow rate can be adjusted.

Fig. 152

[1] Air terminal device[2] Filter (only required for DV125 as extract air valve)

Fig. 153 Setting the restrictor

1

2

6 720 816 821-21.1O

1. 2. 3.

TX 10 TX 10

6 720 816 364-02.2O

1 1 1

5 4 32

1

5 4 32

1

5 4 32

1

0 % = 50 % = 100 % =

HRV2-... – 6 720 818 999 (2015/12)86


The 3 special valves have no targeted effect of the sound insulation, but can be taken into account for the sound calculations with the reduction of noise on the open duct end.

Fig. 154 Noise reduction on open duct end

[1] In corner[2] On edge[3] In wall[4] In roomf FrequencyL Noise reduction

FDV125 - Filter valve design/spin outletThe filter FDV125 is part of the scope of delivery for the valves DV125, AVD125 and ZUW125. It is also available as an accessory. Regular replacement of the filter ensures hygienic operation of the ventilation system.The filter is a plastic filter (polypropylene) in the filter class G2 and can be exchanged without tools.

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

063 125 250 500 1000 2000 4000 8000

1

2 3 4

L�/�dB

f�/�Hz6 720 816 821-50.1O

According to DIN 1946-6 an air filter must be installed at every extract air valve for hygiene reasons. No filters are required for ventilation air valves.

HRV2-... – 6 720 818 999 (2015/12) 87


DV125 - Valve designThe valve design DV125 provides a visually appealing alternative to the poppet valves. It can be used as a supply or extract air valve.

Fig. 155 DV125

Fig. 156 Air casting distance for different flow rates

A Air casting distance from air terminal devicev Average air current velocity

Fig. 157 Flow noise for different flow rates - supply air

Fig. 158 Flow noise for different flow rates - extract air

Key to Fig. 157 and Fig. 158:[1] Restrictor closed[2] Restrictor half closed[3] Restrictor openp Pressure dropV Flow rate

Valve design DV125Dimensions (width × height × depth)

mm 172 × 170 × 7

Material – AluminiumColor – Stainless steelTable 79 Technical data DV125

6 720 816 821-18.1O

0,25 0,50 0,75 1,00 1,25 1,50 1,75 2,00

1,0

0,9

0,8

0,7

0,6

0,5

0,4

0,4

0,2

0,1

20 m3/h30 m3/h40 m3/h50 m3/h

6 720 816 821-37.1O A / m

v / m/s

V / m3/h.

∆p / Pa50

5

20 dB(A)

25 dB(A)

30 dB(A)

35 dB(A)

15 20 25 30 40 50 60

1 2 3

6 720 816 821-46.1O

6

7

8

9

10203040

V / m3/h.

∆p / Pa50

5

6

7

8

9

10203040

20 dB(A)

25 dB(A)

35 dB(A)

30 dB(A)

12 3

6 720 816 821-47.1O

15 20 25 30 40 50 60

.

HRV2-... – 6 720 818 999 (2015/12)88


Fig. 159 Pressure drop for usage as supply air valve

Fig. 160 Pressure drop for usage as extract air valve


The diagrams in Figure 157 to 160 show the curves for three restrictors as an example. Other in between settings are also possible, however.

∆p / Pa

6 720 816 821-33.1O V / m3/h.

0

10

20

30

40

50

0 10 20 30 40 50

1

2

3

∆p / Pa

6 720 816 821-34.1O V / m3/h.

0

10

20

30

40

50

0 10 20 30 40 50

1

2

3

.

HRV2-... – 6 720 818 999 (2015/12) 89


ZUW125 - Supply valve widethrowWith the supply valve widethrow ZUW125 the supply air is brought into the room. This compensates for the structurally unfavourable installation positions of the valves.

Fig. 161 ZUW125

Fig. 162 Air casting distance for different flow rates

A Air casting distance from air terminal devicev Average air current velocity

Fig. 163 Flow noise for different flow rates

Fig. 164 Pressure drop


Supply valve widethrow ZUW125Dimensions (width × height × depth)

mm 172 × 170 × 19.2

Material – AluminiumColor – Stainless steelTable 80 Technical data ZUW125

The diagrams in Figure 163 and 164 show the curves for three restrictors as an example. Other in between settings are also possible, however.

6 720 816 821-19.1O

0,5 1,0 1,5 2,0 2,5 3,0

1,0

0,9

0,8

0,7

0,6

0,5

0,4

0,4

0,2

0,1

20 m3/h30 m3/h40 m3/h50 m3/h

6 720 816 821-36.1O A / m

v / m/s

V / m3/h.

∆p / Pa

6 720 816 821-48.1O

80

5

10

20

40

15 20 25 30 40 50 60

3

1

2

25 dB(A)

30 dB(A)35 dB(A)

∆p / Pa

6 720 816 821-32.1O V / m3/h.

0

10

20

30

40

50

60

70

80

0 10 20 30 40 50

1

2

3

.

HRV2-... – 6 720 818 999 (2015/12)90


AVD - Valve spin outletWith the valve spin outlet AVD, the supply air is brought in over a wide but flat zone, which is therefore close to the ceiling. This allows even large volume flow into the room without drafts that might bother the residents.

Fig. 165 AVD125

Fig. 166 Flow noise for different flow rates

Due to the structural design of the valve, the air flow velocity 0.2 m/s at 500 mm from the ceiling.

Fig. 167 Casting distance and air flow velocity

Fig. 168 Pressure drop


Valve spin outlet AVDDimensions (width × height × depth)

mm 172 × 170 × 7

Material – AluminiumColor – Stainless steelTable 81 Technical data AVD

6 720 816 821-20.1O

V / m3/h.

∆p / Pa

6 720 816 821-49.1O

80

5

10

20

40

15 20 25 30 40 50 60

2 3

1

25 dB(A)

30 dB(A)

35 dB(A)

v < 0,2 m/s6 720 816 821-51.1O

500

mm

The diagrams in Figure 166 and 168 show the curves for three restrictors as an example. Other in between settings are also possible, however.

∆p / Pa

6 720 816 821-35.1O V / m3/h.

0

10

20

30

40

50

60

70

80

0 10 20 30 40 50

1

2

3

.

HRV2-... – 6 720 818 999 (2015/12) 91


6.5.5 AV125/K - Extract valve kitchenThe extract valve kitchen AV125/K is equipped with a G2 filter made from aluminium. This filter absorbs fat particles from the kitchen air.The cover is made from white enamel coated sheet metal.The kitchen valve has no targeted effect of the sound insulation, but can be taken into account for the sound calculations with the reduction of noise on the open duct end ( Figure 154).

Fig. 169 AV125/K

The flow-through cross section of the valve can be changed using a rotating restrictor. This also changes the pressure drop.

Fig. 170 AV125/K

Fig. 171 Pressure drop AV125/K

Key to Fig. 170 and Fig. 171:[0-5] Setting the restrictorp Pressure dropV Flow rate

Extract valve kitchen AV125/KDimensions (width × height × depth)

mm 220 × 220 × 65

Material – Enamel finish sheet metal

Color – whiteTable 82 Technical data AV125/K

6 720 816 821-41.1O

0

6 720 816 821-42.1O

2 14 3

0

2 14 3

02 1

4 30

4 3 2 10

4 3 2 10

= 0 %

1= 25 %

2= 50 %

3= 75 %

4= 100 %

∆p / Pa

6 720 816 821-38.1O V / m3/h.

0

10

20

30

40

50

60

0 10 20 30 40 50

1

2

3

4

.

HRV2-... – 6 720 818 999 (2015/12)92


Screen AV125/KThe extract valve kitchen AV125/K can be covered with cover SAV125/K.

Fig. 172

[3] AV125/K[B] SAV125/K

FAV125/K - Filter extract valve kitchenThe filter FAV125 is part of the scope of delivery for the extract valve kitchen AV125/K. It is also available as an accessory.The filter is an aluminium coarse filter mat of filter class G2. It can be removed without tools and cleaned e.g. in the dishwasher.

According to DIN 1946-6 an air filter must be installed at every extract air valve for hygiene reasons.

6 720 816 362-07.1O

B

3

HRV2-... – 6 720 818 999 (2015/12) 93

7 Regulations

7 RegulationsThe regulations and guidelines listed here only represent a selection - no claim is made regarding their completeness.The installation and commissioning must be carried out by a professional company. Practical implementation is subject to currently applicable technical rules. Observe the regulations of the relevant national or local Building Regulations.• Energy Saving Act EnEG [Germany]

Law for energy saving in buildings• Energy Saving Ordinance EnEV [Germany]

Regulation on energy saving thermal insulation and energy-saving systems engineering for buildings

• LBOState Building Regulations of the relevant German federal state

• LüARGuideline regarding fire protection requirements appertaining to ventilation systems of the respective German federal state

• DIN EN ISO 13790Energy efficiency of buildings.- calculation of energy needs for heating and cooling

• VDE 0100Installation of high voltage systems with rated voltages up to 1000 V

• DIN EN 779Particle air filters for general ventilation - determination of filtration performance

• DIN 1946-6Ventilation technology, Part 6: Ventilation of residential buildings – General requirements, requirements for measuring, performance and labelling, transfer / takeover (approval) and maintenance

• DIN 4108-7Thermal insulation and energy in buildings, Part 7:Air tightness of buildings, requirements, planning and execution as well as recommendations and examples

• DIN 4109Sound insulation in buildings, requirements and verification

• DIN V 4701-10Energy assessment of heating and ventilation systems, Part 10: Heating, DHW heating ventilation

• DIN 4719Ventilation of residential buildings – Requirements, output testing and identification of ventilation units

• DIN EN 12831heating systems in buildings - method for calculating average heat requirement

• DIN EN 1507Ventilation of residential buildings – Rectangular sheet metal air ducts – Requirements for durability and air-tightness

• DIN EN 60335-1Safety of electrical appliances for domestic and similar purposes, Part 1: general requirements

• EN 60335-2-30Safety of electrical appliances for domestic and similar purposes, Part 2-30: Special requirements for room heating devices

• VDI 2071 Heat recovery in air handling unit systems

• VDI 2081 Sheet 1 and VDI 2081 sheet 2Noise generation and noise reduction in ventilation systems

• VDI 2087Ventilation systems - Measuring principles

• VDI 3801 Operation of air handling unit systems

• VDI 6022 Sheet 1 Hygienic requirements for air handling units and devices

• VDMA 24186-1Performance programme for maintenance of technical air conditioning equipment and other technical equipment in buildings Part 1: Air conditioning devices and systems

HRV2-... – 6 720 818 999 (2015/12)94

8 General design information

8 General design informationGeneral requirements for ventilation systems according to DIN 1946-6For the ventilation of building units, the complete outdoor air flow rate can be determined by the following ventilation stages:• Intensive ventilation• Nominal ventilation• Reduced ventilation• Ventilation for dam protectionFor the ventilation of building units, the outdoor air change or air exchange of the building unit is influential. Air exchange between different functional units of between stairwell and utilisation units via the connecting door must be prevented in apartment buildings for hygiene reasons (MBO).The dual use of outdoor or supply air from the predominantly lesser polluted supply air rooms to the more highly polluted extract air rooms offers advantages in terms of heat and moisture loads, air pollutants and odorous substances in the entire service unit.Outbuildings such as cellars or hobby rooms may be connected to the same ventilation system, if it can be ensured that the quality of the ventilation of the entire service unit is not impaired.For proper functioning of all ventilation systems, a permanently air-tight building design should be ensured, both externally (building envelope) and internally (neighbouring apartments and non-residential areas, especially in apartment blocks). Leakage (infiltration) must be taken into account for the design of ventilation systems and air handling units.If fire protection requirements must be taken into account, national regulations are to be applied. General requirements for sound insulation according to DIN 4109 and VDI 4100 should be adhered to.For the entire building unit, the nominal ventilation without user support should be taken into account with the fan supported ventilation system. The nominal ventilation involves permanent ventilation for damp proofing (24 hours a day when windows are closed) and reduced ventilation. A design exclusively for ventilation for damp proofing or for reduced ventilation is not permitted. For intensive ventilation, the user must periodically open the window.

8.1 Hygiene requirements for ventilation systems

8.1.1 Basic hygienic requirementsAir lines with very uneven surfaces (flexible hoses) should be avoided, particularly for outdoor air and supply air. All pipework must be accessible for maintenance.Air extracted from extract areas such as kitchen, bathroom and toilet must be filtered prior to being drawn into the duct network.The minimum insulation thickness for outdoor, extract, supply and exit air can be found in Table 32 on page 53, column “minimum”.

Appropriate system commissioning and the maintenance of hygienic operation should be ensured by means of regular maintenance.Drawing in outdoor air immediately above ground level and from narrow pits and ducts is not permissible.Ducts should fulfil the requirements at least for air-tight class B according to DIN EN 12237.

8.1.2 Ventilation appliances as hygiene versions to DIN 4719 (H designation)

The surfaces of the ventilation appliances that are in contact with the air flow feature closed pores; thermal insulation is abrasion-proof and can be wiped clean. All components are easy to clean or change. The Buderus Logavent HRV2- ... device filter correspond to the filter class G4 (according to EN 779). For a H label at least M5 is required. This can be achieved e.g. with a F7 filter or with additional on-site filters. The required filter monitoring is integrated into the ventilation control unit.

8.1.3 Hygiene requirements according to VDI 6022The user is responsible for proper hygienic operation and installation of the ventilation device. The maintenance operations and intervals regarding hygiene for residential ventilation units can be found in the VDI 6022.The specified maintenance intervals include fundamental information that should be adapted to the location dependent conditions.To comply with hygiene requirements, the ventilation units must undergo regular hygiene checks. These include a visual inspection of the ventilation unit for hygiene problems such as pollution, limescale and damages. The aim of carrying out inspections is to spot these problems early on and rectify them as soon as possible.

8.2 Energy requirements for ventilation systems

8.2.1 Basic energy requirementsThe demand for drive and auxiliary energy must be minimised through adequate sizing and appropriate design of the air lines. The maximum value for air velocities in the duct network are limited to 5 m/s for extract air and 3 m/s for fan supply air.The minimum insulation thickness for outdoor, extract, supply and exit air can be found in Table 32 ( page 53), column“improved”.Appropriate system commissioning and the maintenance of energy efficient operation should be ensured by means of regular servicing.Ducts should fulfil the requirements at least for air-tight class B according to DIN EN 12237.

HRV2-... – 6 720 818 999 (2015/12) 95


8.2.2 Ventilation appliances as EC versions to DIN 4719 (E designation)

For fan assisted ventilation, the ventilation heat requirement of ventilation systems is positively influenced by the use of special ventilation devices DIN 4719 “E devices” as well as high air-tightness of the building envelope for free ventilation. For ventilation devices and systems with object-based better energy efficiency properties, the following requirements must be checked and confirmed, if the system has been classified as “E”.The casing insulation of the ventilation unit has a minimum thermal resistance of 0.5 m2K/W.Ventilation units with heat recovery must achieve at least a heat recovery efficiency level of 80 % and a maximum flow rate-based auxiliary energy consumption of no more than 0.45 W/(m3/h)The ventilation unit automatically switches after a certain time duration of intensive ventilation to nominal ventilation. The control unit features optimised frost protection.The ventilation appliance must enable ventilation for humidity control.

8.3 User orientationHeat should be recovered for every utility unit separately. The ventilation units must be equipped with devices that allow the influence of air flow rates of every building unit of the system users.Air exchange between different functional units of between stairwell and utilisation units via the connecting door must be prevented in apartment buildings.

8.4 Application area of the ventilation systemA fan-assisted ventilation system with variable air flow rates (demand-dependent) must cover the spread between ventilation as humidity control and intensive ventilation. For intensive ventilation, user dependent window ventilation must be taken into account.

8.5 Ventilation of windowless roomsVentilation of windowless rooms that come under“Building Inspection Directive on the ventilation of windowless kitchens, bathrooms and toilet rooms in dwellings” should follow the guidelines DIN 18017-3.

8.6 Connection of cooker hoodsTo protect the heat exchanger and the extract air fan against soiling from grease, no connection may be made from the cooker hood to the ventilation device despite integrated filters for hygiene reasons. Fatty deposits on the heat exchanger result in both hygienic disadvantage and energy waste during heat transfer and would mean regular cleaning or replacement of the heat exchanger. Aside from this, conventional cooker hoods work at a significantly higher flow rate of 300 m3/h to 600 m3/h.It is therefore advisable to extract the majority of the heat and water vapour via an extract air valve installed apart from the cooking area (e.g. in the ceiling). Independent operation of the cooker hood is, of course, still possible. To prevent heat losses entirely, recirculation cooker hoods with grease filters should be used.

8.7 Installation location and condensate drain

Where possible, install the ventilation unit inside the thermal envelope of the building (> 12 °C). The best place for this is either in the cellar, attic or loft, if these are not outside of the building insulation (e.g. uninsulated lofts). This can ensure short routes for the outdoor air and exhaust air lines. Generally speaking, the system may also be installed in any other room, e.g. in a utility room.Thanks to the fully insulated and thermal bridge-free casing, assembly outside of the building envelope is possible. However, the room must be kept at > 12 °C. When using a pumped DHW reheater bank, bear in mind the risk of system components with water content freezing up. Insulate the air lines in accordance with the values in tab. 32 on page 53. The ventilation device should not be installed outside under any circumstances. device should be installed so that maintenance (filter changes, expansion, heat exchanger) can be carried out easily.

A condensate drain must be available at the installation location. The pipework to the condensate drain should display a steady slope of approx. 2 %. If the pipework is channelled through an unheated area (loft) it must be thermally insulated. The condensate siphon is part of the standard delivery of Logavent ventilation appliances. To ensure the condensate is fully drained, level the appliance horizontally or mount it on the wall.

NOTICE: Damage from condensate. ▶ Level the appliance horizontally along its

X and Y axes.▶ Ensure that condensate can drain off

correctly.

Other notices are available DIN 1946-6 and DIN 4719. Please also see the installation instructions of the device.

HRV2-... – 6 720 818 999 (2015/12)96


8.8 Ventilation exceptionsSimultaneous operation of combustion equipment and a cooker hood have specific system technology requirements.

Simultaneous operation of the ventilation device, balanced flue combustion equipment and/or cooker hoods in recirculation modeThis operation has no specific requirements for the system technology or safety. Further information Chapter 3.8.The balanced combustibility of the combustion equipment must be demonstrated by a test certificate or a type-test qualification.

Fig. 173 Logavent HRV2-... and balanced flue combustion equipment

Simultaneous operation of the ventilation device, balanced flue combustion equipment and/or cooker hoods in recirculation modeThis operation requires safety equipment, e.g. differential pressure sensor ( Chapter 3.8). The combustion materials and flue gas routing must be monitored and the system is tripped, the ventilation unit must be switched off. If there is negative pressure in the installation location of the combustion equipment, this can lead to tripping.The installation of this safety device is generally carried out by a professional qualified to install it and must be undertaken by the flue gas inspector.

Fig. 174 Logavent HRV2-... and open flue combustion materials

Simultaneous operation of the ventilation device, balanced flue combustion equipment and/or cooker hoods in recirculation modeThis operation leads to increased extract flow rate and should therefore be avoided. In case a cooker hood's extractor is still in operation, it is important to ensure that enough outdoor air is coming into the room. This can be achieved e.g. via an automatically opening kitchen widow as soon as the cooker hood is turned on.

Fig. 175 Logavent HRV2-... and cooker hoods in extract air operation

6�720�814 484-03.1O6 720 814 484-04.1O

6�720�814 484-05.1O

HRV2-... – 6 720 818 999 (2015/12) 97


A ventilation unit for more than one residence (flats in apartment blocks)This operation is not intended as system design for Logavent HRV2-..., because for convenience reasons, each residence should be controlled separately.A Logavent HRV2-... ventilation system should be planned for each residence.

Fig. 176 Logavent HRV2-... in apartment building

The Logavent HRV2-... ventilation device and all accompanying ducts and accessories must be within the system limits of the residence in question and should not have any connections to other flats or residence quarters.

Ventilation system with outdoor and or exit air collecting lines (multiple assignment)This operation is not intended as system design for Logavent HRV2-....

Fig. 177 Logavent HRV2-... and collecting lines for exit and outdoor air

The Logavent HRV2-... ventilation device and all accompanying ducts and accessories must be within the system limits of the residence in question and should not have any connections to other flats or residence quarters.

8.9 Air circuitIn practice, the main focus should be the distribution of supply air, as this not only enables good air distribution but also an acceptable level of comfort without experiencing draughts.

Fig. 178 Air routing inside the room

[1] High TempIt is advantageous to allow the supply air to enter the room through an external wall. This ensures that the room is flushed with fresh air up to the internal door, as air moves in the direction of the pressure drop towards the rooms from which air is extracted. An elegant solution would be an overlap with the thermal flow from radiators. The combination flow of supply and ambient air guarantees the inhabitants continuous fresh air supply. The air ducts to the facades can be laid attractively on the rafters from above and in the flooring from below.An attractively priced solution for bringing in air into residential units on different floors would be to route it from the internal core, e.g. from hallways with suspended ceilings. As this air current works against the thermal heater current, the outdoor air should be warmed as close as possible to room temperature.The extraction of air creates a conical air flow without low effect only in the immediate vicinity of the extract point. Consequently, extract vents have no effect on the air distribution. However, extract air valves should be installed above or next to sites where odours are created to ensure they are extracted as speedily as possible.

6�720�814 484-06.1O

6�720�814 484-07.1O

6 720 618 325-74.2O

1

HRV2-... – 6 720 818 999 (2015/12)98


8.10 Sizing air linesDuct measurements must be for the nominal ventilation.It is recommended to stick to a maximum air flow velocity of 3 m/s during the design process for technical reasons related to pressure drop and acoustics.

8.11 Pressure drop calculationMake separate calculations of the supply air and extract air pressure drop. For this, the supply air fan must cover the pressure drop of the outdoor air and the supply air. The exit air fan must overcome the pressure loss of the extract air and the exit air. For this, the line path from the outdoor air intake to the furthest supply air valve (unfavourable supply air line) and from the furthest extract air valve to the exhaust air discharge (unfavourable extract air line) are taken into account. For this reason, the pressure increases are available in accordance with the fan curves. This ignores the pressure drop inside the ventilation appliance itself, as it is already part of the fan curves. For several parallel cords in larger building, butterfly valves should be provided on site. The lines are roughly balanced with the butterfly dampers and adjusted to the calculated pressure drop at the valves. The throttling of the valves alone can result in flow noise in more complex systems; these cannot be further attenuated. In such cases, only retrofitting pre-resistances into the duct work, e.g. butterfly dampers, would provide a remedy.For the channel system, it is important to ensure that resistance from the individual channels from the distributor are a similar as possible. For single, very short pipework systems, the resistance can be adjusted to an appropriate quantity of deflections.

8.12 Sound insulationAccording to DIN 4109 and DIN 1946 the following recommended values for sound pressure level apply to ventilation systems:• Living room and bedrooms 30 dB (A)• Functional rooms (bathroom, kitchen etc.) 35 dB (A)The DIN 4109 additionally allows an extra 5 dB (A) for ventilation systems for continuous noise without any noticeable individual sounds. However, this can be used as a minimum guide for the convenience demands of today to prevent health hazards for the inhabitants. In the VDI 4100 three soundproofing stages were therefore defined (SSt) which are determined in the planning stage and comply with today's standards. These details refer to the owner-occupied house or flat.• SSt 1:

meets the specifications of the DIN 4109; 30 dB(A) (35 dB(A)) for living rooms and bedrooms

• SSt 2:is the recommended specification for design; 30 dB(A)

• SSt 3:meets specifications for comfort requirements (recommended for bedrooms) 25 dB(A)

The sound protection levels apply for the whole living area. For other living areas however, various other soundproofing levels may be defined, e.g. in living rooms SSt 2 and in bedrooms SSt 3. It is generally recommended that the sound proofing be discussed with the construction team in advance.The following measures contribute to sound insulation:• Use of silencers• Adequate sizing of the air line network• Prevention of structure-borne noiseSound can easily propagate in a ventilation system, even in the opposite direction to the air flow. In addition to the natural insertion loss of the duct network, it is recommended that the sound emissions from the fan are attenuated immediately at the appliance by central silencers in both the supply air and extract air lines.Subject to the user habits, the use of silencers between the living room and bedrooms should also be checked out during the planning stage. These are known as telephony silencers.The sound transmission between two rooms according to VDI 2081 must not be higher over the ducting than through the partition wall. For the sound insulation value of the partition walls however, poorly insulated doors and overflow openings must also be taken into account. The architect can be consulted regarding the sound insulation value of all the partition walls. Along with silencers, the ducts with their branches and deflections have insulating effects. The values for sound insulation are carried out on the respective components.Apart from physical rubber mounts on the fans inside the appliance, additional isolation through anti-vibration mounts (incl. with the accessories) is recommended as a measure to prevent structure-borne noise transmission. Rubber mats or expanded foam rubber are also suitable. The connection from the ventilation device to the duct system should have structure-borne sound insulation. The stand or wall brackets available as accessories are insulated against vibrations.For practical system sizing, we recommend always mounting a silencer in the supply and extract air ducts on a ventilation device generating sound. Due to the low sound power levels of the device, and the sound insulating duct system, no additional sound insulation for inlets and outlets is necessary for conventional ventilation distribution systems. According to internal calculations, a value less than 25 dB (A) should always be observed in the room.For very short stub ducts with particularly high demands (e.g. bedroom, children's room) an additional sound absorber element SDE can be installed in the deflector.

HRV2-... – 6 720 818 999 (2015/12) 99


8.13 Overflow ventsFor proper operation of the residential ventilation system, the overcurrent of air from supply rooms to extract rooms of the living space must be ensured.For this, in the case of small air volumes the doors must be trimmed at the bottom or overflow vent grilles must be provided on site.By shortening the door, the flow velocity in the door gap should not exceed 1.5 m/s, which corresponds to a pressure drop of approx. 2 Pa.

Generally, quantities of air up to 20 m3/h should be easy to achieve with shortened doors.Trimming the door leaf further reduces the sound attenuation between rooms. A maximum permitted shortening of 12 mm has a lower sound insulation by 6 dB R'w result.When using overflow vent grilles, we differentiate between acoustically effective overflow elements and pure overflow vent grilles. In any case, the overflow options provided on site should always feature an open aperture in accordance with DIN 1946-6.

Door width Air volumePressure drop in PaGap height in mm

in mm in m3/h 5 6 7 8 9 10 12 750 10 0.48 0.34 0.25 0.19 0.15 0.12 0.09

15 1.08 0.77 0.56 0.43 0.34 0.28 0.2020 1.92 1.37 0.99 0.77 0.60 0.49 0.3525 – 2.14 1.55 1.21 0.94 0.77 0.5530 – – 2.22 1.74 1.35 1.11 0.7935 – – – – 1.84 1.51 1.0740 – – – – – 1.98 1.4045 – – – – – – 1.7850 – – – – – – 2.19

850 10 0.38 0.27 0.19 0.15 0.12 0.10 0.0715 0.85 0.60 0.43 0.34 0.26 0.22 0.1520 1.50 1.07 0.77 0.60 0.47 0.38 0.2725 – 1.67 1.21 0.94 0.73 0.60 0.4230 – – 1.74 1.35 1.05 0.87 0.6035 – – – 1.84 1.43 1.18 0.8240 – – – – 1.87 1.54 1.0745 – – – – – 1.95 1.3550 – – – – – – 1.6755 – – – – – – 2.02

Table 83 Pressure drop for shortened doors

Free surface AÜLD in cm2 for fan-assisted ventilationfor overcurrent qv, ÜLD in m3/h

10 20 30 40 50 60 70 80 90 100Doors with surrounding seal 25 50 75 100 125 150 175 200 225 250Doors with no seal – 25 50 75 100 125 150 175 200 225Table 84 Minimum free aperture of overflow vent apertures

HRV2-... – 6 720 818 999 (2015/12)100


8.14 Air lines and fire protectionFire protection is controlled in the respective regional building code. Depending on the building class and the height and number of building units or specific use of the building, special fire protection requirements may be in place. In special individual cases, we recommend contacting the relevant authorities for information on fire protection.For detached houses in Germany, there are no particular fire protection requirements, as for this size, there is no segregation into fire sections. The installation of fire dampers is therefore not required.

In apartment buildings with more than two full storeys and ventilation equipment that bridges fire walls, these must be made so that fire and smoke cannot be transferred to other floors or fire sections. When crossing fire sections and fire walls, observe the DIN 4102 (fire characteristics of building materials and structural components). In addition, observe all relevant national building regulations.

Building classesEvery building is individual and varies in its function. However, building types can be split into the following building classifications.

Fig. 179 Building classification (dimensions in m)

A,B Building unit[1] Building class 1, free-standing building with no more than 2 building units with a total of no more than 400 m2.[2] Building class 2, building with no more than 2 building units with a total of no more than 400 m2.[3] Building class 3, other buildings with a height (flooring upper surface) of up to 7 m.[4] Building class 4, buildings with a height of up to 13 m and building units with no more than 400 m2 respectively.[5] Building class 5, other buildings including subterranean buildings.

Building classes 1 and 2For detached and semi-detached houses, there are no specific requirements regarding fire protection. In this case, air ducts must not necessarily be made from non-flammable materials. The same applies within flats with more than one floor, if these are connected to one another (e.g. terraced houses) as well as a building unit up to 400 m² and no more than two floors.

Building classes 3 and higherFor these building classes, specific fir safety requirements apply for ventilation systems. Duct systems and their covers and insulation materials must be made of non-combustible materials. unless there is no risk that this will cause a fire or cause a fire to spread. Even space enclosing components may only be bypassed if there is no risk of fire spreading and no specific fire protection system in place.

A BA BA B

A BA BA B

≤ 400m2

≤ 7

≤ 400m2

≤ 7≤ 7

≤ 22

≤ 13

1 2 3 4 5

≤ 400m2

6�720�802 146-09.1O

HRV2-... – 6 720 818 999 (2015/12) 101

9 Appliance and system sizing

9 Appliance and system sizingDIN 1946-6 applies to the sizing of appliances and systems and specifies the calculation algorithms.

9.1 Total outdoor air flow rateFor design according to DIN 1946-6 the flow rate of the nominal ventilation should always be given.

Recommended appliance selection HRV2-350(for maximum 100 Pa external compression) HRV2-230

HRV2-140Surface of building unit ANE 1)

1) Heated surface ANE within building envelope that is to be taken into account for the ventilation design: for surface of building unit ANE < 30 m2 (per flat / building unit) ANE = 30 m2 implemented, for surface of building unit ANE > 210 m2 (per flat / building unit) the planned extract air flow rate should be adapted for the planned purpose (occupation density) in suitable way (e.g. equation with footnote 5).

m2 30 45 80 105 120 140 160 190 230 350Ventilation for damp protection thermal insulation high qv,ges,NE,FLh 2)

2) New building from 1995 or later or complete modernisation with required thermal insulation levels (at least WSchV 95, includes EnEV): qv,ges,NE,FL = 0.3 · qv,ges,NE,GL

m3/h 15 25 30 40 45 50 55 60 70 105

Ventilation for damp protection thermal insulation low qv,ges,NE,FLh 3)

3) Non or partly modernised buildings from before 1995 (e.g. with only windows changed increasing standard air-tightness of the building with low heat insulation) qv,ges,NE,FL = 0.4 · qv,ges,NE,NL

m3/h 20 30 45 50 55 65 70 80 90 140

Reduced ventilation qv,ges,NE,RL 4)

4) A reduction of the flow rate value for the “reduced ventilation is only possible, if this can be justified in terms of room usage: qv,ges,NE,RL = 0.7 · qv,ges,NE,NL”

m3/h 35 50 75 90 100 115 125 140 160 245Nominal ventilation qv,ges,NE,NL

5)6)

5) qv,ges,NE,NL = – 0.001 · ANE 2 + 1.15 · ANE + 20 (Usage area ANE in m2, outdoor air flow rate qv,ges in m3/h)6) The total outdoor air flow rates apply if there is a planned increase in number of people per usage area of at least 30 m3/h available

per person. A room height of 2.5 m is assigned to these values. For increased requirements (e.g. for pollutant values that exceed the normal levels) the extract air flow rate can be increased. Where there are more people than the irregular number per utility area, the specific air flow rate of 30 m3/(h · person) can be reduced, but not lower than the minimum of 20 m3/(h · person).

m3/h 55 70 105 130 140 160 180 200 230 350 Intensive ventilation qv,ges,NE,IL 7)

7) qv,ges,NE,IL = 1.3 · qv,ges,NE,NL

m3/h 100 125 150 175 200 220 245 265 300 450Table 85 Minimum total outdoor air flow rate for nominal ventilation

HRV2-... – 6 720 818 999 (2015/12)102


9.2 Total outdoor air flow rate for nominal ventilation

Formula for calculating the total outdoor air flow rate for nominal ventilation:

F. 1

ANE Heated surface within the building envelope DIN EN ISO 13789 in m2 (calculated area from the interior dimensions same as the calculations for individual rooms)

VV,ges NE Total outdoor air flow rate (in m3/h nominal ventilation)

V Flow rateIf the total outdoor air flow rate for nominal ventilation exceeds the specifications according to DIN EN 12831, the additional air flow rate for the heat load calculation should be taken into account separately (test using the air change-over Lw = 0.4 1/h).From the total outdoor air flow rate for nominal ventilation, all other planned total flow rates can be determined.For determining the total outdoor air flow rate, a decision must be made between damp proofing, reduced ventilation, nominal ventilation (essential for device selection) and intensive ventilation.The nominal ventilation is always the basis for sizing the ventilation system. Sizing by drawing on the ventilation for humidity control or for reduced ventilation is not permissible.

9.3 Total outdoor air flow rate for calculationFan assisted

F. 2

VV, ges,R,ab Sum of all extract air flow ratesVV, ges Total outdoor air flow rate in m3/hVV, ges,NE Outdoor air flow rate building unit

9.4 Total flow rate through the ventilation system

Formula for calculating the total flow rate through the ventilation system:

F. 3

VV,ges Total outdoor air flow rate in m3/hVV,ges,L Total air flow rate through ventilation unitin m3/hVV,Fen Air flow rate through window ventilation in m3/hVV,Inf Air flow rate through infiltration in m3/h

F. 4

VV, Fen Air flow rate through window ventilation in m3/h

F. 5

VV, ges Total outdoor air flow rate in m3/hVV, ges, L Total air flow rate through ventilation unitin m3/hVV, Inf Air flow rate through infiltration in m3/h

9.5 Air flow rate through infiltration

Supply and extract air system Logavent HRV2-...(central ventilation with WRG)Formula for calculating the air flow rate through infiltration of supply and extract air system Logavent HRV2-...:

F. 6

0,45 Correction factors for effective infiltration (fInf) balanced for supply and extract air systems (DIN 1946-6, Tab.8)

1,0 Average permitted air change-over according to Blower-Door in 1/h for new builds

2/3 Exponent if actual values regarding air-tightness are unavailable

p Differential pressure size in PaLow wind = 2 Pa (DIN 1946-6, appendix G)High wind = 4 Pa (DIN 1946-6, appendix G)

V Air volume in m3 (with interior surfaces according to DIN EN ISO 13789)

VV, Inf Air flow rate through infiltration in m3/h

Total outdoor air flow rate for humidity controlFormula for calculating the total outdoor air flow rate for humidity control:Minimum building standard WSchV 95:

F. 7

VV,ges Total outdoor air flow rate in m3/hVV,ges,L Total outdoor air flow rate in m3/h

(damp proofing)Before building standard WSchV 95, incl. partial modernisation:

F. 8


(damp proofing)

V· V,ges NE 0,001– ANE2 1,15 ANE 20+ +=

.

.

V· V,ges max V· V,ges,Ne; V· V,ges,R,ab =

...

V· V,ges,L V· V,ges V· V,Inf V· V,Fen+ –=

.

.

.

.

V· V,Fen 0=

.

V· V,ges,L V· V,ges V· V,Inf–=

.

.

.

V· V,Inf 0,45 V 1,0 p50-------

23---

=

.

V· V,ges,L 0,3 V· V,ges=

.

.


.

.

HRV2-... – 6 720 818 999 (2015/12) 103


Total outdoor air flow rate for reduced ventilationFormula for calculating the total outdoor air flow rate for reduced ventilation:

F. 9


(reduced ventilation)

Total outdoor air flow rate for intensive ventilationFormula for calculating the total outdoor air flow rate for intensive ventilation:

F. 10


(intensive ventilation)

9.6 Splitting the air flow rateExtract air flow from the roomFormula for calculating the extract air flow rate from the room:

F. 11

VV,ges,L Total air flow rate through ventilation unitin m3/hVV,L,EX Extract air flow rate through ventilation unit

in m3/hVV,R Minimum extract air flow rate through

ventilation unitin m3/h

F. 12

fV,R Factor, minimum extract air flow rateVV,ges,L Total air flow rate through ventilation unitin m3/hVV,L,EX Extract air flow rate through ventilation unit

in m3/h

Supply air flow rate into the roomFormula for calculating the supply air flow rate into the room:

F. 13

fR Splitting factor, supply airVV,ges,L Total air flow rate through ventilation unitin m3/hVV,L,SU Supply air flow rate through ventilation unit

in m3/h

Room

Nominal ventilation value for extract air

in m3/hWC, utility room, basement, pantry, poss. hall

25

Kitchen, bathroom, shower 45Table 86 Minimum extract air flow rates to be maintained


.

.


.

.

V· V,L,EXV· V,R

V· V,R------------------ V· V,ges,L=

.

.

.

V· V,L,EX fV,R V· V,ges,L=

.

.

For installing a sauna or other fitness room within residential buildings, a comparatively high flow rate is necessary for proper ventilation (100 m3/h according to DIN 1946-6). This would significantly influence the total flow rate design for the whole building, even if only used occasionally. Therefore, we recommend providing specially designed components from the sauna or fitness room manufacturer for this purpose.

RoomSplitting factor for

supply airLiving room 3.0 (0.5)Bedroom and nursery 2.0 (1.0)Dining room, guest room and study 1.5 (0.5)Table 87 Splitting factors for supply air

V· V,L,SUfR

fR------------ V· V,ges,L=

.

.

HRV2-... – 6 720 818 999 (2015/12)104

10 Sample design

10 Sample designThe following detached house is to be equipped with a domestic ventilation system with heat recovery.

The required project documents in the form of to-scale floor plans and a sectional view are required ( Figure 180 and Figure 181).

Floor plan – Sample design

Fig. 180 Floor plan (dim. in m)

2,27 1,70 3,45 1,79

2,95

2,47

1,18

0,24

3,42

3,42

0,24

3,42

7,80

3,42

0,24

0,70

1,00

0,70

0,96

3,49 2,30 3,45A

3,49 2,30 3,45

10,44

0,36

Living space28,96 m²

Room12,12 m²

Child 111,95 m²

Bathroom11,95 m²

Parents11,81 m²

Clearance4,69 m²

Corridor7,86 m²

Child 211,81 m²

Entrance14,25 m²

Kitchen10,2 m²

WCs5,02 m²

HWR6,71 m²

Attic

Ground floor

A

6 720 818 999-01.1TL

HRV2-... – 6 720 818 999 (2015/12) 105

10 Sample design

Sectional view – Sample design

Fig. 181 Sectional view (dim. in m)

45°

1,00

1,50

2,50

6 720 618 325-77.2O

HRV2-... – 6 720 818 999 (2015/12)106

10 Sample design

10.1 Appliance siting and air distributionBefore calculations are made, it should be clarified with the client whether there are special requirements (H-E labelling) for the ventilation system, where the ventilation syste will be placed and what type of ducting system will be used. In the example, a utility room is used for device design and air distribution is carried out with a combination of round and flat ducting. The use of each room must be defined to determine whether they are rooms that require a supply of air or require air to be extracted.

10.2 Sizing the air volume – calculation of volume air flow rate

Design of the ventilation device according to DIN 1946-6. For the determination of total outdoor air flow rate, the maximum of the total outdoor air flow rate is determined by the usage area and building unit ANE or by the sum of the extract air flow rate for individual rooms.Furthermore, the planned number of people who will used the building unit should be taken into account. The total outdoor air flow rates apply if there is a planned increase in number of people per usage area of at least 30 m3/h available per person.The value refers to a room height of 2.5 m. For increased requirements (e.g. for pollutant values that exceed the normal levels) the outdoor air flow rate can be increased. For a higher number of people per usage area than planned, the specific air flow rate of 30 m3/(h × Person) can be reduced, but not to less than 20 m3/(h × Person).(compare with DIN 1946-6)The total outdoor air flow rate of the ventilation unit in this example design is calculated by the nominal ventilation, now calculated using the total air flow rate with 165 m³/h, reduced to an infiltration flow rate which is around 18 m³/h for this building.For the flow rate of the ventilation unit, there is a significant flow rate of 147 m³/h, which is now also the basis for the device choice. Now the total outdoor air flow rate for damp-proofing, reduced ventilation and intensive ventilation can be determined using the corresponding calculation formula ( Chapter 9.5 Page 103).For the air quantity design the total air change-over Lw of the building must be tested to see if it conforms with the Energy Savings Order [Germany]. For living spaces an air change-over of 0.4 1/h is required according to DIN 1946-6. The distribution factors outlined in DIN 1946-6 for supply air and the extract air quantities to be observed can be found in Table 89 and 90 on page 108. With the help of these target values the air quantities for the room is determined according to 91 and Table 92 on page 108. The individual air quantities of the room can now be added to the floor plan ( Figure 182, page 109).

HRV2-... – 6 720 818 999 (2015/12) 107

10 Sample design

Flow rate Logavent HRV2-... – central ventilation

Determination of the extract air volume for each room

Determination of the supply air volume for each room

Total heated area ANE m2 137.33Average room height m 2.42Heated air volume ANE × h m3 332.3Supply air flow rate per person (not under 20 m3/h) m3 30Number of persons (planned) 4Total outdoor air flow rate per person m3/h 120Total outdoor air flow rate ( Formula 1 Page 103) m3/h 159Total extract air flow rate (sum extract air) m3/h 165Total outdoor air flow rate ( Formula 2 Page 103) m3/h 165Nominal ventilation m3/h 165Damp proofing (min. WschV) ( Formula 7 page 103) m3/h 50Damp proofing (under WschV) ( Formula 8 page 103) m3/h 66Reduced ventilation ( Formula 9 page 104) m3/h 116Intensive ventilation ( Formula 10 page 104) m3/h 215Ventilation unitInfiltration ( Formula 6 page 103) m3/h 18Flow rate, ventilation system m3/h 147Total air change 1h 0.44Table 88 Sizing the flow rate centralised ventilation (information, infiltration factor page 103)

Splitting factor fRLiving room 3.0 (0.5)Bedroom and nursery 2.0 (1.0)Dining room, guest room and study 1.5 (0.5)Table 89 Splitting factor for supply air flow rate

Extract air volumes to be maintainedVAB

in m3/hUtility room, WC, cellar, supply room 25Kitchen, bathroom, shower 45Table 90 Minimum extract air flow rates to be maintained

Extract air flow rate

Floor surface area

Average room height

Resulting room extract air quantity

Air change-over

Extract air room A H V Lw = V/(A × H) Valvesin m3/h in m2 in m in m3/h in 1/h –

Living room ground floor 25 6.71 2.5 22 1.31 1 × DV125WC ground floor 25 5.02 2.5 23 1.83 1 × DV125Kitchen ground floor 45 10.20 2.5 40 1.57 1 × AV125/KStorage room first floor 25 4.69 2.3 22 2.04 1 × DV125Bathroom first floor 45 11.95 2.3 40 1.46 1 × DV125Total 165 38.57 – 147 1.64 – Table 91 Extract air flow rate central ventilation

Splitting factor

Floor surface area

Average room height

Resulting room

extract air quantity

Air change-over

Supply air room fR A H V Lw = V/(A × H) Valves – in m2 in m in m3/h in 1/h –

Living room ground floor 3.0 28.96 2.5 42 0.58 2 × DV125Bedroom ground floor 1.5 12.12 2.5 21 0.69 1 × DV125Children 1 2.0 11.95 2.3 28 1.02 1 × FKU140-2 + AG/WChildren 2 2.0 11.81 2.3 28 1.03 1 × FKU140-2 + AG/WParents 2.0 11.81 2.3 28 1.03 1 × FKU140-2 + AG/WTotal 10.5 76.65 – 147 0.87 – Table 92 Supply air flow rate central ventilation

HRV2-... – 6 720 818 999 (2015/12)108

10 Sample design

Floor plan with air volume – supply air and extract air zones for domestic ventilation systems with heat recovery

Fig. 182 Floor plan (dim. in m)

2,27 1,70 3,45 1,79

2,95

2,47

1,18

0,24

3,42

3,42

0,24

3,42

7,80

3,42

0,24

0,70

1,00

0,70

0,96

3,49 2,30 3,45A

3,49 2,30 3,45

10,44

0,36

Living space28,96 m²Supply air 42 m3/h

2 pcs.Supply airCeiling installation

Room12,12 m²Supply air 21 m3/h

Supply airCeiling installation

Child 111,95 m²Supply air 28 m3/h

Floor outlet

Bathroom11,95 m²Extract air 40 m3/h

Extract airwith filterceiling/roof

Parents11,81 m²Supply air 28 m3/h

Floor outlet

Clearance4,69 m²Extract air 22 m3/h

Extract air valvewith filterWall

Corridor7,86 m²Overflow area

Child 211,81 m²Supply air 28 m3/h

Floor outlet

Entrance14,25 m²Overflow area

Kitchen10,2 m²Extract air 40 m3/h

Extract airwith filterceiling installation

WCs5,02 m²Extract air 23 m3/h


HWR6,71 m²Extract air 22 m3/h


Ground floor

Attic

A

6 720 818 999-02.1TL

HRV2-... – 6 720 818 999 (2015/12) 109

10 Sample design

10.3 Dimensions and layout of ductingWith the given air quantities for the individual rooms, the duct sizing.can be determined. The air flow velocity within the distributors should not exceed 3 m/s. With the low air quantities (maximum 28 m3/h for the children's room, supply air to the living room is distributed through two air valves) it is clear straight away that for this design, the substantial flow rate speed in the flooring ducts and supply and extract air valves falls significantly short. In the floor plan the ventilation device as well as the provided air distributor are indicated. Observe particularly the general engineering information when sizing the appliance and routing the lines.

10.3.1 Sizing of the air ductsAs described, pipes and flat ducting should be used in this example design. In this case, it was decided that pipes should be laid for vertically and ducts horizontally up to the distribution level. In the distribution level the flat ducting should be used.The cabling should be in the loft according to Figure 184 ( page 114). This enables the attic rooms to be supplied with supply air via floor outlets.The rooms on the ground floor are supplied via diverters through the ceiling. Supply air is drawn in and extract air drawn out via ceiling valves. In the attic, extract air is drawn in via extract air valves set into the wall or from the pitched roof in the bathroom. A line set into the floor in each room is perfectly adequate on account of the air volumes that can be moved. Due to the size of the living rooms two ducts with ventilation air valves are provided as flow rate with design supply air vents DV125 is limited to a maximum of 45 m3/h. In this way, a balanced air distribution in this large room is also ensured. The recommended process for pressure drop calculation of the ducts is described in the following section.

Pressure drop air duct – example designFor every air duct, the pressure drop coming out of the distributor box must be determined VK160 with help of the component in use and its quantity or length.To calculate pressure drop of the air ducts for individual rooms, we recommend the following process when using templates ( page 118):▶ Planning duct layout and adding them to the floor

layout plan.▶ Choose the components required for the planned

duct layout.▶ Add required flow rate and quantity of pipes per cord.▶ Calculate flow rate per pipe and length of pipes.▶ Enter number of components.▶ Determine and enter additional (specific) pressure

drops for individual components from the corresponding diagrams ( Chapter 6).

▶ Calculate and enter the pressure drop of individual components by multiplying the corresponding values (e.g. length × of specific pressure drop, quantity x specific pressure drop).

▶ Calculate and enter the complete pressure drop of the air duct by adding the pressure drop of the individual components.

Table 93 shows example calculations for the ducts from the distribution box into the room.For the final step, all supply and extract air cords must be set to the same pressure drop:▶ Determine the cord with the highest pressure drop.

The cord with the highest pressure drop is used at the reference for setting the dimensions of all other cords (e.g. highest value for supply air side: Children's room 2 OG with 32.8 Pa; highest value for the extract air side: Bathroom first floor with 36.9 Pa).

To adjust to the pressure drop of the other ducts we recommend:▶ Determine required additional pressure drop

“alignment” (difference between pressure drop of cords and highest pressure drop).

▶ Pre-throttle flow rate with the throttle element VKD through cross section change.– Read the correct quantity of removed rings with the

desired p alignment and the given flow rate from Figure 101.

▶ If necessary, fine adjustment of the valve in the room can be made on site.

HRV2-... – 6 720 818 999 (2015/12)110

10 Sample design

Description AbbreviationSupply and extract air SU SU SU SU SU SU EX EX EX EX EXFlow rate m3/h 21 21 21 28 28 28 22 23 40 40 22Pipe RR75Number of pipes per cord 1 or 2 1 1 1 1 1 1 1 1 2 2 1Resulting flow rate per pipe m3/h 21 21 21 28 28 28 22 23 20 20 22Length of the L cord m 1.5 0.5 0.5 0.5 1.5 1.5 0.5 0.5 0.5 2.0 0.5Specific pressure drop R Pa/m 1.3 1.3 1.3 2.4 2.4 2.4 1.4 1.6 1.2 1.2 1.4Pressure drop RxL Pa 2.0 0.7 0.7 1.2 3.6 3.6 0.7 0.8 0.6 2.4 0.7Distribution box connection pipe Pa 3.1 3.1 3.1 5.5 5.5 5.5 3.4 3.7 2.8 2.8 3.490 ° bent pipe bending radius 150 mm Pc. 2.0 1.0 1.0 1.0 2.0 2.0 2.0 1.0 1.0 1.5 1.0

Pa/pc 0.6 0.6 0.6 1.4 1.4 1.4 0.7 0.8 0.6 0.6 0.7Pa 1.2 0.6 0.6 1.4 2.8 2.8 1.4 0.8 0.6 0.9 0.7

Diverter round duct for valve connection RRU-1 PaFloor/wall outlet round duct including cover grille

RRU-2 + AG/... Pa

Plastic flat duct FK140Number of pipes per cord 1 or 2 1 1 1 1 1 1 1 1 1 1 1Resulting flow rate per pipe m3/h 21 21 21 28 28 28 22 23 40 40 22Length of the L cord m 8.0 11.0 4.0 2.0 9.0 7.0 1.0 1.0 4.0 3.5 3.5Specific pressure drop R Pa/m 0.6 0.6 0.6 0.9 0.9 0.9 0.6 0.7 1.7 1.7 0.6Pressure drop RxL Pa 4.8 6.6 2.4 1.8 8.1 6.3 0.6 0.7 6.8 6.0 2.1Connect flat duct-distribution box FKV140-1 PaElbow 90° vertical FKB140-1 Pc. 1.0 1.0

Pa/pc 1.5 0.5Pa 1.5 0.5

Elbow 90° horizontal FKB140-2 Pc. 1.0 1.0Pa/pc 1.1 1.1

Pa 1.1 1.190 ° horizontally bent flat ducting, bending radius 400 mm

Pc. 1.5 1.5 1.5 1.0 1.0 2.0 0.5 0.5 1.0 0.5Pa/pc 0.9 0.9 0.9 1.7 1.7 1.7 1.0 3.4 3.4 0.9

Pa 1.4 1.4 1.4 1.7 1.7 3.4 0.5 1.7 3.4 0.590 ° vertically bent flat ducting, bending radius 200 mm

Pc.Pa/pc

PaDiverter DN125 flat duct FKU 140-1 Pa 1.8 1.8 1.8 2.0 2.2 7.2 7.2 2.0Floor/wall outlet round duct including cover grille

FKU 140 + AG/...

Pa 3.6 3.6 3.6

Total components (round / flat)90 ° connector flat duct - pipe RRB75 Pa 4.1 4.1 4.1 7.2 7.2 7.2 3.8 4.3 1.6 1.6 3.8Sound absorber element SDE PaTotal pressure drop single resistance Z Pa 11.6 11.0 11.0 20.5 21.9 22.5 10.6 11.5 13.9 17.4 10.9Total pressure drop in cord RxL+Z Pa 18.4 18.3 14.1 23.5 33.6 32.4 11.9 13.0 21.3 25.8 13.7Valve type (ZU125, DV125, AV125 etc.)1)

1) The cover grille is already taken into account for in the floor/wall outlet pressure drop

DV125

DV 125

DV 125

DV 125

DV 125

AV 125/K

DV 125

DV 125

Pressure drop of the desired valve in neutral position2), incl. Filter

2) Neutral position: special valve open, poppet valve s=0 mm

Pa 3.0 3.0 3.0 3.5 4.0 5.8 12.5 3.5

Total pressure drop Pa 21.4 21.3 17.1 23.5 33.6 32.4 15.4 17.0 27.1 38.3 17.2Balancing Pa 12.2 12.3 16.5 10.1 0.0 1.2 22.9 21.3 11.2 0.00 21.1Valve position mm open open open open open open open openQuantity of rings to remove on throttle element

VKD 2 2 1 5 3)

3) No flow rate limiter

10 0 1 6 3) 0

Table 93 Example calculations for planning the pressure drop p (values rounded to one decimal place)

Children’s room

Bedroom ground floor

Living space ground floor


1st upper floorChildren’s room

2nd upper floorParents upper floor

Living room ground floor

WC ground floor

Kitchen ground floorBathroom

first floor

Storage room first floor

HRV2-... – 6 720 818 999 (2015/12) 111

10 Sample design

10.3.2 Sizing the main ductsFor sizing the main duct, the total flow rate from the distribution box VK160 is calculated using the ventilation device. Then, on the supply air side, the pressure drop of the outdoor air is added; on the extract air side the pressure drop of the exhaust air is added. The EPP pipe is used between the device and air distribution box. We recommend using a silencer with both the supply air and extract air sides.For the example design the pressure drop calculation of the main ducts is shown in Table 94 ( page 112).

The total pressure drop for the ventilation system is calculated by the sum of the parts connected in series. For the supply air fan, the pressure drop of the cord with the least pressure in the duct system is provided with supply air with the main duct and main duct with outdoor air. The exit air fan must overcome the pressure loss of the cord with the least pressure in the duct system extract air as well as the main duct extract and the main duct exit air.The total pressure drop with approx. 51 Pa for the supply air fan and approx. 50 P for the extract air fan can be found in Table 95 ( page 112).

Pressure drop calculation main ducts - sample design

Description Abbreviation SU AU EX FOFlow rate m3/h 147 147 147 147Diameter DN mm 160 160 160 160Flow velocity m/s 2 2 2 2Length of the EPP channel pipe1)

1) Including the length of the optionally available silencer

DEPP m 1.5 2 1 1Specific pressure drop EPP pipe Pa/m 0.4 0.4 0.4 0.4Pipe elbow 90° BEPP pcs. 1.5 1 1 1

PA / pcs 0.4 0.4 0.4 0.4Pressure all of pipework Pa 1.2 1.2 0.8 0.8Electric or hydraulic reheater bank set HRE125, HRE160,

HRW125, HRW160Pa – – – –

Distribution box VK160 Pa 1.7 – 1.7 – Outdoor-/exhaust air element DN125/DN160

WGE125, WGE160 Pa – – – –

Weather louvre WG160/1, WG160-2 Pa – 13.5 – 9Roof outlet DDF160/1 Pa – – – – Pressure drop sum main duct Pa 2.9 14.7 2.5 9.8Table 94 Pressure drop calculation

Total pressure drop SU AU EX FODuct system Pa 33.6 – 38.3 – Main duct Pa 2.9 14.7 2.5 9.8Total pressure drop Pa 51.2 50.6Table 95 Total pressure drop main duct

HRV2-... – 6 720 818 999 (2015/12)112

10 Sample design

10.4 Floor plan with ventilation installation

Fig. 183 Floor plan, ground floor with ventilation installation

EX Extract airAU Outdoor airDV125 Design valveAV125/K Extract valve kitchenDI Hallway, overflow currentEG Ground floorFO Exit airHWR Utility roomKÜ KitchenSD SilencerÜS Overcurrent under door gapÜZ Overflow zoneVK160 Distribution box WC Toilet WG160/1 Weather louvre WO Living spaceZI RoomSU Supply air

[1] DV1250 rings on VKD removed, valve position on

[2] DV1251 ring on VKD removed, valve position on

[3] AV125/K6 rings on VKD removed, valve position on



[6] DV1251 ring on VKD removed, valve position on

WG 160/1AU

WG 160/1

SD

SD

VK160

VK160

FO

HWR6,71 m²

AB 40 m3/hAB 23 m3/h

ZU 21 m3/h

ZU

ZU 42 m3/h

AB 22 m3/h

AB

WC5,02 m²

KÜ10,2 m²

WO28,96 m²

ZI12,12 m²

DI14,25 m²ÜZ

ÜS

ÜS

ÜS ÜS

ÜS

EG 1 2 3 4

56

6 720 816 821-53.1O

SU

SU

EXEXEX

SU

EX

EX

HRV2-... – 6 720 818 999 (2015/12) 113

10 Sample design

Fig. 184 Floor plan, attic with ventilation installation

EX Extract airABST Storage roomBA BathroomDG AtticDV125 Design valveEL ParentsFKB140-2 Elbow 90 ° horizontalFKU140-1 Diverter DN125 flat ductFKU140-2 Floor/wall outlet flat ductFL Corridor overflow zoneKI 1/2 Children 1/2RRB75 90° adapter flat - round duct

FK140-RR 75ÜS Overcurrent under door gapÜZ Overflow zoneSU Supply air

[1] DV125 with FKU140-1 no VKD valve position on

[2] DV125 with FKU140-1 0 rings on VKD removed, valve position on

[3] FKU140-210 rings on VKD removed

[4] FKU140-2no VKD

[5] FKU140-25 rings on VKD removed

FKU 140-1 FKU 140-1 FKU 140-1

FKU 140-1FKU 140-1

AB 22 m3/h

ÜZÜS

ÜS

ÜS

ÜS

ÜS

ZU 28 m3/h

ZUZU

ZU 28 m3/h

ZU 28 m3/h

AB 40 m3/h

AB

ABRRB 75

RRB 75

RRB 75

KI 111,95 m²

BA11,95 m²

EL11,81 m²

ABST4,69 m²

FL7,86 m²

KI 211,81 m²

DG

1

5

23

4

6 720 816 821-52.1O

SU

SUSU

SUSU

EX

EX

EX

EX

HRV2-... – 6 720 818 999 (2015/12)114

10 Sample design

10.5 Total pressure drop and selection of residential ventilation units

For selecting the residential ventilation unit the highest total pressure drop between supply and extract air is the deciding factor. In this example design the pressure drop is higher than the supply air at 51.2 Pa. With the significant total pressure drop of 51.2 Pa the required residential ventilation unit is chosen with a nominal flow rate of 147 m³/h.The required flow rate must be within the control range of the nominal ventilation (stage 3) depending on the calculated pressure drop.

10.6 Appliance details for the sample designFor the selected device Logavent HRV2-230 with a flow rate of 147 m³/h the operational setting should be ventilation stage 3 ( (2) in Figure 185 with curve for nominal ventilation). The electrical power consumption of the device can be found in Figure 37 ( page 35). The power consumption of the control is taken into account in this process. The setting for the required fan output is made by assigning the corresponding speed during adjustment and commissioning of the system.

Fig. 185 Operational setting ventilation stage 3 for nominal ventilation, ventilation device Logavent HRV2-230

p Static pressure increaseV Air flow rate[A] Design field for the whole application area [B] Design field for ventilation stage 3 (100 %)[1] System curve with the four ventilation stages in application area A[2] Ventilation stage 3 on the example of a system curve. This point represents the flow rate for the nominal

ventilation

p / Pa

00 50 100 150 200 250 300 350 400

50

100

150

200

250

300

6 720 816 821-55.1O V / m3/h.

1

2

147

51,2

B

A

.

HRV2-... – 6 720 818 999 (2015/12) 115

11 Appendix

11 Appendix

11.1 Copy template for sizing the flow ratesTotal heated area ANE m2

Average room height mHeated air volume ANE × h m3

Supply air flow rate per person (not under 20 m3/h) m3

Number of persons (planned) – Total outdoor air flow rate per person m3/hTotal outdoor air flow rate ( Formula 1 page 103) m3/hTotal extract air flow rate (sum extract air) m3/hTotal outdoor air flow rate ( Formula 2 page 103) m3/hNominal ventilation m3/hDamp proofing (min. WschV) ( Formula 7 page 103) m3/hDamp proofing (under WschV) ( Formula 8 page 103) m3/hReduced ventilation ( Formula 9 page 104) m3/hIntensive ventilation ( Formula 10 page 104) m3/hVentilation unitInfiltration ( Formula 6 page 103) m3/hFlow rate, ventilation system m3/hTotal air change 1 hTable 96 Sizing the flow rate centralised ventilation (information, infiltration factor page 103)

Splitting factor fRLiving room 3.0 (0.5)Bedroom and nursery 2.0 (1.0)Dining room, guest room and study 1.5 (0.5)Table 97 Splitting factor for supply air flow rate

Extract air volumes to be maintainedVAB

in m3/hUtility room, WC, cellar, supply room 25Kitchen, bathroom, shower 45Table 98 Minimum extract air flow rates to be maintained

HRV2-... – 6 720 818 999 (2015/12)116

11 Appendix

Determination of the extract air volume for each room

Determination of the supply air volume for each room

Extract air flow rate

Floor surface area

Average room height


Air change-over

Extract air room A H V Lw = V/(A × H) Valvesin m3/h in m2 in m in m3/h in 1/h –

TotalTable 99 Extract air flow rate central ventilation

Splitting factor

Floor surface area

Average room height


Air change-over

Supply air room fR A H V Lw = V/(A × H) Valves – in m2 in m in m3/h in 1/h –

TotalTable 100 Supply air flow rate central ventilation

HRV2-... – 6 720 818 999 (2015/12) 117

11 Appendix

11.2 Copy documents for pressure drop calculation air duct

DescriptionAbbreviatio

nSupply and extract air SU SU SU SU SU SU EX EX EX EX EXFlow rate m3/hPipe RR75Number of pipes per cord 1 or 2Resulting flow rate per pipe m3/hLength of the L cord mSpecific pressure drop R Pa/mPressure drop RxL PaDistribution box connection pipe Pa90 ° bent pipe bending radius 150 mm Pc.

Pa/pcPa

Diverter round duct for valve connection RRU-1 PaFloor/wall outlet round duct including cover grille

RRU-2 + AG/...

Pa

Plastic flat duct FK140Number of pipes per cord 1 or 2Resulting flow rate per pipe m3/hLength of the L cord mSpecific pressure drop R Pa/mPressure drop RxL PaConnect flat duct-distribution box FKV140-1 PaElbow 90° vertical FKB140-1 Pc.

Pa/pcPa

Elbow 90° horizontal FKB140-2 Pc.Pa/pc

Pa90 ° horizontally bent flat ducting, bending radius 400 mm

Pc.Pa/pc

Pa90 ° vertically bent flat ducting, bending radius 200 mm

Pc.Pa/pc

PaDiverter round duct for valve connection FKU140-1 PaFloor/wall outlet round duct including cover grille

FKU140 + AG/...

Pa

Total components (round / flat)90 ° connector flat duct - pipe RRB75 PaSound absorber element SDE PaTotal pressure drop single resistance Z PaTotal pressure drop in cord RxL+Z PaValve type (ZU125, DV125, AV125 etc.)1)

1) The cover grille is already taken into account for in the floor / wall outlet pressure drop

Pressure drop of the desired valve in neutral position2), incl. Filter

2) Neutral position: special valve open, poppet valve s = 0 mm

Pa

Total pressure drop PaBalancing PaValve position mmQuantity of rings to remove on throttle element VKDRemarks

Table 101 Planning pressure drop p

Children’s room

Bedroom ground floor



1st upper floorChildren’s room

2nd upper floorParents upper floor

Living room ground floor

WC ground floor

Kitchen ground floor

Bathroom first floor

Storage room first floor

HRV2-... – 6 720 818 999 (2015/12)118

11 Appendix

11.3 Copy template for pressure drop calculation main ductsDescription Abbreviation SU AU EX FOFlow rate m3/hDiameter DN mmFlow velocity m/sLength of the EPP channel pipe1)

1) Including the length of the optionally available silencer

DEPP mSpecific pressure drop EPP pipe Pa/mPipe elbow 90° BEPP pcs.

PA / pcsPressure all of pipework PaElectric or hydraulic reheater bank set HRE125, HRE160,

HRW125, HRW160Pa

Distribution box VK160 PaOutdoor-/exhaust air element DN125/DN160

WGE125, WGE160 Pa

Weather louvre WG160/1, WG160-2 PaRoof outlet DDF160/1 Pa

Pressure drop sum main duct PaTable 102 Pressure drop calculation

Total pressure drop SU AU EX FOUnderfloor duct PaMain duct PaTotal pressure drop PaTable 103 Total pressure drop

HRV2-... – 6 720 818 999 (2015/12) 119

11 Appendix

11.4 Fire safety class certificate B1 for EPS interior construction of the ventilation device

Fig. 186 6 720 816 821-39.1O

HRV2-... – 6 720 818 999 (2015/12)120

11 Appendix

11.5 List of abbreviationsAbbr. MeaningEX Extract airALD Outdoor air ventsAU/AUL Outdoor airAV Extract air valveAZ Branch pieceBG Deflection partDDF Roof outletDnW Sound level differentialEFH Detached houseEnEG Energy Savings Act [Germany]EnEV German Energy Saving RegulationsEPE Expanded polyethyleneEWT Geothermal heat exchangerFAV Filter extractFC Floor/wall outletFIR Flexible ventilation pipeFK Flat ductingFL Humidity controlFL/FO Exit airGL Nominal ventilation (basic ventilation)HRE Electric heater bankHRV2-... LogaventHRW DHW heater bankHWR Utility roomIL Intensive ventilationInf InfiltrationLw Air changeMBO Example building codeMFH Apartment buildingML Reduced ventilation (minimum ventilation)R’w Level of noise attenuationSD Absording duet ...VK Distribution boxWG Weather louvreWGE Outdoor-/exhaust air elementWRG Heat recoveryWschV Thermal Protection Order [Germany]SU Supply airZU Supply air valveTable 104 List of abbreviations

HRV2-... – 6 720 818 999 (2015/12) 121

Index

Index

AAir circuit ................................................................... 98Air distribution box VK160 ......................................... 63Air flow rate through infiltration

Supply and extract air system Logavent HRV2-... 103

BBlower door ................................................................. 4

CCombustion equipment in conjunction with

ventilation appliances....................................... 18, 97Condensate discharge ............................................... 96Cooker hoods....................................................... 96–97Copy documents

Pressure drop calculation.................................... 119Pressure drop calculation underfloor ducts ........ 118Sizing the flow rate.............................................. 116

DDevice design.................................................... 102, 107Device filter................................................................ 19Display symbols ......................................................... 37Domestic hot water heating battery HRW125/160 .... 47Ducts

Fire protection..................................................... 101General Information............................................... 52Heat Insulation....................................................... 52Overflow vents..................................................... 100Sound insulation.................................................... 99

EEnergy savings ............................................................. 6EPP pipework material............................................... 53

FFilter..................................................................... 19–20Fire protection ......................................................... 101Flat duct for flooring FK140....................................... 71Flat ducting system.................................................... 60

Air distribution box VK160..................................... 63Diverter DN125 flat duct FKU140-1 ....................... 75Elbow 90° horizontal ............................................. 74Elbow 90° vertical.................................................. 73Flat duct for flooring FK140................................... 71Floor/wall outlet FKU140-2.................................... 79Floor composition(detached houses).................... 61

Fresh air intake .......................................................... 56

GGeneral design information ....................................... 95General requirements for ventilation systems ........... 95

HHome ventilation

Central and supply and extract air heat recovery.... 7General basic principles.......................................... 4

HRE electric heater bank ........................................... 44Humidity control ...................................................... 103

IInstallation location ............................................ 96, 107

LLevel of humidity ......................................................... 4List of abbreviations ................................................ 121Logavent HRV2-...

Curves ................................................................... 32Electrical power consumption............................... 35Equipment overview .............................................. 11Function ................................................................ 10Technical Data....................................................... 27Ventilation control ................................................. 15

MMain line

EPP pipework material .......................................... 53Roof outlet without thermal bridges DDF160/1.... 57Silencer SD............................................................ 59Thermal bridge free outdoor-/exhaust air elements WGE125/160 .......................................... 56Wall outlet with no thermal bridge WG160/1........ 58

Mould formation .......................................................... 4

NNavigation key............................................................ 37

OOperating data........................................................... 37Overflow vents......................................................... 100

PPressure drop calculation.......................................... 99

Flooring ducts ..................................................... 110Main duct............................................................. 112

Pressure loss markup with F7 device filters.............. 20

RRegulations ................................................................ 94Roof outlet without thermal bridges DDF160/1 ........ 57Round duct system

Set of seal and fixationt RRD75............................. 70Diverter DN125 round duct RRU75-1 .................... 69Double female connector for round duct RRV75-2 ................................................................. 70Floor/wall outlet round duct RRU75-2................... 79Round duct RR75... ............................................... 67

HRV2-... – 6 720 818 999 (2015/12)122

Index

SSample design ......................................................... 105

Device design ...................................................... 107Floor plan ............................................................ 105Flow rate central ventilation with Logavent HRV2-... ............................................... 108Ground floor with ventilation installation (CAD plan) ........................................................... 113Loft with ventilation installation (CAD plan) ....... 114Main duct sizing................................................... 112Pressure drop calculation.................................... 112Pressure drop calculation underfloor ducts ........ 110Sectional view ..................................................... 106Sizing and layout cables ...................................... 110Sizing flooring ducts............................................ 110Sizing the air volume ........................................... 107

Silencer SD ................................................................ 59Sizing

Ducts ................................................................... 110Example design for a detached house................. 105Flooring ducts....................................... 110, 113–114Loft with ventilation installation.......................... 114Main duct............................................................. 112Systems, devices ................................................. 102Ventilation installation ground floor .................... 113

Sizing air lines............................................................ 99Sizing the air volume ............................................... 107Sizing the flow rate

Air flow rate through infiltration.......................... 103Central ventilation ............................................... 108Logavent HRV2-... ................................................ 108Splitting the air flow rate..................................... 104Total air flow rate through the ventilation unit.... 103Total outdoor air flow rate................................... 102Total outdoor air flow rate for calculation........... 103Total outdoor air flow rate for humidity control.. 103Total outdoor air flow rate for nominal ventilation ............................................................ 103

Sound insulation........................................................ 99Sound values Logavent HRV2-... ................................ 36Splitting the air flow rate

Extract air flow from the room ............................ 104Supply air flow rate into the room....................... 104

TTechnical data....................................................... 40, 43Thermal bridge free outdoor-/exhaust air

elements WGE125/160.......................................... 56

VValves

Ceiling diffusor valve AVD...................................... 91Valve design DV125 ............................................... 88Extract valve Standard AV125................................ 84Kitchen extractor valve 125/K ............................... 92Supply valve widethrow ZUW125 .......................... 90Supply valve Standard ZU125................................ 83

Ventilation appliances as EC versions ....................... 96Ventilation appliances as hygiene versions................ 95Ventilation control

Device filter ........................................................... 19Ventilation exceptions ............................................... 97

WWall outlet with no thermal bridge WG160/1............. 58Windowless rooms ..................................................... 96

HRV2-... – 6 720 818 999 (2015/12) 123

6 72

0 81

8 99

9 (2

015/

12)

Sub

ject

to te

chni

cal m

odifi

catio

ns.

Bosch Thermotechnik GmbHSophienstrasse 30 - 32, 35576 Wetzlar

www.buderus.com

Documents

Technical guide for contractors Logavent HRV2 · 2017-05-31 · For hygiene reasons and comfort requirements, this must be increased. This can either be done through extensive window