901 W Broadway Vancouver Hotel

901 W Broadway

Vancouver Hotel

Preliminary Mechanical Design Report

Prepared For:

Zeidler Architecture 640 8 Avenue SW, Suite 300 Calgary, AB, T2P 1G7

Prepared By:

Flow Consulting Group Inc. 1075 W Georgia St, Suite 1080 Vancouver, BC, V6E 3C9

Date: December 1st, 2020

Project No.: 18-141

901 W Broadway Hotel

Preliminary Mechanical Design Report Page i

Table of Contents

1 INTRODUCTION ................................................................................................. 1

2 REGULATIONS AND STANDARDS ................................................................... 1

3 GENERAL DESIGN PHILOSOPHY .................................................................... 1

4 MECHANICAL SYSTEM OVERVIEW ................................................................. 2

4.1 Mechanical systems being considered for this project: ............................. 2

4.2 Mechanical systems rejected for this project: ........................................... 2

5 THERMAL COMFORT AND VENTILATION REQUIREMENTS .......................... 3

5.1 Outdoor design temperature..................................................................... 3

5.2 Indoor design temperatures ..................................................................... 3

5.3 Indoor design ventilation .......................................................................... 3

5.4 Indoor design exhaust .............................................................................. 4

6 LEED REQUIREMENTS ..................................................................................... 4

6.1 Overview of Mechanical Points List .......................................................... 4

7 HVAC SYSTEMS ................................................................................................ 5

7.1 Heating/Cooling Systems ......................................................................... 5

7.2 Central heating/cooling options: ............................................................... 6

7.3 Mechanical Ventilation Equipment ........................................................... 6

7.4 Control Systems ....................................................................................... 7

7.5 Life Safety Systems ................................................................................. 8

7.6 Energy Conservation ................................................................................ 8

8 PLUMBING SYSTEMS ....................................................................................... 9

8.1 Storm Drainage System ........................................................................... 9

8.2 Footing Drainage System ......................................................................... 9

8.3 Sanitary Drainage System ........................................................................ 9

8.4 Domestic Water Supply System ............................................................. 10

8.5 Domestic Hot Water System .................................................................. 10

8.6 Plumbing fixtures .................................................................................... 10

7.6 Fuel Dispensing System ......................................................................... 10

9 BUILDING SERVICE CONNECTIONS .............................................................. 11


Preliminary Mechanical Design Report Page ii

9.1 Gas Service ........................................................................................... 11

9.2 Water Service ........................................................................................ 11

9.3 Sanitary Drainage .................................................................................. 11

9.4 Storm Drainage ...................................................................................... 11

10 FIRE PROTECTION SYSTEMS ........................................................................ 11

11 BUILDING AREA REQUIREMENTS ................................................................. 11

11.1 Preliminary estimates for each level of the building ................................ 11

APPENDIX A ................................................................................................................ 14

11.2 Major Mechanical Systems Schematic ................................................... 14

11.3 Multistack Unit Diagram ......................................................................... 15

12 APPENDIX B ..................................................................................................... 16

12.1 LEED Checklist (Provided by WSP - October 31, 2018) ......................... 17


Preliminary Mechanical Design Report Page 1

1 INTRODUCTION

901 West Broadway Hotel is planned to be a 12-story hotel in Vancouver. The following report is presented for the Client and third parties to understand the building mechanical systems, design criteria, operations and limitations. Opportunities for discussion, budget preparation and coordination with the structural, electrical, LEED and architectural features should be found in a timely manner to coordinate alterations to the proposed design. The project must be LEED gold certified which places a strong emphasis on energy efficient mechanical systems.

The following proposed building mechanical systems are subject to change based on feedback from project stakeholders.

2 REGULATIONS AND STANDARDS

HVAC, plumbing and fire suppression systems shall be designed in accordance with all authoritative and legislated codes and standards adopted at the time of design by various authorities, including the following:

• The Vancouver Building By-law 2019, Authority Having Jurisdiction (AHJ);

• The National Standard of Canada, CAN/CGA-B149.1-M95, Natural Gas Installation Code.

• The British Columbia Gas Safety Act and Regulations.

• The Worker’s Compensation Board of British Columbia, Occupational Health and Safety Regulations.

• The National Fire Protection Association 13-2013, Standard for the Installation of Sprinkler Systems.

• The National Fire Protection Association 14-2013, Standard for the Installation of Standpipe and Hose Systems.

• ASHRAE 90.1-2016 Energy Standards for Buildings Except Low-Rise Residential Buildings.

• ASHRAE 62.1-2010 & ASHRAE 62-2001 Ventilation for Acceptable Indoor Air Quality.

• ASHRAE 55-2010 Thermal Comfort Conditions for Human Occupancy.

• SMACNA, Guidelines for Seismic Restraints of Mechanical and Plumbing Piping Systems.

• LEED BD&C V4 Canada Green Building Council Reference Guide.

3 GENERAL DESIGN PHILOSOPHY

The HVAC system design shall incorporate the following criteria:



• Occupant comfort

• Energy efficiency

• Environmental quality

• Cost effectiveness

• Long term maintainability

• Simplicity in operation

4 MECHANICAL SYSTEM OVERVIEW

The mechanical and plumbing systems shall be designed in accordance with applicable building codes, good engineering practice and intended building occupancy.

Mechanical systems providing heating, cooling and ventilation will be studied in detail with considerations for LEED energy requirements, sound, location, and energy modeling.

4.1 MECHANICAL SYSTEMS BEING CONSIDERED FOR THIS PROJECT:

• Building heating/cooling source (Option “A”)

o 4-pipe water source heat recovery unit (Multistack Unit) with full capacity backup air source heat pumps located on roof

• Building heating/cooling source (Option “B”) – No Longer Considered

o Geothermal heat pumps with underground piping requiring a discovery phase from geotechnical consultants

• 4-pipe hot/chilled water fan coils to deliver the primary heating and cooling energy to zones

• Heat recovery ventilation (HRV) units zones to provide primary ventilation for building zones

• Rainwater collection system from building roof for laundry make-up water

• Water efficient plumbing fixtures

4.2 MECHANICAL SYSTEMS REJECTED FOR THIS PROJECT:

• Variable refrigerant flow (VRF) systems have some beneficial features with regards to energy efficiency, however they require specialized mechanics to repair and would have long piping runs that can lead to conflicts with refrigerant volume and life safety systems. These systems generally do not provide the excellent thermal comfort of water-based systems.

• Packaged terminal air conditioner (PTAC) systems are common in hotel projects, however they are not as energy efficient as systems that share



energy between building heating and cooling loads. They also tend to be noisy and are not suitable for high end hotels.

• Hybrid heat pumps, with heating water condenser coils & direct expansion cooling coils save on piping costs but are only more energy efficient in narrow bands of heating and cooling demands. It is anticipated that this building will not have the load profile required to outperform Option “A” or Option “B”.

• Gas boilers will likely exceed the greenhouse gas limits set by the AHJ.

• Electric boilers are less efficient than heat pump technology.

• Cooling towers require separate heating system which reduces efficiencies.

5 THERMAL COMFORT AND VENTILATION REQUIREMENTS

5.1 OUTDOOR DESIGN TEMPERATURE

The outdoor design temperatures contributing to envelop losses/gains are as follows:

Outdoor Temperatures Winter -7ºC

Summer DB +28ºC

Summer WB +20ºC

5.2 INDOOR DESIGN TEMPERATURES

The specific indoor climate design criteria required for the different occupancies are as follows:

Heating set points: Suites - 12am-8am 70°F, 8am-12am 72°F

Commercial – 7am-8pm 72°F, 8pm-7am 64°F

Corridors – 68°F

Cooling set points: Suites – 12am-8am 75°F, 10am-3pm 78°F, 3pm-12am 75°F

Commercial – 7am-8pm 75°F, night setback (some) 78°F

Corridors – 75°F

5.3 INDOOR DESIGN VENTILATION

Hotel Suites – 30 CFM minimum (ASHRAE 62-2001), otherwise .01 ppl/sqft @ 5 CFM/person plus .06 CFM/sqft (ASHRAE 62.1-2010)

Lobby/Reception - .03 ppl/sqft @ 15 CFM/person (ASHRAE 62-2001)

Lower corridors - .06 CFM/sqft (ASHRAE 62.2-2010)



Breakrooms - .05 ppl/sqft @ 5 CFM/person plus .12 CFM/sqft (ASHRAE 62.1-2010)

Offices - .007 ppl/sqft @20 CFM/person (ASHRAE 62-2001)

Luggage Rooms - .007 ppl/sqft @ 7.5 CFM/person plus .12 CFM/sqft (ASHRAE 62.1-2010)

Restaurant & Bar - .07 ppl/sqft @ 20 CFM/person (ASHRAE 62-2001)

Meeting/conference - 20 CFM/person (ASHRAE 62-2001)

Hotel Suite Corridors – 15 CFM/door (City of Vancouver)

Gymnasium - .04 ppl/sqft @ 20 CFM/person plus .06 CFM/sqft (ASHRAE 62.1-2010)

5.4 INDOOR DESIGN EXHAUST

Parkade Exhaust – 0.75 CFM/sqft (ASHRAE 62.1-2010)

Janitor/Trash/Recycling/Soiled Laundry – 1 CFM/sqft (ASHRAE 62.1-2010)

Public Washroom – 50/70 CFM/stall depending on usage rates (ASHRAE 62.1-2010)

6 LEED REQUIREMENTS

6.1 OVERVIEW OF MECHANICAL POINTS LIST

There are 5 prerequisite targets and 16 points distributed over another 9 target fields that are the responsibility of the mechanical discipline for this project. The current projection is 9 points (attainable), 5 points (possible) and 2 points that will not be pursued for a maximum of 14 / 16 points.

Refer to Appendix B for a description of the credits.

6.1.1 IPC INTEGRATIVE PROCESS (1/1 POINTS)

Mechanical has identified laundry cold water make up as an end use for the stormwater reuse. An additional end use remains to be evaluated.

6.1.2 WEP INDOOR WATER USE REDUCTION (0 POINTS)

Fixture target is 30% which will improve on the prerequisite requirement of 20%.

6.1.3 WEP BUILDING-LEVEL WATER METERING (0 POINTS)

Building-level water metering is standard in Vancouver.

6.1.4 WEC INDOOR WATER USE REDUCTION (2-4/6 POINTS)

Fixture target is 30% (2 points), additional 2 points may be found in stormwater re-use for laundry cold water make up, to be determined.



6.1.5 WEC WATER METERING (1/1 POINT)

Sub-metering of two water systems is feasible and desirable.

6.1.6 EAP BUILDING-LEVEL ENERGY METERING (0 POINTS)

Building-level energy metering is standard in Vancouver.

6.1.7 EAP FUNDAMENTAL REFRIGERANT MANAGEMENT (0 POINTS)

No CFC-based refrigerants are anticipated for this project.

6.1.8 EAC ADVANCED ENERGY METERING (1/1 POINT)

Credit can be achieved with DDC system.

6.1.9 EAC ENHANCED REFRIGERATION MANAGEMENT (1/1 POINT)

Refrigerant is anticipated to be R410A, which does not contribute to ozone depletion.

6.1.10 IEQP1 MINIMUM INDOOR AIR QUALITY PERFORMANCE (0 POINTS)

Design will meet the minimum requirements of ASHRAE 62.1-2010 or ASHRAE 62-2001, whichever is more stringent for the space.

6.1.11 IEQC ENHANCED INDOOR AIR QUALITY STRATEGIES (1-2/2 POINTS)

A supplier has been found for HRV’s with MERV 13 filters. Energy model results will show if increasing ventilation by 30% is achievable.

6.1.12 IEQC INDOOR AIR QUALITY ASSESSMENT (2/2 POINTS)

Credit is required by Vancouver rezoning requirements.

6.1.13 IEQC THERMAL COMFORT (1/1 POINT)

Building will be designed to comply with ASHRAE 55-2010. Guest rooms are not included in credit calculations.

6.1.14 IEQC ACOUSTIC PERFORMANCE (0-1/1 POINT)

Credit depends on type and location of mechanical systems.

7 HVAC SYSTEMS

7.1 HEATING/COOLING SYSTEMS

4-pipe fan coil units will regulate the temperatures within hotel suites, offices, meeting rooms, VIP lounge, corridors, lobby/reception, gym, and café. The restaurant will utilize perimeter heat/cool induction units and cooling fan coil units for the interior.

Electric baseboard heaters may heat stairwells and underground occupied parking areas such as elevator lobbies and may be added to exterior washrooms and storage rooms when cost effective and within LEED design parameters.



The parkade is planned to be unheated, as is the norm in the Vancouver climate.

7.2 CENTRAL HEATING/COOLING OPTIONS:

7.2.1 OPTION “A”

Majority of heating and cooling for this building will be accomplished with a 4-pipe heat recovery chiller/heater located on the roof. This unit will exchange heat between the heating water and chilled water loops as well as providing preheat for the domestic water system. When loads are unequal, the unit acts as an air source heat pump for the water systems.

Refer to Appendix A for equipment diagram.

7.2.2 OPTION “B”- OPTION NOT CONSIDERED UPON FURTHER REVIEW

Geothermal heat pump exchanging heat to the ground. This option requires coordination with geotechnical consultants before analysis of viability can resume. “Earth Tubes” exchanging ground energy with ventilation systems have also been considered, however, geothermal heat pump systems are much more efficient at geothermal energy exchange and distribution to the building.

Geothermal heat pumps would have the added value of freeing up roof space for other uses and limiting the potential for noise issues.

7.3 MECHANICAL VENTILATION EQUIPMENT

7.3.1 PARKADE LEVELS:

The parkade levels require two mechanical shafts, from grade to P3, on opposite sides of the building. The maximum size of the exhaust and supply shafts are estimated to be 44”X44”.

The parkade floor area shall be ventilated with supply, exhaust and transfer fans serving to reduce exposure to vehicle exhaust gases and ducted to the shafts.

Below grade stairwells shall be equipped with emergency fans capable of 1000 CFM per floor and ducted from the shafts, to be coordinated with building code consultant.

Elevator lobbies and spaces adjacent to the parking lots will be pressurized with make-up air fans with electric duct heaters ducted from the shaft. Electrical and mechanical rooms on these levels shall also be supplied with make-up air fans with electric duct heaters.

7.3.2 LEVEL 1 – RECEPTION LOBBY

All ventilation and exhaust requirements (except for laundry room) on this floor will be provided by an HRV (or combination of HRVs) balanced to serve requirements of the various spaces.

Proposed electric dryers (dependent on energy model) located in the laundry room will require separate exhaust ducting and an interlocked make-up air unit to



operate when dryers are on. Energy recovery options for the dryers are being considered.

7.3.3 LEVEL 2 – MAIN FLOOR

Ventilation to occupied areas on this level will be supplied by a proposed make-up air unit located on the balcony of level 4. Preliminary calculations indicate that most, if not all of the restaurant occupancy ventilation can be transferred to the kitchen exhaust system. Restaurant kitchen will be exhausted with an ecology unit directly to the building face to avoid ducting to the roof from level 2. Washrooms on this level will be directly exhausted. Future discovery of restaurant exhaust rates and occupancy schedule may affect system design and include provisions for HRV utilization.

7.3.4 LEVEL 3 – MEETING LEVEL

Meeting rooms will be ventilated with a shared HRV ducted to the building face and returned via transfer air to the washrooms/storage rooms.

Gym will be ventilated with an HRV ducted to the building face.

7.3.5 LEVEL 4:

VIP Lounge will be ventilated with an HRV ducted to the outdoor amenity.

7.3.6 LEVELS 4-12:

Corridors will be ventilated via a Make Up Air (MUA) unit on 12TH floor ceiling level, ducted through the mechanical shaft, and returned through transfer air from the Maid’s Rooms on each floor.

Hotel suites will be ventilated with individual HRVs ducted to fan coil units and returning from the bathrooms. (To be confirmed with Energy Modeller)

7.4 CONTROL SYSTEMS

A direct digital control (DDC) system with a modem for off site communication will be provided for the facility. Utilizing DDC system provides cost effective equipment control, energy management and system diagnostic by a centralized computer network.

The DDC system will incorporate CO2 or NO2 sensors, occupancy sensors, space temperature controls, and hotel suite card occupancy schedules.

7.4.1 PARKADE LEVELS

Parkade exhaust systems will be controlled by CO2 sensors.

Emergency stairwell pressurization systems will be controlled by the DDC emergency system, to be coordinated with the building code consultant.

Heating systems will be controlled by space thermostats.




HRVs will be controlled by DDC building schedule.

Heating/cooling systems will be controlled by space thermostats.


Proposed make-up air unit, ecology unit & bathroom exhaust fans will run 24/7, to be coordinated with restaurant occupancy schedule.

Heating/cooling systems will be controlled by space thermostats.


HRV serving the meeting rooms and washrooms shall be programmed to occupancy such that if one room is used the system will activate.

Gym HRV shall activate via occupancy sensor.

7.4.5 LEVELS 4-12

HRV serving the VIP lounge will be controlled by occupancy sensor.

7.5 LIFE SAFETY SYSTEMS

All life safety systems shall be designed to meet the B.C. Building Code requirements.

• Fire sprinkler system shall be designed to NFPA 13 or NFPA 13R requirements.

• Fire standpipes and hose systems will meet NFPA 14 requirements.

• Fire dampers shall be provided for all duct penetrations through fire rated separations.

• Fire stopping materials shall be provided for all pipe penetrations through fire rated separations.

• CO2 sensors will be installed in the parking levels and control the operation of the parkade supply/exhaust systems. Additional CO2 sensors will be installed in adjacent spaces where required by code.

• Each floor will be provided with a vent or operable window to aid in smoke control, to be coordinated with the building code consultant.

7.6 ENERGY CONSERVATION

The energy modelling report is attached in appendix B; with the following items to be utilized during design.

• CGBC LEED BD&C V4 Reference Guide.

• Water to water heat recovery with domestic hot water preheat capability (Multistack unit)



• Heat recovery ventilators (HRVs) providing the majority of ventilation

• Motors shall be high efficiency to meet ASHRAE 90.1 Standards for Energy Efficiency.

• All outdoor air filters shall be a minimum of MERV 13 and coils shall be designed for the lowest static pressure to reduce fan motors power.

• DDC control system shall provide monitoring and controllability. The system shall be able to provide energy management reports.

• Hotel suite HRVs shall be controlled by room occupancy sensors via card activation system.

8 PLUMBING SYSTEMS

8.1 STORM DRAINAGE SYSTEM

Storm water collected from the roof system will be diverted to the detention tank and filtered for use in laundry cold water make-up. Backup domestic cold water will ensure that the tank always contains enough water to service the laundry machines. Tank overflow, and other above grade drainage site will gravity feed to the city main (depending on tank location and design). Below grade drainage will be collected in a sump and pumped to the city main.

8.2 FOOTING DRAINAGE SYSTEM

A footing drainage system will be provided along exterior foundation wall footings. Underground water will be collected into a footing sump, and pumped to the city main.

8.3 SANITARY DRAINAGE SYSTEM

All above grade plumbing fixtures will drain by gravity to the city main.

All vent pipes will be collected and piped up to the roof, located away from any operable windows and air intakes.

Trap primers will provide water to all fixture p-traps with irregular usage to prevent dry traps.

Sanitary water from the parkade levels will be treated by an oil interceptor assembly before draining to the city main.

Sanitary water from the restaurant kitchen floor, café and waste/recycling room floor drains will be treated by a grease interceptor assembly before draining to the city main.



8.4 DOMESTIC WATER SUPPLY SYSTEM

Domestic hot and cold-water pipes will be provided to all the new plumbing fixtures with isolation valves for servicing. Zone isolation valves will also be provided for each suite. Domestic hot water return pipes will be branch on each floor to reduce water waste.

Pressure booster pumps and drawdown tanks will provide cold water to the upper floors and make-up water to the domestic hot water system.

Laundry cold water makeup will be provided by filtered water from the stormwater detention tank (proposed).

8.5 DOMESTIC HOT WATER SYSTEM

The proposed domestic hot water will be supplied at high pressure from the cold water drawdown tank. Make-up water will be preheated via heat exchange with the building heating water. Supplementary gas fired boilers or electric heating coils sized for full load redundancy will bring the hot water system to 140°F at the storage tanks. Choice of boiler system will depend on the results of the energy model. Additional on-demand electric booster heaters will increase the temperature where required for restaurant, café and laundry services.

8.6 PLUMBING FIXTURES

Water Closet – Dual flush low consumption water tank @ 1.12 gpf (30% reduction)

Urinal – Ultra low flow automatic flush @ 0.5 gpf (30% reduction)

Lavatory (public) – Low flow faucet @ 0.35gpm, 60 psi (30% reduction)

Lavatory (private) – Low flow faucet @ 1.54 gpm, 60 psi (30% reduction)

Kitchen Sink (private) – Low flow faucet @ 1.54 gpm, 60 psi (30% reduction)

Shower – Low flow pressure balancing shower valve @ 2.5 gpm (0% reduction)

*Shower reduction subject to change due to design coordination with project stakeholders

Clothes Washer (commercial) – CEE Tier 3A

*Hotel Clothes washer cold water to utilize storm water

Utility Sink - Low flow faucet (excluded from LEED targets)

Ice Machine – Water source heat pump utilizing building chilled water loop

7.6 FUEL DISPENSING SYSTEM

The fuel storage tank that will provide fuel for the backup generator will be located in the parking garage mechanical room, a fuel dispensing station will be



located on the main floor near back alley. To be coordinated with the electrical design consultant.

9 BUILDING SERVICE CONNECTIONS

9.1 GAS SERVICE

The natural gas main will be connected from the street to an outdoor gas meter then distributed to all gas-fired appliances. Size to be determined based on kitchen, domestic water and make up air requirements.

9.2 WATER SERVICE

Dual 6” ø (to be confirmed with sprinkler design) combined water service main will be connected from the City main on 2 adjacent streets to a pressure reducing station with water meter located in valve room at parking level 1 for domestic water and for fire standpipe and fire sprinkler system. Water consumption will be metered.

9.3 SANITARY DRAINAGE

A proposed 8”ø building sanitary sewer main will be connected to the city main.

9.4 STORM DRAINAGE

Roofs rain water and perimeter drainage will be piped to a storm detention tank and from there, to a proposed 8” ø connection to the city main. This item is to be coordinated with the civil engineer.

10 FIRE PROTECTION SYSTEMS

Sprinkler systems will be provided in accordance with NFPA 13 requirements and coordinated with the sprinkler engineer.

11 BUILDING AREA REQUIREMENTS

11.1 PRELIMINARY ESTIMATES FOR EACH LEVEL OF THE BUILDING

11.1.1 PARKADE LEVELS (THESE ROOMS MAY BE COMBINED OR SEPARATED AS REQUIRED)

Fire Pump requirements – 10’x16’ fire pump room is estimated for this project.

Water Entry Room – 15’x20’ room estimated for water entry station, domestic water booster pumps and drawdown tank.

Domestic Water Heating – 12’x20’ room estimated for heat exchangers, boilers and storage tanks.



Rainwater Detention Tank – A space capable of retaining ~ 30m3 is estimated at this time, to be confirmed and coordinated with geo/civil.


All Areas – Dropped ceilings to accommodate sanitary stack offsets, HRV ducting and FCU ducting.

Plumbing stacks & vents – Many plumbing stacks will be 6”ø on this level and require a furr-out or plumbing wall near the washrooms, recycling and office rooms.


All Areas – Dropped ceilings to accommodate sanitary stack offsets, MUA ducting and FCU ducting.

Plumbing stacks & vents – Many plumbing stacks will be 6”ø on this level and require a furr-out or larger plumbing wall near the washrooms, beside kitchen storage walls, offices and elevators.

Kitchen Exhaust – The kitchen exhaust duct is estimated to be ~ 25”x25” (based on 5000 CFM to be confirmed by restaurant) including duct wrap. The duct will slope at 2% from building exterior down to kitchen exhaust hood. An ecology unit located beside the men’s or women’s washrooms in the ceiling space will be required prior to exhaust.


All Non-Suite Areas – Dropped ceilings to accommodate sanitary stack offsets, HRV ducting and FCU diffusers.

Plumbing stacks & vents – Provide 6” plumbing walls for stacks above to drop below after offset. Furr-outs may be required for Boardroom, Meeting Rooms & Gym. Avoid plumbing in storage/prep & meeting support due to kitchen below. Some sanitary stacks may be 6”ø after consolidation on this level.

Room HRVs – Two (2) 1’x1’ bulkheads (shared supply/exhaust), extending from wall to room entry way, for every 2 or 3 suites. HRV located in closet, dropped ceiling, or corridor ceiling space; to be coordinated.

Room FCUs – Dropped ceiling in every room entry way, extending to start of living space.

11.1.5 LEVEL 4 – ROOMS & LOUNGE



VIP Lounge HRV – Located in ceiling space and ducted to exterior, size to be determined. May require closet or large bulkhead with access panels.



Level 2 MUA – 8’x15’ located on Level 4 outdoor amenity, beside room 408, and ducted to level 2.

11.1.6 LEVELS 5-12 – TOWER ROOMS



Bathrooms – Dropped ceilings in bathrooms to accommodate exhaust ductwork and sanitary piping.

Plumbing stacks & vents – Provide 6” plumbing walls for each bathroom group, no plumbing through corridor/party walls.

11.1.7 INTERIOR SHAFTS

4-pipe heating/cooling – 4’x1’ shaft with allowances for offset branches to floors.

Domestic cold/hot/return water – 3’x2’ shaft with allowances for offset branches to floors for both high pressure and low pressure systems.

Corridor Ventilation – 4’x2’ duct shaft required with additional space allowance for fire and balancing dampers.

11.1.8 ROOFTOP

Multistack unit (Option “A”) – 37.5’x14’ including clearances with no ceiling coverage.

Mechanical room (Option “A”) – 15’x15’ covered room with pumps and tanks associated with the multistack unit, ideally located over a mechanical building shaft.

Sanitary Vents – Require radius distances from air intakes, occupants and operable windows.

Corridor HRV – 7’x7’ plus access and ventilation clearances, ideally located over a mechanical building shaft.

Rainwater Harvesting – Rooftop construction shall be suitable to collect clear rainwater for future use. Rainwater leaders are currently anticipated to run inside the building through plumbing walls.



APPENDIX A

11.2 MAJOR MECHANICAL SYSTEMS SCHEMATIC



11.3 MULTISTACK UNIT DIAGRAM





12 APPENDIX B

12.1 LEED CHECKLIST (PROVIDED BY WSP - OCTOBER 31, 2018)

















Documents

901 W Broadway Vancouver Hotel