Indoor Air Quality and Demand Controlled Ventilation Air Quality and Demand... · 2019-03-05 · HONEYWELL ANALYTICS – What’s Up April 12, 2012 3 Ventilation •The reasons we

Honeywell Analytics

Indoor Air Quality and Demand Controlled Ventilation

Don Olson: Sr. Product Manager, Honeywell Analytics

HONEYWELL ANALYTICS – What’s Up April 12, 2012

2

Agenda

Commercial Building HVAC Systems

• Ventilation

• Design Considerations

• Challenges

• Options

Honeywell Analytics

• IAQPoint2


3

Ventilation

•The reasons we ventilate buildings are:

-To ensure a healthy atmosphere for occupants by diluting indoor contaminants and providing fresh air

-To pressurize the building positively to prevent unfiltered and unconditioned air from entering the building

-To provide cooling or heating and save energy

-To replace exhausted air (provide make-up air)


4

Design Considerations

• Zone, Floor, or Local Control

• Heating

• Cooling

• Fresh Air


5

Challenges

• Proper Ventilation

- Versus under or over ventilation

• Air Conditioning

- Heating or Cooling of air

• Sick Building Syndrome


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Challenges

ASHRAE 62.1 Ventilation for Acceptable Indoor Air Quality

• The purpose of this standard is to specify minimum ventilation rates and indoor air quality that is acceptable to human occupants

- Recommended ventilation rates:

Classrooms15cfm per person

Conference rooms: 15cfm per person

Office space and restaurants: 20cfm per person

Hospitals: 25cfm per person; 30cfm for operating rooms

Laboratories: 20cfm per person


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LEEDS

• Obtaining LEED Credits (Leadership in Energy and Environmental Design)

- Tied to ASHRAE 62.1 ventilation recommendations

LEED provides building owners and operators with a framework for identifying and implementing practical and measurable green building design, construction, operations and maintenance solutions.


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LEEDS

1 POINT: Increased Ventilation

• Requirements

- Increase breathing zone outdoor air ventilation rates to all occupied spaces by at least 30% above the minimum rates required by ASHRAE Standard 62.1.

1 POINT: Outdoor Air Delivery Monitoring

• Requirements

- Install permanent monitoring systems to ensure that ventilation systems maintain design minimum requirements.

- Configure all monitoring equipment to generate an alarm when the airflow values or carbon dioxide (CO2) levels vary by 10% or more from the design values via either a building automation system alarm to the building operator or a visual or audible alert to the building occupants.

1 POINT: Construction Indoor Air Quality Management Plan—During Construction

• Requirements

- Develop and implement an IAQ management plan after installation of all finishes and completion of building cleaning but before occupancy.


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Options

• Ventilate continuously

• Ventilate based on a schedule using a BAS

• Monitor indoor air quality and ventilate as needed (Demand Controlled Ventilation)


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Economizers

• Economizers use sensors, installed at various locations inside the rooftop unit, to monitor temperature and humidity levels inside and outside the building as well as CO2 sensor to monitor the level of Carbon Dioxide inside the building. This information is used to control a logic module/motor actuator which automatically adjusts the angle of the damper blades in the outdoor damper assembly to allow more or less outdoor air into the building, depending on conditions.

• When the outdoor temperature and humidity are mild, economizers save energy by cooling buildings with outside air rather than using refrigeration equipment to cool recirculated air.

• A properly operating economizer can cut energy costs by as much as 10% of a building's total energy consumption (up to 20 percent in mild, coastal climates), depending mostly on local climate and internal cooling loads.


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Economizers

• The JADE™ Economizer System is an expandable economizer control system, which includes Economizer Module (controller) with an LCD and keypad.

• A CO2 sensor can be added for Demand Control Ventilation (DCV).

• The module includes terminals for a CO2 sensor (for Demand Controlled Ventilation), a Mixed Air sensor, and an Outdoor Dry Bulb sensor.


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A Gas Monitoring System Can

• Reduce Energy Costs

• Improve Indoor Air Quality

• Enhance the Long-Term Health and Well-Being of People and Equipment

• Help a Building Run more Efficiently and Profitably

• Cost Savings (dependant on local energy rates)

- Demand controlled ventilation can reduce your energy consumption by 30-60% versus continuous or scheduled ventilation solutions


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Why Monitor for CO2?

High levels of CO2 can cause drowsiness and create an inefficient work environment for building occupants. To combat this problem, building managers may choose to run the ventilation system continuously, but this is an inefficient, costly practice.

With IAQPoint2 in place, the ventilation system can do its job appropriately and efficiently, to the benefit of your bottom line.

An economizer motor opens the outside air damper when levels exceed the set point


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Why Monitor for VOC?

Studies show a connection between the presence of VOCs and adverse health effects.

Commercial, educational and government buildings contain VOCs.

VOC Sources

• Organic odors, aerosols, disinfectants, cleansers (washrooms, kitchens)

• Paints, waxes, cleaning supplies, pesticides (janitorial closets)

• Copiers, printers, correction fluid, adhesives, permanent markers, photographic solutions (copier/printing rooms)

• Fuel cans, solvents, preservatives, automotive and vehicle products (warehouses, shipping areas)

• Formaldehyde carpets (offices and office areas)


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IAQPoint2

• Monitor CO2 or VOC (volatile organic compounds)

• Add Temperature and Relative Humidity

• Multicolor, touch screen display and user interface

• Configurable main display

• Multi-level password protection


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IAQPoint2

• Analog Units

-4-20mA or 0-10VDC, selectable

CO2 or VOC

Temperature

Relative Humidity

-Relay

-Display Optional

-Duct or Wall Mount

-For local control, can be interfaced to an economizer

• Digital Units

-BACnet or Modbus, selectable

CO2 or VOC

Temperature

Relative Humidity

-Temperature Adjustment, selectable

-Relay

-Display

-Duct or Wall Mount


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IAQPoint2 Wall Mount

• Easy to install -Universal back plate for global use

-Easy access to wiring terminals

-Wiring clearly identified

-+24VAC/VDC for global application

• Cover (with or without display)

• Configure at your desk with a back plate


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IAQPoint2 Duct Mount

• Same functionality and options as a wall mount unit.

• Duct Mount designed to IP54

• 4-way, selectable flow direction

• Excellent solution for averaging over an area


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Questions

Thank you for your time.

For more information on incorporating gas

monitoring for demand controlled ventilation, call the sales manager in your region or contact me

directly:

Donald Olson at 847-955-4801.

www.iaqpoint2.com

www.honeywellanalytics.com

http://www.iaqpoint2.com/

http://www.honeywellanalytics.com/


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Local Support

Gas Detection

1.800.538.0363

[email protected]

www.honeywellanalytics.com

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Indoor Air Quality and Demand Controlled Ventilation Air Quality and Demand... · 2019-03-05 · HONEYWELL ANALYTICS – What’s Up April 12, 2012 3 Ventilation •The reasons we