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5.3003.21 Air Flow—Low Rise

Topic:

Forced Air

Subtopic:

System Assessment and Maintenance

Desired Outcome:

Air flow is properly tested

For supporting material, see Referenced Standards.

Multifamily Homes

Title	Specification(s)	Objective(s)
5.3003.21a Validate air distribution system installation	System will be checked for existence of specified system components	Confirm installed system Become familiar with system components Verify system readiness for testing
5.3003.21b Testing equipment selection	Measurement equipment will be selected so that design value will be within the accurate range of the measuring device Equipment will be capable of accurately measuring +/- 10% in general case Measurement equipment will be calibrated and field checked in accordance with manufacturer recommendations	Ensure accurate measurements of airflow rates
5.3003.21c Test air handler unit	Equipment testing will check for: Proper operation (programmed schedule/sequence of operation) Proper rotation All measured values will be recorded and compared against design specifications Fan flow will be adjusted to meet design specification	Verify performance of air handler system
5.3003.21d Total air flow	Total system airflow will be measured in accordance with ANSI ANSI American National Standards Institute, www.ansi.org / ACCA ACCA Air Conditioning Contractors of America, www.acca.org Standard 5 or ANSI ANSI American National Standards Institute, www.ansi.org / ASHRAE ASHRAE American Society of Heating, Refrigerating and Air-Conditioning Engineers, www.ashrae.org Standard 111 and adjusted to meet design requirements Examples of acceptable methods include the following: Temperature rise test Air flow plate (e.g., TrueFlow® Air Handler Flow Meter) Fan pressurization device (e.g., Duct Blaster®, DuctTester) Hot wire anemometer	Ensure equipment operates as designed Ensure equipment operates efficiently Ensure equipment provides comfort Ensure equipment operates safely Ensure equipment is durable
5.3003.21e External static pressure	External static pressure will be in accordance with manufacturer specifications	Ensure equipment operates as designed Ensure equipment operates efficiently Ensure equipment provides comfort Ensure equipment operates safely Ensure equipment is durable
5.3003.21f Pressure drop: coil	Pressure drop across cooling coils will be in accordance with manufacturer specifications	Ensure equipment operates as designed Ensure equipment operates efficiently Ensure equipment provides comfort Ensure equipment operates safely Ensure equipment is durable
5.3003.21g Pressure drop: filter	Pressure drop across filter will be in accordance with manufacturer specifications	Ensure equipment operates as designed Ensure equipment operates efficiently Ensure equipment provides comfort Ensure equipment operates safely Ensure equipment is durable
5.3003.21h Balance of room flow: new ductwork	Airflow will be measured in accordance with ANSI ANSI American National Standards Institute, www.ansi.org / ACCA ACCA Air Conditioning Contractors of America, www.acca.org Standard 5 or ANSI ANSI American National Standards Institute, www.ansi.org / ASHRAE ASHRAE American Society of Heating, Refrigerating and Air-Conditioning Engineers, www.ashrae.org Standard 111 and adjusted to meet design requirements Examples of acceptable methods include the following: Air flow will be measured at each register and compared to load calculation to ensure proper air flow delivery Adjustments will be made to fan speed, dampers, and registers until design specifications are met	Ensure equipment operates as designed Ensure equipment operates efficiently Ensure equipment provides comfort Ensure equipment operates safely Ensure equipment is durable
5.3003.21i Supply wet bulb and dry bulb	Supply wet bulb and dry bulb air temperatures will be recorded	Ensure equipment operates as designed Ensure equipment operates efficiently Ensure equipment provides comfort Ensure equipment operates safely Ensure equipment is durable
5.3003.21j Return wet bulb and dry bulb	Return wet bulb and dry bulb air temperatures will be recorded	Ensure equipment operates as designed Ensure equipment operates efficiently Ensure equipment provides comfort Ensure equipment operates safely Ensure equipment is durable
5.3003.21k Temperature rise: gas and oil furnaces only	Temperature rise between the supply and return will be in accordance with manufacturer specifications	Ensure equipment operates as designed Ensure equipment operates efficiently Ensure equipment provides comfort Ensure equipment operates safely Ensure equipment is durable
5.3003.21l Final balance	Final air flow and/or pressure will be measured, confirmed, and recorded at air handler and registers Airflow will be measured in accordance with ANSI ANSI American National Standards Institute, www.ansi.org / ACCA ACCA Air Conditioning Contractors of America, www.acca.org Standard 5 or ANSI ANSI American National Standards Institute, www.ansi.org / ASHRAE ASHRAE American Society of Heating, Refrigerating and Air-Conditioning Engineers, www.ashrae.org Standard 111 and adjusted to meet design requirements	Provide acceptable thermal comfort, energy efficiency, and indoor air quality
5.3003.21m Occupant/property manager education	Occupant/property manager will be: Instructed on proper operation and maintenance procedures Educated on value and need for recommissioning requirements Property manager will complete a 30-hour OSHA OSHA U.S. Occupational Safety and Health Administration, www.osha.gov safety education course	Ensure continued operation of equipment at design performance levels