Topical Terminology > Ventilation Rate
Ventilation Rate
For Ventilation Rate we have terms and definitions in 2 topics. The topics are Air Quality and Environment.
Ventilation Rate (Air Quality) 
The rate at which indoor air enters and leaves a building. Expressed in one of two ways: the number of changes of outdoor air per unit of time (air changes per hour, or "ach") or the rate at which a volume of outdoor air enters per unit of time (cubic feet per minute, or "cfm").
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Ventilation Rate (Environment)
The rate at which indoor air enters and leaves a building. Expressed as the number of changes of outdoor air per unit of time (air changes per hour (ACH), or the rate at which a volume of outdoor air enters in cubic feet per minute (CFM).
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