For Air Exchange Rate we have terms and definitions in 3 topics. The topics are Air Quality, Carpet and Environment.

Air Exchange Rate (Air Quality)

The rate at which outside air replaces indoor air in a space. Expressed in one of two ways: the number of changes of outside air per unit of time air changes per hour (ACH); or the rate at which a volume of outside air enters per unit of time - cubic feet per minute (cfm).

Air Exchange Rate (Carpet)

Expresses in two ways: 1. The speed (number of times) outdoor air replaces indoor air expressed in air changes per hour (ACH). When there is little infiltration, or natural or mechanical ventilation, the air exchange rate is low and pollutant levels can increase. 2. The number of times the ventilation system replaces the air without a room or area within a building.

Air Exchange Rate (Environment)

The rate at which outside air replaces indoor air in a given space.

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