What is the commonly recommended minimum air exchange rate for residential buildings?

The commonly recommended minimum air exchange rate for residential buildings is 0.35 air changes per hour. This rate is generally based on the need to maintain indoor air quality while ensuring sufficient ventilation for occupants.

Achieving this exchange rate helps to remove indoor air contaminants, manage humidity levels, and provide a comfortable living environment. It balances the need for fresh outdoor air with energy efficiency, as excessively high air exchange rates can lead to increased heating and cooling costs. While specific recommendations may vary based on factors such as climate, building design, and occupancy, 0.35 air changes per hour is widely recognized as a baseline for effective ventilation in residential applications.