To calculate air cleaning rate in CFM for a given space, multiply square footage by ceiling height and divide by 60 to find the CFM needed for one complete air change per hour.
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“divide that number by 60 to find out how many CFM we'd have to run in order to clean the air one time per hour”
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Home Ventilation Advice from HVAC Researcher Jeffrey Siegel: How Many CFM is Ideal?— Home PerformanceCreated: 8/13/2026, 4:55:15 AM
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