Air changes per hour measured via blower door test (envelope leakage rate) is distinct from air cleaning rate (filtration-based air change); these are commonly confused.

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Speaker

Host

Evidence Quote

“there's two there's air changes per hour 50 which is blower door metrics and then there's air x what do you call it I call it air cleanings”

Source

Home Ventilation Advice from HVAC Researcher Jeffrey Siegel: How Many CFM is Ideal?— Home Performance
Created: 8/13/2026, 4:55:15 AM

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