The Passive House standard requires maximum air changes per hour (ACH50) of 0.6 or less—less than one air change per hour—making it far more stringent than building codes in the 2021 IECC, Washington state, Canada, or the U.S. Department of Energy's Zero Energy Ready Home standard.
factualpending
Speaker
Matt FerrellEvidence Quote
“for a building to meet the ultra-efficient criteria that defines a Passive House, its air changes per hour must max out at 0.6”
Created: 8/10/2026, 10:59:40 PM
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