Depressurizing a home (creating negative pressure) is generally easier than pressurizing it in American residential construction because kitchen exhaust dampers open more readily to outflow than to inflow, and building paper/house wrap often have untaped bottom seams that prevent inflow but allow outflow.
factualpending
Speaker
Unidentified Speaker — Home Pressure Effects of Unbalanced ERV, Ventilating Dehumi… [7nhXP3v5Zy0]Evidence Quote
“to depressurize a home is generally easier with the way we construct homes in America than to pressurize a home and it has to do with the way that we um the dampers that are in place on your kitchen exhaust hood for example close when you pull on it but it opens when you push on it [5:45]”
Source
Home Pressure Effects of Unbalanced ERV, Ventilating Dehumidifier, or Supply-Only Ventilation— Home PerformanceCreated: 8/13/2026, 3:25:18 AM
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