A ventilating dehumidifier unit rated at 350 CFM at zero water column pressure but only 280 CFM at 2.2 inches water column (realistic ductwork pressure) with 70 CFM from outside and 210 CFM from inside would only be able to pressurize a home with blower door test of 600 CFM50 to 2 Pascal, making it insufficient for most homes seeking pressurization.
causalpending
Speaker
Unidentified Speaker — Home Pressure Effects of Unbalanced ERV, Ventilating Dehumi… [7nhXP3v5Zy0]Evidence Quote
“at 2.2 inches in water column which is probably pretty reasonable we have less than 300 CFM a flow we'll call it 280 [8:22]”
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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