For a specific airtight home with a blower door test of 290 CFM50, 3000 square feet, and 47000 cubic feet of air volume, achieving a 3 Pascal positive pressurization requires 44 CFM of unbalanced ventilation (more supply than exhaust).
factualpending
Speaker
Unidentified Speaker — Home Pressure Effects of Unbalanced ERV, Ventilating Dehumi… [7nhXP3v5Zy0]Evidence Quote
“let's do my house if we had a blower door test of 290 which is my home's blower test for 45 000 47 000 cubic feet of air within my 3 000 square foot home um and to depressurize or pressurize the home to three pascals let's just say we're going to need 44 CFM of unbalanced [3:40]”
Source
Home Pressure Effects of Unbalanced ERV, Ventilating Dehumidifier, or Supply-Only Ventilation— Home PerformanceCreated: 8/13/2026, 3:25:18 AM
My Notes
Loading notes...