Updated: Nov 29, 2020
A blower door is a technical device utilizing a calibrated fan which will induce a pressure differential in a home. By measuring how much air is moved to maintain that pressure, the blower door technician can report the standardized air leakage rate. Having also calculated the air boundary volume, he can report air changes per hour. Local code amends the IECC 2015 requirement to 5ACH50, meaning 5 air changes per hour at 50 Pascals.
WHOLE-HOUSING VENTILATION TEST