Blower Door Tests
Multiple blower door tests were performed by independent professionals over the course of the project with different equipment and under different ambient conditions. The first blower door test performed shortly after acquisition showed infiltration / exfiltration of over 5700 CFM at 50 Pascals on an building that was approximately 40% smaller. Subsequent blower door tests resulted in ranges well below the Passivhaus Institut standard, namely, in the .35 and less ACH at 50 Pascals range. Current infiltration/exfiltration approximates 200 CFM with 1 stdev +/- 25 CFM at 50 Pascals.
When a builder follows best practices and uses Passivhaus Institut certified products low ACH can easily be achieved. Low ACH translates directly into lower energy demand all else equal which translates directly into substantially lower CO2e and PM 2.5.
