Blower Door Testing

Blower door testing is utilized on buildings to measure the air leakage through its enclosure. 

Testing consists of fixing a calibrated fan system to a sealed door or window, while all other exterior openings remain closed. During this measured test, typically under negative pressure (a vacuum), air is pulled through the enclosure during an observed and measure test. This test determines how much unintentional air leakage the structure yields.  

Michigan energy code 2016 requires all new structures to have a passing blower door test (BDT) of 4 air changes per hour (ACH) with a structure depressurized to -50Pa or 4 ACH50.  

Blower door testing is critical in identifying the integrity of structures air tightness. Results of BDT determine a homes efficiency of conditioned spaces.  

Identifying and correcting air leakage creates a more airtight home is critical to it's longevity.