By Randy Williams | September 29, 2022. Air-sealing penetrations made to accommodate ductwork is key to passing a code-required blower-door test. In 2012, the International Energy Conservation Code (IECC) started requiring residential construction pass an air leakage–rate test, better known as a blower-door test. Let’s use a fictional blower-door test as an example of how much information CFM50 can supply. I’ve calculated a home’s volume at 15,000 cubic feet, 4600 square feet of surface area, and the blower door measures 1000 CFM at the test pressure of 50 pascals. Vay Tiền Nhanh Ggads.

what is a blower door test