This five part series looks what an air leakage test of a typical house might look at. In this part, we take a look at a duct leakage to outdoors test. In some cases, this is more important than a total duct leakage test, as this test narrows down the duct leakage to only the energy lost to the outdoors.

Retrotec discusses RESNET duct testing code, as well as offering rules of thumb, and answering audience questions.