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2018 Code changes moved out to 2/1/2021 .
Make sure to review energy credit information and note that the true volume will not be used per new code, volume will be figured off of Square footage and a ceiling height of 8.5'.
What is a blower door test ?
A blower door is a powerful fan that mounts into a frame that is placed in the opening of an exterior door. The fan pulls air out or pushes air into the building. It will either pressurize the building or depressurize the building. Air will be pulled through or pushed out any unsealed penetrations in the building. The test determines the air infiltration rate of tightness of the building.
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