A blower door is a large fan that is mounted into an outside door frame that measures the air leaks (drafts) of the house. The blower door helps find the air leaks by depressurizing the house (blowing indoor air outside).
Why is the Blower Door Important? The blower door is hooked up to sensors inside and outside of the house and also to a computer. The computer program based on information from the sensors creates a report that measures how many air exchanges your home has per day. Your home breathes air into your house and out of your house. This is healthy for you and your family. But if your home breathes too much, it is costing your family money. Each air exchange must be reheated and recooled. If your home should ideally have 10 air exchanges a day, but actually has 14 air exchanges a day, you’re heating and cooling 4 extra air exchanges per day! After air sealing comes energy savings!
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