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How Blower Door Assisted Air Sealing Helps Find Leaks

Using a blower door--a device that sucks the air out of your house to simulate an especially windy day--is the best way to identify where your house leaks. For many of us, a thousand little pin pricks may add up to a hole in your house the size of a window left open 24 hours a day, 365 says per year. 

By using a blower door in coordination with air sealing, we can identify the biggest leaks and get them sealed.  A gneral rule of thumb is 1 sq inch = 10 cfm at cfm 50.

This video from Green Building Advisor shows how it's done. 

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