Labels:text | wheel | screenshot | bicycle OCR: Diagnostic Tools Testing the airtightness of a home using a special fan called a blower door can help to ensure that air sealing work is effective. Often, energy efficiency incentive programs, such as the DOE/ EPA ENERGY STAR Program, require a blower door test (usually performed in less than an hour) to confirm the tightness of the house. Exterior door frame Temporary covering Adjustable frame Air pressure gauge Fan
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