Minneapolis Blower Door Testing, The #1 Company in the Business

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Diagram of a blower door. The parts of the blower door are labeled as follows: exterior door frame (around the outside edge of the door), temporary covering (over the surface of the door), and adjustable frame (just inside the exterior door frame). An air pressure gauge, a small vertical rectangle with three round gauges inside, is alongside of the door. The top gauge is connected by a tube to the temporary covering, and the bottom two gauges are connected to a fan sitting at the bottom of the door. The caption reads: 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 STARŪ Program, require a blower door test (usually performed in less than an hour) to confirm the tightness of the house.

 

Text Box: Blower Door Tests Professional energy auditors use blower door tests to help determine a home's airtightness. These are some reasons for establishing the proper building tightness: ·          Reducing energy consumption due to air leakage ·          Avoiding moisture condensation problems ·          Avoiding uncomfortable drafts caused by cold air leaking in from the outdoors Making sure that the home's air quality is not too contaminated by indoor air pollution. How They Work A blower door is a powerful fan that mounts into the frame of an exterior door. The fan pulls air out of the house, lowering the air pressure inside. The higher outside air pressure then flows in through all unsealed cracks and openings. The auditors may use a smoke pencil to detect air leaks. These tests determine the air infiltration rate of a building. Blower doors consist of a frame and flexible panel that fit in a doorway, a variable-speed fan, a pressure gauge to measure the pressure differences inside and outside the home, and an airflow manometer and hoses for measuring airflow.    

What is a "Blower Door" test?