Guide to ASTM E779 Building Pressurization
(Blower Door) Testing
What Is Blower Testing?
Testing consists of a variable speed fan with a built-in flow measuring sensor which will show the amount of wind blew or drew with equal force at all sides of the budling:
Fans can be temporarily sealed into a single exterior doorway or multiple doorways.
Multiple fans can be used to test large multi-story buildings.
Testing is assisted by thermography and smoke tracer pens to identify breached locations or specific air leakage locations.
What Does It Accomplish?
New Construction (Identifies air infiltration and correct deficiencies):
Testing is performed after installation of the weather resistive barrier, roofing, and fenestrations.
Commercial/Government Existing/Occupied Buildings:
Whole-building pressurization testing provides a scientific approach to identifying and controlling air infiltration or air leaks in buildings.
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Doorway Configurations
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Apparatus and Equipment
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Leak Detection
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