Blower Door Test:
Blower door tests are used to measure the air tightness level of
building envelopes, diagnose and demonstrate air leakage problems,
estimate natural infiltration rates, estimate efficiency losses from
building air leakage, and certify construction integrity.
The blower door is a powerful fan that is mounted 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. Since leakier houses
require more airflow to induce a given pressure difference, blower
doors can measure the relative leakiness of a house.
A blower door test will measure failures in air boundaries,
failures that left uncorrected will continue to leak both air and
dollars. This test is usually performed by a certified Home Energy
Rater.
To view at a glance how the HERS Index and all the various tests play a role in the FGBC, NAHB and ENERGY STAR certification programs Click Here
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