Definition
This standardized test measures house air leakage, identifying where outside air is sneaking in. It quantifies energy efficiency and guides sealing efforts.
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Blower door equipment depressurizes home while measuring air leakage. Cost is $300-600. Quantifies air tightness and identifies leaks for sealing. Results expressed in air changes per hour (ACH). Lower ACH indicates better air tightness. Smoke or scent testing identifies leak locations. Essential for energy efficiency assessment. Baseline testing tracks improvement. Code compliance verification. Reveals draft sources affecting comfort. Professional-grade equipment required.
Pro Tip
Request blower door test to quantify air leakage and target sealing.
Example
A blower door test identified significant air leaks leading to sealing improving efficiency 20%.