Blower Door Testing
​Blower door testing is a vital diagnostic method used to determine how airtight a building is. In Massachusetts, it’s required for most new residential constructions and for renovation projects where proper air sealing is necessary to satisfy energy code requirements. At HERS Rating, our team performs comprehensive blower door tests to pinpoint air leaks and verify that your building is operating at peak efficiency.
WHY IS BLOWER DOOR TESTING IMPORTANT?
​A blower door test uses a high-powered fan installed in an exterior doorway to measure how much air leaks out of a building. By pressurizing the home, the test uncovers areas where air is escaping—often around windows, doors, and other penetrations. Fixing these leaks is essential for several reasons:
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Energy Efficiency: Reducing uncontrolled air infiltration lowers energy usage, helping homes stay warmer in winter and cooler in summer.
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Code Compliance: Blower door testing is required for many construction and renovation projects to meet Massachusetts energy codes and Stretch Code standards.
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Comfort: Properly sealing leaks improves temperature control, resulting in a more comfortable indoor environment.
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Air Quality: Limiting air leakage helps manage humidity, reduce drafts, and contribute to healthier indoor air quality.
