What is a Blower Door Test: Everything You Need to Know

Written by

Dumitru Nicolaescu

Updated:

January 8, 2025

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What Is A Blower Door Test

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Measure the air leakage: The test measures the air leakage compared to other homes at 50 Pa, which is the standard pressure used in blower door testing. This measurement helps assess the home's airtightness relative to other properties.
Infrared pictures: The blower door test also involves taking accurate infrared pictures. Due to negative pressure, analysts can detect not only air infiltration but also air leaks that may be heated or cooled by the interior air. These images provide valuable insights into the areas that require attention.
Locating and sealing air leaks: The test helps find the worst air leaks so that they can be sealed effectively. By identifying these problem areas, homeowners can take targeted measures to improve energy efficiency.
Determining ventilation requirements: The blower door test calculates the minimum ventilation levels required for your home. Proper ventilation is essential to maintain indoor air quality and prevent the buildup of pollutants.
Recommendations for improvements: Based on the test results, energy professionals provide homeowners with recommendations for improvements. These may include insulation, air sealing, and upgrades to ventilation systems to optimize energy efficiency.