Test blower door form 2026

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The document outlines the procedure and results for a Residential Building Air Leakage Test, commonly known as a Blower Door Test. It includes details such as permit information, house specifications, testing methodology, and compliance with the 2015 Washington State Energy Code. The test measures air changes per hour at a pressure of 50 Pascals to assess the building's air leakage rate, ensuring it does not exceed the code limit of 5 ACH. The document also specifies conditions for testing and requires certification from a technician.

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Click ‘Get Form’ to open the test blower door form in the editor.
Begin by entering the Permit Number and House Address or Lot Number in the designated fields. Ensure accuracy for proper documentation.
Fill in the City and Zip Code to specify the location of the property being tested.
Input the Conditioned Floor Area in square feet and the Age of the house. This information is crucial for calculating air changes.
Select a source for your data by circling either Estimated, Plans, or Measured based on how you obtained your information.
Record your Blower Door Test Result as ACH50 and CFM@50Pa, using the provided formula if necessary.
Indicate any applicable ring type by circling Open, A, B, or C. Then provide details about Blower Door Fan Location and Weather Conditions.
Complete the certification section by filling in Company Name, Technician Name, and signing with date and phone number.

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Got questions?

We have answers to the most popular questions from our customers. If you can't find an answer to your question, please contact us.

How hard is it to pass a blower door test?

It is estimated that 50% of newly constructed homes will fail the blower door or air-tightness test. Most blower door test failures occur because of a lack of understanding of what is necessary to create a continuous air barrier system.

What is the formula for the blower door test?

Lets use an example house that is 25 wide by 40 long by 10 high. This home has a volume of 10,000 cubic feet. Performing a blower door test on this structure produced a result of 167 CFM. To calculate the ACH50 number, we use the formula (CFM50 x 60 minutes)/volume.

How to do a blower door test yourself?

Confirm that all open-flame areas are extinguished and dampers are closed. Create an airflow path. Turn off any gas appliances. Mount the blower door into one of the exterior openings. Take an outdoor pressure reading. Turn on the fan and run the test. Inspect for leaks. Make repairs.

How is a blower door test performed?

During this test, a calibrated fan is installed in an otherwise sealed door or window, while all the other openings to the exterior are closed. When the fan is turned on, it creates a pressure difference between the outside and the inside.

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