Proudly serving Western Washington since 2016
Serving Western Washington

Energy Code
Compliance.

Blower Door Testing NW provides independent, third-party blower door and duct leakage testing for new and existing homes across Western Washington. We serve Olympia to Bellingham—including Tacoma, Seattle, Bellevue, Kirkland, Everett, and surrounding areas in Pierce, King, Snohomish, Thurston, and Whatcom counties.

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BPI Certified
48hr Scheduling
BPI technician performing blower door test on new construction home in Seattle

Comprehensive Services

We provide independent, third-party testing for new and existing homes across Western Washington including Pierce, King, Snohomish, Thurston, and Whatcom Counties.

Blower Door Testing

We perform blower door (aka air leakage) tests for single and multi family buildings. We have BPI certified technicians who will not only provide the test results and post the required certificate but also document the findings in the event that the test does not pass. This saves you time and money, making it easier to identify and remedy areas which are causing the failure.

  • Certified Results
  • Fast Turnaround

Duct Leakage Testing

We offer high-quality inspections for ductwork for homes with forced air or air conditioning. For duct tests, our technicians seal off and depressurize the ventilation system. Then with specialized equipment, they determine how much air pressure is escaping. These duct leakage tests ensure that your system is properly sealed and energy efficient.

  • Certified Results
  • Fast Turnaround

Pre-Consultation

Don't miss your closing date due to a failed blower door test. We offer pre-test consultation to help you address and identify the areas that can lead to test failure. Correcting these items before sheet rock can help to avoid costly repairs once the house is in the finished stage and ready for final inspection.

  • Avoid costly mistakes
  • Catch issues early

Why Choose Blower Door Testing NW?

Independent, third-party blower door and duct leakage testing for Washington State Energy Code compliance (2021 WSEC R402.4.1.3).

Modern Equipment

Best and most updated testing equipment.

Fast Response

48hr scheduling to keep your project moving.

Comprehensive Reports

Complete test certificates and documentation.

Frequently Asked Questions

What is a Blower Door Test?
Blower door testing is a scientific way to test the air leakage of any given structure. By depressurizing the building and measuring the rate at which air infiltrates the building envelope.
What is a Duct Leakage Test?
Duct leakage testing is a systematic way to test the energy efficiency of ductwork within homes. By sealing off and depressurizing the ductwork the technician uses specialized equipment to measure the airflow through the system.
How much does a test cost?
Pricing can vary depending on square footage, number of units, and location. We offer wholesale and volume pricing — please call 425-312-3914 for quote.
Is testing required?
Air leakage testing is required for new construction and many additions and multifamily projects when specified by your local jurisdiction. As of March 15, 2024, the 2021 Washington State Energy Code (WSEC) requires single-family homes and townhouses to meet 4.0 ACH @50 Pascals or less. Multifamily (R-2) buildings have a different metric (0.25 cfm/sq ft of enclosure area @50 Pa). We'll help you schedule and document the test results for inspection.
What is Washington R402.4.1.3?
R402.4.1.3 is the Washington State Energy Code section that sets air leakage testing requirements. It mandates a maximum of 4.0 ACH @50 Pascals.

Ready to Schedule Your Test?

Pricing varies by square footage and location. We offer wholesale and volume pricing. Contact us today for a quote.

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