How Long Does a Blower Door Test Take and What’s Involved?

A blower door test usually takes 30–60 minutes. A technician installs a fan in an exterior door, measures how much air leaks out, identifies problem areas, and gives you a same-day report. It’s quick, accurate, and ensures your home meets code while improving efficiency and comfort.

If you’ve never had a blower door test done before, it can sound more complicated than it is. The good news? It’s a straightforward process that doesn’t take up your whole day.

How Long Does It Take?

Most blower door tests are completed in 30 to 60 minutes. Larger homes or commercial buildings may take a bit longer, but for the average residential project, you can expect us to be in and out quickly.

What’s Involved in the Test?

  1. Setup – Our technician installs a temporary frame with a powerful fan in an exterior doorway. This creates a controlled way to measure airflow.
  2. Pressure Test – The fan pulls air out of the building, lowering the pressure inside. This makes air leaks easier to detect.
  3. Measurement – Using specialized gauges, we measure how much air is leaking through gaps, cracks, and unsealed areas.
  4. Inspection – As the test runs, we identify the biggest sources of air loss so you know exactly where improvements can be made.
  5. Results – You’ll get a clear report showing whether your building meets code requirements and what your numbers mean in plain English.

Why It Matters

Blower door tests aren’t just a box to check for code compliance—they help ensure your building is energy-efficient, comfortable, and safe. A tighter home means lower utility bills and better indoor air quality.

Quick, Accurate, and Hassle-Free

With Middle Tennessee Blower Door, you’ll have results the same day and a technician who explains everything clearly. Schedule your test today and take the guesswork out of code compliance.

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We are RESNET Certified Energy Raters who provide blower door & duct leakage tests to home owners and builders in the Tennessee area.