Since 2015, we've been providing high-quality home inspections and building diagnostics for our Bozeman and the Gallatin Valley area communities. RedPoint LLC provides blower door testing using RetroTec equipment. This diagnostic tool is used to evaluate the air tightness of a home and helps locate deficiencies in the air barrier.
1. What is a blower door test? A blower door test locates and measures the amount of air infiltration entering the home. A large fan is installed on an exterior door of the house and depressurizes the space. Exterior air through atmospheric pressure is then naturally forcing back into the house through “leaky” passageways.
Blower door testing, also known as Air Leakage Test or Air Tightness Test, is the process of measuring the amount of conditioned (heated or cooled) air leaking from a building through uncontrolled ventilation. A fan is installed into the external envelope of the building and supplies air into, or extracts air out of, the property creating a
Usually, a blower door test cost is included in the price of an audit, which is between $300 to $500. RetroFoam of Michigan is BPI certified, which means we have the knowledge and experience to perform blower door tests. We frequently perform blower door tests after we have insulated several areas of a home with foam insulation.
Testing for air leaks identifies problem areas in your home. A blower door test sucks the air out of a house, drawing in outside air through leakage points. At Dr. Energy Saver, we know where to find air leaks in your home. However, we also use some specialized equipment to get a complete picture of how your home is losing energy.
In new construction, the best time to conduct a blower-door test is after the house has been insulated but before the drywall is up. At this time, leaks will be easier to find and fix. When testing older houses, a blower door can help a contractor find and seal air leaks. That process is called “blower-door-directed air-sealing.”.
As an example, a home had a blower door test of 750 CFM and a calculated volume of 12,000 cubic feet. Using the formula, 750 CFM x 60 minutes / 12,000 cubic feet = 3.75 ACH50. This home would pass the blower door test in some areas of the country where the test result must be 5 ACH50 or less, but not in others where the requirement is 3 ACH50
Blower Door Testing can help you and also your family in many ways including: Less energy consumption & also lower utility costs. Helps prevent moisture condensation, dust, mold, mildew, and also breathing problems. Reduces uncomfortable drafts caused by cold, or also hot humid air, that’s leaking in from outside.
The test is also most effective when conducted throughout the entire building. Blower door test results aid builders and owners in the decision-making process. It helps determine: How much effort should be spent on sealing air leaks in comparison to windows or insulation. How much mechanical ventilation is needed to create good indoor air quality.
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how does a blower door test work
