Blower Door Testing Near Silver Spring, Hyattsville, Gaithersburg

We create comfortable homes by fixing leaky ones

See how a blower door test is performed to test for air leakage within a home.

One of the quickest and most affordable energy-saving projects is to seal cracks and openings around your house, but first you have to find the leaks. Some air leakage is obvious because you can feel it, such as a draft under an exterior door. Other leaks are less obvious.

Air leakage can be contributing to your uncomfortable home and high energy bills. Before making efficiency upgrades, we recommend having a blower door test performed during your home energy audit to determine exactly how your home is using and losing energy.

To schedule your home energy audit and blower door test, call us at (410) 867-1202 or click the button below. We are the area’s trusted home energy contractor serving Hyattsville, Silver Spring, Gaithersburg and surrounding Maryland areas.

How leaky is your house? A blower door uses a fan to create negative pressure in your house. This causes outside air to be pulled in through gaps and cracks, making them easier to locate & fix.

What are the benefits of finding & fixing air leaks in your home?

Less energy consumption & lower utility costs.
Helps prevent moisture condensation problems.
Reduces uncomfortable drafts caused by cold air leaking in from outside.
Blower door test helps determine how much ventilation is needed to improve indoor air quality.

How a blower door test works

A blower door test helps locate air leaks in a house and is typically performed before and after air sealing. A blower door uses a special fan that’s mounted in the frame of an exterior door to pull air out of the house, lowering the air pressure inside. The pressure difference between the air inside and outside the house forces the outside air in through all cracks and openings. While the fan is running, a technician will inspect each room for air leaks. A pressure gauge measures the pressure differences inside and outside the home and an airflow manometer measures the airflow. The data provided by the blower door test allows the technician to quantify the amount of air leakage in your home, as well as find any unsealed openings following air sealing work.

Schedule your blower door test today!

A blower door test can help determine areas of your home that need air sealing and more insulation. As a qualified home energy contractor, we can recommend and provide the best solutions for treating your home’s comfort and energy problems. We provide insulation upgrades and other home energy improvements in Maryland, including Rockville, Annapolis, Bowie, Bethesda, Upper Marlboro, Waldorf, Laurel.

For an accurate diagnosis of air leakage in your home, contact us today to schedule your blower door test and comprehensive home energy assessment!

Frequently Asked Questions About Blower Door Testing

How much does a blower door test cost in Maryland?

The cost of a blower door test in Maryland depends on the home’s size, testing requirements, and whether the service is performed independently or as part of a comprehensive home energy audit. Additional diagnostic testing may also affect the total cost. Homeowners can request an estimate from Complete Home Solutions to understand the testing options available for their property.

How is a residential blower door test performed?

During a blower door test, a technician installs a calibrated fan in an exterior doorway and uses it to create a controlled pressure difference between the inside and outside of the home. Specialized equipment measures the airflow needed to maintain that pressure, helping determine how much air is leaking through gaps and openings in the building envelope. The technician may also inspect areas where leaks are suspected.

When should I schedule a blower door test for my home?

A blower door test may be beneficial if your home has persistent drafts, uneven temperatures, high heating and cooling costs, or suspected air leaks. Testing can also be useful before insulation and air-sealing improvements to establish a baseline or afterward to measure how much air leakage has been reduced.

What is a good blower door test result for a house?

Blower door test results are commonly expressed as air changes per hour at 50 pascals of pressure (ACH50). A lower ACH50 generally indicates less air leakage, but an appropriate result depends on the home’s age, construction, climate, and applicable building requirements. A professional can interpret the measurements and determine whether additional air sealing or ventilation improvements are needed.

Can a blower door test find hidden air leaks in my home?

Yes. A blower door test can help identify air leakage that may not be noticeable during everyday conditions. When the home is depressurized, technicians can use diagnostic methods to locate leaks around attic penetrations, recessed lighting, windows, doors, plumbing openings, and other areas where conditioned air may escape.

Is a blower door test the same as a home energy audit?

No. A blower door test specifically measures air leakage through the home’s building envelope, while a comprehensive home energy audit evaluates broader factors affecting energy use and comfort. Depending on the assessment, an energy audit may include blower door testing, insulation evaluations, HVAC assessments, and recommendations for improving overall home performance.