How Much Does a Blower Door Test Cost? [2026 Data]

In 2026, the national average cost of a blower door test is $325. Most homeowners pay between $200 and $450, with the cost driven by home size, number of units, and add-on services such as thermal imaging or duct sealing. This test helps you identify where your home is losing conditioned air so you can seal those leaks and improve efficiency.

Blower Door Test Cost by Home Type: How Each Affects the Price

Certified blower door testers typically charge flat rates per home, but your home type directly shapes the final cost, with prices ranging from $200 to $450 for a single-family home up to $600 or more for multi-family properties. Homes with multiple units require additional blower fans and more labor time to install and monitor them, which drives costs higher.

The table below shows how costs vary by home type:

Single-Family Home

A standard one-story or two-story single-family home is the most straightforward blower door test scenario, with costs ranging from $200 to $450. Your pro only needs to install a single blower fan and prepare one set of doors, windows, and vents, making this the least labor-intensive option.

They’ll also have to do the following to set up a “closed home” situation:

• Close and lock all exterior doors

• Close and lock all windows

• Open all interior doors

• Turn gas appliances to "pilot"

• Close vents and HVAC dampers

Duplexes

A blower door test for a duplex typically costs $400 to $800, reflecting the added work of preparing two separate units and installing and monitoring two blower fans. Your pro will also spend additional time writing up two separate reports after testing is complete.

Apartment Complexes

Multi-unit properties require a custom quote, but costs typically push over $800 and can reach into the thousands, with most multi-family buildings averaging $250 to $350 per unit. Each apartment requires its own blower fan installation and monitoring, so total cost scales directly with the number of units in the building.

What Is the Purpose of a Blower Door Test?

A blower door test identifies exactly where your home is losing air, and at an average cost of $325 (typically $200 to $450), it can save you money by directing sealing efforts where they matter most rather than guessing. The test works by fitting a door with a powerful fan that depressurizes your home to reveal differences in air pressure, and local energy audit companies follow up with a detailed report of their findings.

That report may also include pricing options for sealing or caulking sources of air leaks, helping you understand the full scope of next steps before spending money on repairs to air leaks in ducts or wall openings.

Why You Should Hire an Air Conditioning Pro

Although you can find some videos and tips online that show you how to do a blower test yourself, relying on a local air conditioning repair professional is the better choice. Professionals have the experience necessary to administer the test and generate accurate and useful results.

Here's why it's ideal to hire an air conditioning pro

Hiring air conditioning repair professionals who are also certified to do blower door testing will provide multiple advantages, including:

• They have the equipment necessary to generate useful results.

• Certified pros provide verified measurements that can help you qualify for energy-efficiency incentives.

• Professionals can read the results accurately to pinpoint the locations of any leaks.

• Experts can do the test in 30 to 60 minutes, which is faster than most DIYers.

• Once the pros diagnose the problems, they can immediately take steps to fix them.

• DIYers may struggle to understand the true meaning of results like 1ACH or 2ACH, but pros know exactly what these results mean.

• Pros understand the importance of preparing the building for the test, such as opening all interior doors.

• When hiring a pro, you don't have to rent equipment or figure out how to use it correctly, as you do with a DIY job.

If you want to DIY some steps before a pro does a blower door test

As a homeowner, you can speed up the process a bit by taking steps to help the professionals, including:

• Fix areas that have obvious air leaks

• Lock exterior doors and windows

• Open every interior door, including closets

• Close all ductwork vents

• Shut down all natural gas appliances

• Turn off the air conditioner

• Close your fireplace damper and doors

• Turn off all exhaust fans

• Test for asbestos before doing the blower door test

Cost of Common Add-Ons

Several add-on services pair naturally with a blower door test and can help you act on the results, with costs that vary depending on the service and scope.

• A home energy audit, which costs $200–$700 on average, is used to understand your home's energy efficiency.

• Door weather stripping, which costs $130–$430per door. Weatherstripping can help create a tight seal around your door, preventing air leakage.

• Window caulking, which costs $50–$70per window. Similar to weather stripping, caulking helps seal windows.

• Checking air ducts for leaks or sealing your ducts costs an average of $350–$2,250, respectively.

• Thermal imaging costs $150–$400. This is included in some blower tests and helps determine exactly where the leaks originate. It also locates sites of other thermal issues.

How to Save Money on Blower Door Tests

Unfortunately, a blower test is not a project where you can save large amounts of money. The doors themselves are only produced by a few companies, and there isn't much you can do to reduce labor hours.

If you're looking to save a bit, you need to get a little creative. Try the following:

• Ask for referral bonuses or discounts.

• Schedule during the off-season or in a quiet period of your pro's schedule.

• Look for home energy efficiency rebates from your state or city.

• DIY fix any leaks before the test.

How Angi Gets Its Cost Data

Home is the most important place on earth, which is why Angi has helped more than 150 million homeowners transform their houses into homes they adore. To help homeowners with their next project, Angi provides readers with the most accurate cost data and upholds strict editorial standards. We extensively research project costs to develop the pricing data you see, so you can make the best decisions for you and your home. We rely on reputable sources, including the U.S. Bureau of Labor Statistics, academic journals, market studies, and interviews with industry experts—all to ensure our prices reflect real-world projects. 

Want to help us improve our cost data? Send us a recent project quote to [email protected]. Quotes and personal information will not be shared publicly.