How Much Does a Blower Door Test Cost? [2025 Data]

A blower door test costs around $325 on average, but you might pay between $200 and $450, depending on a few different factors. This test is a great way to know whether your home is leaking precious heat or air conditioning, and the results can help you pinpoint those leaks and seal them. In this guide, we’ll discuss blower door test costs and some cost factors that can influence your total.

Blower Door Test Cost by Home Type

While certified blower door testers typically charge flat rates per home, the type of home can influence the cost. Not only will homes with multiple units require additional blowers, but the labor time to install them will increase as well.

Single-Family Home

Expect to pay somewhere within the range of $200 to $450 if you have a standard one-story or two-story home.

This scenario requires the least amount of work for your professional. They’ll only have a single door to install a blower fan on, although 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

If you have a duplex, your blower door test will typically range from $400 to $800.

Blower door tests cost more for duplexes because they require more work from your professional. Not only will they have to go through two units to shut exterior doors and windows and close exterior vents, but they’ll also need to install two separate blower fans and monitor both throughout the test. After the testing is completed, they’ll also spend more time writing up two reports.

Apartment Complexes

If you have a multi-unit property, you’ll likely need to get a custom quote, but the cost will likely push over $800 and could reach into the thousands.

Basically, the more apartments or units you have in your building, the more time your professional will have to spend going through and preparing each space. Each unit will also likely require a separate blower fan installed, which adds to the labor time for installation and monitoring.

On average, expect to spend between $250 and $350 per unit for multi-family homes and apartment buildings.

What Is the Purpose of a Blower Door Test?

A blower door test is highly valuable because it will identify where your home's air is escaping from. Once you know the location of air leaks, you can fix the problem and save money in all that wasted energy. 

The average cost for a blower door test is around $325, though it may range between $200 and $450. It might seem unnecessary to spend this much on a diagnostic rather than putting that money toward sealing the air leaks in ducts and around wall openings, but a blower door test can help you find where your money will go the furthest and can determine if you have an issue in the first place. Ultimately, paying for a blower door test can often end up saving you money on sealing costs and heating and cooling costs.

The cost of a blower door test covers the actual testing process that involves fitting a door with a powerful fan to suck air out of your house as a way to gauge differences in air pressure. In addition, local energy audit companies provide detailed reports of their findings. Lastly, your report may include some pricing options for sealing or caulking sources of air leaks in your home.

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 tes

Cost of Common Add-Ons

There are a few other small projects you may want to consider adding on during or after your blower door test, including: 

• A home energy audit, which costs $200 to $700 on average, to understand your home’s energy-efficiency.

• Door weather stripping, which costs $130 to $430 per door. Weather Stripping can help create a tight seal around your door, preventing air loss.

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

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

• Thermal imaging, which costs $150 and $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.