Blower Door Test in King Of Prussia, PA

Evaluate your home’s air leakage and achieve energy compliance with precise blower door test in King Of Prussia, PA. Our certified team helps homeowners, builders, and contractors locate air leaks, enhance indoor comfort, and meet all PA energy efficiency requirements.

What Is A Blower Door Test?

A blower door test checks the number of air changes per hour in your home, ensuring old air is replaced with new, clean air for a healthier environment. Frequent air replacement can harm energy performance, as each exchange requires reheating or recooling the air. Frequent air changes can cause drafts and discomfort from leaks, increasing the risk of indoor mold and condensation. A blower door test in King Of Prussia, PA enables early identification of air leaks, helping improve comfort, durability, and energy savings.

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How Is A Blower Door Test Conducted?

Before blower door test in King Of Prussia, PA, every exterior door and window is closed securely, while interior doors stay open to let air move evenly around the home. A central door to the outside is selected, and an adjustable aluminum frame with a fabric cover is installed there. Technicians use a calibrated fan mounted on the frame to bring the home’s interior to 50 Pascals, approximating a 20 mph wind on the walls.

As the fan removes air from inside, exterior air flows in through leaks and gaps in the building envelope. By employing a nanometer, we measure the variance between the fan’s pressure and the internal home pressure. These readings produce the air changes per hour (ACH) value, indicating both the home’s airtightness and efficiency within the PA climate.

What Is A Passing Blower Door Test Score?

Homes throughout King Of Prussia, PA are required to satisfy the 2015 International Energy Conservation Code (IECC) or the most current version enforced by local regulators. A result of 3 air changes per hour or less is generally required in most areas to confirm the home’s energy efficiency. When your blower door test in King Of Prussia, PA meets this requirement, you ensure energy efficiency and maintain compliance with building codes.

Why Do I Need A Blower Door Test?

In accordance with the IECC, the State of PA and various local authorities require blower door test for new or remodeled residential properties. We often work with home builders, contractors, and homeowners requiring blower door test in King Of Prussia, PA to meet local energy codes and obtain permit approval. A duct leakage test may also be performed when ductwork or HVAC equipment extends beyond the thermal envelope. Learn more about energy code compliance.

Homeowners experience real energy benefits from blower door test in King Of Prussia, PA. The fan’s depressurization highlights air leaks, helping identify inefficiencies that can be sealed for savings. A blower door test, typically lasting only a few hours, offers a long-lasting impact on your home’s performance, efficiency, and comfort across PA’ seasons.

How To Pass A Blower Door Test:

Anticipate potential air leaks before testing begins.
Apply an appropriate air barrier, such as Tyvek or Zip Sheathing, making sure every seam is correctly taped for maximum performance.
Ensure the insulation used meets the proper R-value and is well fitted throughout the structure’s building envelope.
Seal all penetrations in exterior walls using caulk or spray foam.
Ensure doors and windows are properly installed, caulked, and weather-sealed.
Properly seal all connections between conditioned and unconditioned zones, including basements, crawl spaces, and attics.
Local construction departments often include compliance guides — you can download the Philadelphia checklist here.
Equipped with thermal imaging tools, caulk, and spray foam, Local Energy Audits can find and fix leaks directly at your property./li>
Over 90% of the time, we complete testing with a passing score in two hours or less and handle all permit paperwork on-site.

Preparing for a Blower Door Test in King Of Prussia, PA

To properly prepare for blower door test in King Of Prussia, PA, the HVAC system and all bathroom and kitchen fans are turned off. We continue with a walkthrough inspection to confirm every exterior door and window is firmly closed — especially those to unconditioned spaces outside the thermal envelope. With the home properly sealed, we mount the blower door frame and fan in a central exterior door, using it to depressurize to 50 Pascals for exact airflow readings. Once the home is under depressurization, exterior air infiltrates faster through cracks, helping pinpoint leaks. A thermal imager helps highlight problem zones by detecting temperature variations in walls, ceilings, and areas connected to unconditioned spaces. We bring the tools and materials—chalk, spray foam, and weatherstripping—to work with homeowners or contractors in fixing visible air leakage issues immediately. After sealing, we can immediately retest to confirm whether the desired blower door score has been reached, ensuring your home complies with local energy efficiency standards in King Of Prussia, PA.

Blower Door Test for Contractors in King Of Prussia, PA

Most professionally insulated homes undergoing blower door test in King Of Prussia, PA can resolve small issues on-site during the contractor’s visit. By applying materials such as chalk and spray foam, small leaks or gaps are often sealed on the spot. In over 90% of cases, we manage to secure a passing blower door test score within just two hours and immediately provide all necessary paperwork to close out the permit process.

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Schedule Your blower door test in King Of Prussia, PA

Get professional-grade, efficient, and certified blower door test in King Of Prussia, PA handled by our experienced staff. Whether you’re improving a home’s efficiency or ensuring code compliance for a project, we perform every test with professionalism and attention to detail.

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