If you’re searching for blower door testing near me in the Tri-State area, Energy Services Group provides certified, code-compliant testing for homeowners and builders throughout Delaware, New Jersey, and Southeastern Pennsylvania.
As a DOE-certified verifier (Partner ID 2782/866), our testing meets federal energy program standards and local building code requirements. We deliver accurate results, clear documentation, and fast scheduling—so your project stays on track.
📞 Need testing for an upcoming inspection? Call (800) 908-7000 to check availability.
A blower door test measures how much air leaks through your home’s building envelope—the boundary between conditioned indoor space and the outdoors.
During testing, a calibrated fan is installed in an exterior doorway and depressurizes the home to 50 pascals (about the pressure of a 20-mph wind). Specialized instruments then measure how quickly outside air enters through gaps, cracks, and penetrations.
Results are reported as ACH50 (Air Changes per Hour at 50 Pascals). This number shows how many times the air inside your home is replaced under test conditions. Lower numbers indicate better air sealing and energy performance.
We stay current on Mid-Atlantic energy codes to ensure your project passes inspection:
Our testing documents your results and verifies compliance with local thresholds.
If your home has drafts, uneven temperatures, or high energy bills, a blower door test identifies where air leakage is occurring—such as attic penetrations, rim joists, window assemblies, and electrical outlets.
Instead of guessing, you receive measured data that supports targeted air sealing and insulation improvements.
Blower door testing is required for most new homes and qualifying additions before final inspection in Delaware, New Jersey, and Pennsylvania.
We work with builders throughout the permitting process and provide compliant documentation for inspectors. If a home tests above allowable limits, we pinpoint leakage areas so corrections can be made quickly and retested without delays.
Based in New Castle, Delaware, we serve homeowners and builders throughout:
Including Wilmington, Newark, Dover, West Chester, Media, and Cherry Hill.
Most projects can be scheduled within one to two weeks, depending on location and scope.
How much does a blower door test cost?
Pricing depends on home size and project type. Most residential tests fall within a standard range. Contact us for an exact quote.
How long are results valid for permits?
Most jurisdictions accept blower door results for several months, provided no major structural changes occur.
Do I need to prepare my home?
We provide simple pre-test instructions, including securing pets and closing windows and exterior doors.
Can you retest if my home fails?
Yes. We offer retesting after air sealing improvements are completed.