New Construction Blower Door Testing

What Is It?

A Blower Door Test is a diagnostic tool used to measure the airtightness of a building. In new construction, this test is often required to verify that a home or building meets state energy code standards. By depressurizing the home with a powerful calibrated fan, the test measures how much air leaks through cracks, gaps, and penetrations in the building envelope.

For new construction projects, blower door testing ensures that the home has been properly sealed, is energy-efficient, and is ready to pass inspection.

Why It Matters for New Construction

  • Code Compliance: New York State building codes require blower door testing for new residential construction to ensure efficiency standards are met.

  • Energy Efficiency: Identifies and quantifies air leakage so builders can fix issues before project completion.

  • Comfort & Quality Assurance: Helps eliminate drafts, hot/cold spots, and future homeowner complaints.

  • Lower Operating Costs: A tighter building envelope reduces energy waste, leading to lower heating and cooling bills.

  • Improved Durability: Reducing uncontrolled air leakage protects the building from moisture damage, mold growth, and structural problems over time.

How It Works

  1. Setup
    A temporary frame and blower door fan are installed in an exterior doorway. All windows and doors are closed, and interior doors are opened to allow airflow throughout the home.

  2. Depressurization
    The fan pulls air out of the house, lowering inside pressure. As air tries to leak back in through cracks and gaps, specialized equipment measures the airflow required to maintain pressure.

  3. Leak Detection
    During the test, technicians may use smoke pencils, thermal cameras, or infrared tools to pinpoint the exact locations of leaks.

  4. Reporting & Guidance
    After testing, the results are provided with a measured Air Changes per Hour (ACH50) score. If the home fails to meet standards, builders receive guidance on sealing improvements to bring the home into compliance.

Benefits to Builders & Homeowners

  • Pass Inspections with Confidence: Ensures your new construction project meets state energy codes.

  • Avoid Costly Callbacks: Catch and fix air leaks before handing the home over to the buyer.

  • Reputation Boost: Demonstrates a commitment to building quality, energy-efficient homes.

  • Long-Term Savings: Homeowners enjoy lower energy bills, better comfort, and peace of mind.

  • Eligibility for Incentives: Homes that meet airtightness and efficiency standards may qualify for NYSERDA’s Comfort Home Program and other energy rebates.

Connection to NYSERDA & Comfort Home

  • NYSERDA requires blower door testing as part of its Residential Energy Audit and Home Performance programs.

  • The Comfort Home Program specifically encourages air sealing and insulation upgrades, which are directly tied to blower door testing results. (Comfort Home Program)

  • For builders and contractors, completing a blower door test ensures homes are aligned with Energy Star® and NYSERDA Home Performance standards.

What’s Next & How to Get Started

If you’re a builder, contractor, or homeowner working on a new construction project, we can provide certified blower door testing services that meet state and NYSERDA requirements.

  • Contact us early in your project timeline to schedule the test.

  • We’ll provide the testing, report, and any guidance for improvements if needed.

  • Once your home passes, you’ll have documentation for code compliance and energy program eligibility.

References & Helpful Links

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