Blower Door Test Cost in Massachusetts
If you’re building new construction in Massachusetts, a blower door test is required by the Stretch Energy Code. Understanding what it costs — and what’s included — helps you budget your project accurately and avoid surprises.
How Much Does a Blower Door Test Cost in Massachusetts?
A standalone blower door test in Massachusetts typically costs between $300 and $600. However, most builders bundle the blower door test with a full HERS rating package, which typically ranges from $600 to $2,500 total depending on project size and complexity.
Bundling is almost always more cost-effective. The HERS rater needs to be on site for the final HERS inspection anyway, so combining the blower door test and duct leakage test in the same visit saves time and money for everyone.
What’s Included in a Blower Door Test?
A certified blower door test includes:
- Equipment setup — mounting the blower door fan in an exterior door and sealing all intentional openings (fireplace dampers, ventilation exhausts, etc.)
- Pressurization and depressurization testing — typically conducted at 50 Pascals in both directions
- ACH50 calculation — dividing measured airflow by building volume
- Written test report — documenting the results for your building department
- Certificate — required for Stretch Code compliance documentation
What Is the Required Blower Door Test Result in Massachusetts?
The Massachusetts Stretch Energy Code requires new residential construction to achieve 3.0 ACH50 or better. Towns on the standard Massachusetts Building Code require 5.0 ACH50.
What If You Fail the Blower Door Test?
If your initial test comes in above 3.0 ACH50, you’ll need to locate and seal additional air leaks before retesting. Common fixes include:
- Spray foam at all penetrations through the building envelope
- Weatherstripping and insulation at the attic hatch
- Caulk at top plates and band/rim joists
- Airtight covers on recessed lights in insulated ceilings
A retest is an additional charge. Working with an experienced rater who understands Massachusetts construction helps minimize the risk of failure.
Can You Do a Blower Door Test Without a HERS Rating?
Yes — some projects only need a blower door test for building department purposes without a full HERS rating. However, if your town has adopted the Massachusetts Stretch Energy Code, you’ll typically need both.
Schedule a Blower Door Test Today
Home Energy Efficiency Consultants offers fast, certified blower door testing across all of Massachusetts. We offer same-day scheduling, 24/7 support, and work around your construction timeline.
Call (617) 501-6788 or contact us online for a free quote. We’ve completed thousands of blower door tests on Massachusetts new construction projects — from single-family homes to large multi-family developments.
