Blower Door Testing in York County, Maine

What a Blower Door Test Tells You

A blower door test measures how airtight a house is. We mount a calibrated fan in an exterior doorway and change the pressure inside the house, then measure how much air leaks through the building envelope. While the house is under pressure we can track down the leaks themselves, often with an infrared camera, so you know exactly where air sealing will help.

For York County Homeowners

York County has a little of everything: eighteenth and nineteenth century farmhouses and capes in Berwick, South Berwick, Eliot and Lebanon, mill-era homes in Sanford, Springvale and Biddeford, and coastal cottages and summer homes in York, Ogunquit, Wells and Kennebunk that have been converted for year-round living. Many were never designed to be airtight or well insulated, and winter wind off the coast finds every gap. A blower door test is the first step in every one of our home energy audits, and it's the best way to see whether insulation and air sealing work really made the house tighter.

For Builders: Energy Code Air Leakage Testing

Most new homes and many additions in Maine need to pass an air leakage test under the energy code. We can test your project, explain the results and help you plan ahead to pass. Pair it with duct leakage testing when ductwork is involved. See services for contractors.

Efficiency Maine Rebates

Air sealing and insulation work identified by testing may qualify for Efficiency Maine incentives. Programs change, so call or email us for help and see our Maine rebates page.

Towns We Serve

Berwick, North Berwick, South Berwick, Eliot, Kittery and York, Ogunquit, Wells, Kennebunk, Sanford and Lebanon, along with the New Hampshire Seacoast including Portsmouth.

Common Questions

How long does a blower door test take?

For a typical house, a blower door test usually takes about an hour on site, including setup.

Do you test new construction for energy code?

Yes. We test new homes and additions for energy code air leakage requirements and can help builders plan to pass.

Which York County towns do you cover?

We're based in Berwick and serve York County towns including South Berwick, Eliot, Kittery, York, Wells, Ogunquit, Kennebunk and Sanford. Call if you're not sure.