Uniting with the World to Halt Global Warming



Revelations of a Home Blower Door Test

If you want to get serious about reducing your heating bills and helping the environment, have an energy audit of your home that includes a blower door test.


Fact: A blower door test conducted by a professional energy auditor is a reliable and useful diagnostic tool that is used to help determine how airtight a building is.


How It Works: The blower is a powerful calibrated fan that is temporarily mounted and sealed into the frame of an exterior door. The fan pulls air out of the house, lowering the air pressure inside. The higher outside air pressure then flows in through all unsealed cracks and openings. This test determines the air infiltration rate of a building.

What the Test Tells You About Your Home: The blower door test combined with an infrared scan, which locates sources of air leakage, allows the energy auditor to assess air infiltration as well as pinpoint areas of your home that should be insulated and sealed in order to reduce heat loss and improve the energy efficiency of your home. (Sealing leaks is often the more important step to take before investing in more insulation.) A blower door test provides immediate feedback when conducted before and after even small steps have been implemented to reduce air infiltration. Tests cost in the vicinity of $500, depending on work performed by the auditor, and have proven their worth as practical, cost-effective assessment tools. GWAC members have used Next Step Living (www.nextsteplivinginc.com) and Byggmeister (www.byggmeister.com).

See the January 12, 2009, issue of Time magazine to learn how important energy efficiency is in the fight against global warming.

The most recent science tells us that unless we can reduce the amount of carbon dioxide (CO2) in the atmosphere to 350 parts per million (ppm), we will cause huge and irreversible damage to the earth.” (CO2 levels in the atmosphere are now at about 387 ppm, up almost 40% since the industrial revolution and the highest for at least the last 650,000 years.) Brought to you by the Lexington Global Warming Action Coalition (www.lexgwac.org).