Energy Issues at Home - What a Blower Door Test Can Do for You

Here is some basic info on what is accomplished with a blower door test on your home:

• Measure the building envelope's air-tightness
• Insure your home is properly ventilated
• Find the air leaks and seal them
• in and around ducts and wiring
• around windows and doors
• around plumbing and piping
• rim joist and framing
• Compare pressure differential in different parts of the house
• garage and house
• attic and house
• crawl space and basement
• porch roof and house

I use this tool, among others in some of the work I now do as an energy efficiency programs manager. Using the hard evidence gained from these tests you can increase your comfort and lower your bills. But don't take my word for it. 

Check out these posts from the venerable GreenBuildingAdvisor.com:

Blower Door Basics

Blower Doors Are Essential