Blower Door

Blower Door

The blower door is a powerful tool that measures the air leakage in your home. Experience has shown us that most homes are between 150-300% leakier than what is recommended for an energy efficient home. Older homes with no insulation can be up to 500% leakier. This translates into a lot of wasted energy, high utility bills, and areas of your home where the heat escapes and the cold air rushes in.

The blower door is a big fan that fits into the frame of the front door. It depressurizes your home and measures the air exchange per minute. While the blower door is operating, we can inspect your home and locate where the drafts are coming from. We will also scan your home at this time with the infrared thermal imaging camera to pinpoint any problem areas as well.

Before we perform any air sealing measures, we will calculate the Building Airflow Standard (BAS) which determines the proper amount of air exchange for your particular home. The BAS is calculated by taking into account your home’s volume, the number of stories you have, your geographic location, and how many people are occupying the home. Then we run the blower door to calculate the actual air exchange. We do this because if your home is already tight we do not want to make it too tight and cause any safety issues before performing the air sealing measures.

Even newer homes can benefit from a blower door test. Lumber today is not the same as it was 50+ years ago when it had time to cure and many homes were more solidly built. The lumber used today is not nearly as mature because the lumber yards are cranking it out at such large volumes it doesn’t have time to season. This requires the wood to acclimate to the new home environment; a process which can take as many as 8-10 months. The wood can shrink or expand depending on your location and the time of year. If it shrinks, it can leave small gaps throughout your attic plain causing air leakage and a high blower door number. Even new homes can benefit from air sealing and additional insulation above and beyond code, which is often outdated and not up to energy efficient standards.

Contact us to find out how we can make your home more comfortable!