New Blower Door
We recently purchased a Minneapolis blower door to use in energy audits. A blower door is used to test a home for air leakage. It is the only way to effectively find and fix air leakage in houses. We use the blower door, an Infrared camera, and smoke machines as our primary tools.
Now we have tools that measure air leakage, locate the source of the leakage and even visualy identify the leakage path. We can detirmine the overall amount of leakage, proportion the leakage between various zones in the house such as attic ceiling, walls, basements, garages. Once we have identified a problem area or leaky zone, then we use the IR camera to locate specific leaks.
Air leakage is often 25 to 35% of total heat loss in a building, but it can be very difficult to trace. Air is slippery and invisible. If you plug one leak, air will often find another route into your home. We often find air pathways between basements and attics.
Finding and sealing air leakage is usually the first step in making a home more comfortable. It is never possible to completely seal up an existing house, so we prioritize the big leaks. We use a variety of methods and materials to seal leaks, depending on their location and size. It is especially important that any leaks between the home and the attic be sealed before attic insulation is added.