That is a direct quote from Jim Creech, a building science professional at RHA who did the blower door* test-out on the GIH for the Energy Upgrade CA Program.
When we tested the building before we renovated we received a score of 1959 (higher is more leaky). Normal is about one cfm/sq foot, so the old 1329 sq. ft. building was very drafty in the winter. The GIH project has a total square footage of 2,100 and the test still came in at 376! Despite temperatures in the 40’s outside recently and the fact we don’t yet have a heating system; the building maintained a very constant temperature and is not drafty at all.
We thought the GIH was working; but it is nice to have the science to back it up.
*A blower door, like it sounds, is a device with a fan and a meter that fits into the front door opening and measures the difference in pressure from inside to outside in cubic feet per minute (CFM). The point is to measure how much air is leaking in or out of the building that could contribute to heat loss and the house feeling drafty.
Jim Creech and Mark Gillan from RHA displaying the blower door reading from the GIH.
Jim Creech and Mark Gillan from RHA displaying the blower door reading from the GIH.
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