Blower Door Results — room for improvement?
I had a blower door test performed as well as thermal imaging taken.
My home is 3300 sq ft of finished living space, 1600 sq ft of unconditioned basement and about 1200 sq feet of unconditioned attic (the remaining roof is cathedral ceiling).
My blower door test came back at 3050 cfm. The tech said that to get down to 2350 cfm would be “perfect” and that I was about 30% above optimal but that it, in his estimation, we were at the point of diminishing returns outside of caulking some areas we identified as leakage sites.
I read this article and want to confirm my math / understanding here is accurate:
Units — cfm 50 per 100 sq ft of building envelope / per square
Total building envelope — 6100 sg ft / 61 squares
3050 cfm 50 / 61 squares = 50 cfm 50 per 100 sq ft of building envelope
Am I tracking correctly? Thank you!
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