DIY Tracer Gas Testing?
I’ve begun air sealing my house (mainly the rim joist area, attic, and some windows and outlets), and I’ve opted to not have any blower door tests done, at least until I’m to the point where I have plugged the obvious leaks (and need to find the leaks I missed or didn’t think about), because the cost of these tests are not trivial.
But Allison Bailes’ interview of Joseph Lstiburek from the other day turned me on to tracer gas testing, and I’m wondering if this might be a cheaper option that I could do myself. From what I’ve found, the decay method seems very simple: Release CO2 into the home and distribute it with a powerful fan, until the concentration hits 5000ppm (still considered safe but can induce drowsiness/nausea). Then measure the concentration every few minutes for an hour or so. I can do all that. The missing link is the math used to turn this time series data into an ACH figure. How do I do that?
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