Open door zonal pressure test. Should both readings be done at 50 Pa?
Testing attic with home at 50 Pa and attic reading 40 Pa. Open scuttle hole until attic reads 20 Pa to see what the orginial hole size was. Does the blower door speed saty the same or ramp back up to 50 Pa when scuttle is open?
Posted Jun 11, 2010 9:16 PM ET
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