Neutral pressure plane?
Background, my house has about 15ACH50, much of it coming from a very shallow crawlspace i cannot access (never mind fix, i hope to dig it out enough to access the entire perimeter of the house and encapsulate it someday)
My hallway storm door gets covered with humidity very quickly (less then 30 seconds) when i open the foam core door, and this is rather unique to this house, i could never explain why but this doesn’t happen in about a dozen other places i have lived in the area. When i found out about the massive air leakage last year i assumed that even though the storm door is rather airtight (during the blower door test) perhaps its a kind of stack effect going on.
Another door at the same level has a bad wood frame, i’ve had to tear out parts of it and am working on repairing it (its a crummy old wood door i would like to replace someday. With parts of the trim off its storm door is dripping water. From opening windows at this level i assumed the lack of airflow except during wind is because of the neutral pressure plane that has been mentioned, but could it instead be caused by exfiltration?
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