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Thread: Exterior vent placement
02-23-2005, 10:17 PM #14
Just curious, but if it's a 90% furnace, with both exhaust and intake being pulled from outside. If the exhaust froze up, how would the pressure switch make and let the next step come on?
If it was a 80% or maybe (big maybe) a 90% pulling freshair from inside, I could see it happening... maybe.
Just wondering, not doubting you at all.