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Exhaust frozen


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I'd also check to make sure that there is sufficient slope to the exhaust flue (pipe) so that the condensate flows back toward the furnace. At the furnace there should me a means to get rid of all the condensate.

However, if the furnace flue runs a very short distance to the exterior, the flue gasses may not have time to fully condense in the flue. In that case, they would condense outside.

Judging by the location of the flue, I'm guessing that the furnace is in the basement. So the condensdate should go to a pump, sink, or floor drain.

I just had a new Condensing Furnace (AKA High Efficiency, 90+ )installed, I'll have to say ,I'm amazed by the amount of condensate it produces.

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