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Old 12-17-2008, 09:41 AM   #1
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Bathroom Fan Leak and Repair?


I have a bathroom ceiling vent fan that has a water leak ring around it in the ceiling. I have traced it in the attic and narrowed down the problem and it is drips of water that are forming in the tubing that is being vented into the attic. These bits of water are dripping down the tube to the hole around around the fan. The vent hose was not sealed completely to the vent fan connection, over time, thus the water is dripping out from around the hose end and pooling on the top of the sheetrock(what is the best way to connect this hose to the vent connection-is there some sort of hose connectior similar to a dryer hose connector?).

My question is, is the water that is forming inside the hose common in the winter time? I live in a cold climate thus the underside of the roof gets cold with frost forming on the underside and I guess that it melts a bit and drips down into the vent tube or just condensation in the attic. Is it good to install insulation on the underside of of the roof? Ideas?

Any help would be appreciated? Thanks!
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Old 12-17-2008, 10:30 AM   #2
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Bathroom Fan Leak and Repair?


Imagine a cold soda can on a warm humid day. Water condenses on the can. Your vent is the same thing...A warm humid air-filled tube in a cold attic. If it runs back toward the fan, it isn't uncommon for water to accumulate in or around the fan.

The best solution is to avoid long vertical runs of vent and run it horizontally to the outdoors (via the soffit) instead.

Another effective option is to insulate the vent with flexible tube-shaped duct. Simply pull the fan vent through it.
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