Bathroom Exhaust Duct In Attic

To determine which size fan to buy for your bath multiply the room s square footage by 1 1.

Bathroom exhaust duct in attic.

Dumping bathroom exhaust into an attic or under roof space invites costly mold contamination frost under the roof in freezing climates moisture damage to roof sheathing possibly even plywood delamination or rot roof failures and shorter roof shingle life. To avoid unnecessary reductions in air movement through the bath vent exhaust system avoid elbows and bends as much as possible. In order to accomplish this the roof has to have a hole cut in it. There are wall mount exhaust fans as well as ceiling exhaust fans.

When venting a bathroom exhaust fan make sure to vent the air to the outside rather than into your attic where it can cause mold and mildew to form. It is because of this that many builders tend to advise against this method. Bathroom vent fans are rated by how many cubic feet of air they can move in one minute known as the cfm rating. Ceiling fans vent either into the attic or outside through the roof.

The bathroom here is below an accessible attic so tom ran the exhaust duct across the attic and out a gable end. This involves running ductwork from the fan usually though an attic and out through the roof. The building code requires a bathroom exhaust fan to vent outside the building so installation of a new bathroom fan necessarily involves installation of ductwork. Bathroom exhaust fans perform an important function by removing excess moisture from your home.

Bathroom fan sound levels. There we also note. Depending on the location of the bathroom it may be easy to vent the exhaust fan through the roof. It may also violate a shingle warranty.