Bathroom Exhaust Duct In Attic

Bathroom fan sound levels.

Bathroom exhaust duct in attic.

To avoid unnecessary reductions in air movement through the bath vent exhaust system avoid elbows and bends as much as possible. It is because of this that many builders tend to advise against this method. Bathroom exhaust fans perform an important function by removing excess moisture from your home. Bathroom vent fans are rated by how many cubic feet of air they can move in one minute known as the cfm rating.

The bathroom here is below an accessible attic so tom ran the exhaust duct across the attic and out a gable end. This is much easier to do if you have attic access because if you don t you usually have to remove some ceiling drywall and run the ducts along a joist. We explain at bathroom ventilation codes specs installers should make the bath vent fan duct run through the attic or any other space as short as possible. 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. In order to accomplish this the roof has to have a hole cut in it. Wall mount fans are mounted on an external wall of a home and are used if there isn t a way to vent through the roof as in the case of a bathroom on the first floor of a home.

There are wall mount exhaust fans as well as ceiling exhaust fans. 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. 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. This involves running ductwork from the fan usually though an attic and out through the roof.