Bathroom Exhaust Duct In Attic

One attic mounted fan for two bathrooms one in line centrifugal fan can be mounted in the attic to exhaust the moisture from two bathrooms.

Bathroom exhaust duct in attic.

Your attic is not a temperature controlled environment is never the same temperature as your living space and generally closer to the temperature outside. Ceiling fans vent either into the attic or outside through the roof. In order to accomplish this the roof has to have a hole cut in it. It is because of this that many builders tend to advise against this method.

See bathroom vent duct termination for details about how to terminate the bath exhaust vent duct. Example model ventilation codes. If you have a bathroom with a separate enclosed toilet you ll also need an additional fan for that space. If you have two bathrooms that are close together and one has an exhaust fan and the other doesn t you might be wondering if you can tie a new exhaust duct into the existing one.

It may also violate a shingle warranty. 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. This section notes that air exhausted from the bathroom must be sent outdoors not indoors to the same residence or indoors to any other dwelling unit. There are wall mount exhaust fans as well as ceiling exhaust fans.

You should never exhaust the bathroom fan directly into the attic. Bathroom exhaust fans perform an important function by removing excess moisture from your home. Depending on the location of the bathroom it may be easy to vent the exhaust fan through the roof. T he result of the insulation problem around a bathroom exhaust fan is either water stains or mold near the vent of your bathroom.

Another consideration to think about is the placement of your fan. Exhaust air from toilet rooms and bathrooms shall not discharge into attic crawl space or other areas inside building. Keep calm if that happens to you. While this may seem obvious homeowners may out of convenience direct the vent into either of these locations.

This involves running ductwork from the fan usually though an attic and out through the roof. Insulation problems will lead to other problems like the fan not being able to extract any humidity from the bathroom at all.