Bathroom Exhaust Fan Attic Venting

Ceiling fans vent either into the attic or outside through the roof.

Bathroom exhaust fan attic venting. If you have a bathroom with a separate enclosed toilet you ll also need an additional fan for that space. Vent your bath and kitchen exhaust fans through the roof through a special roof hood. Each bathroom has its own exhaust fan. There are wall mount exhaust fans as well as ceiling exhaust fans.

Bathroom vent fans are rated by how many cubic feet of air they can move in one minute known as the cfm rating. Also the code numbering in your area may differ from those. In fact i have seen numerous houses that haven t yet had signs of mold with the bath fan venting incorrectly. If you have two bathrooms that are close together and one has an exhaust fan and the other doesn t you might be.

Depending on the location of the bathroom it may be easy to vent the exhaust fan through the roof. To determine which size fan to buy for your bath multiply the room s square footage by 1 1. Each fan vents separately out the roof. The best exhaust fan venting is through smooth rigid ducts with taped joints and screwed to a special vent hood.

The bathroom here is below an accessible attic so tom ran the exhaust duct across the attic and out a gable end. So you will need to check with your city or county planning and permitting department to find out code requirements regarding bathroom fans. No you cannot vent the bathroom exhaust fan into the soffit vents. This involves running ductwork from the fan usually though an attic and out through the roof.

The truth about attic bathroom venting. If you vent the bathroom exhaust fan to close to the soffit vents which are vented plates under your homes outer edge and roof your home the air can be sucked right back into the attic from the soffit. One in line centrifugal fan can be mounted in the attic to exhaust the moisture from two bathrooms. It eliminates the need for routing ductwork through the house and these fans usually dry the bathroom more quickly.

Venting through a roof vent or exhausting them in the attic could cause moisture problems and rot. Ventilation fans improve indoor air quality by venting moist air quickly outside which helps to control mold and mildew growth. Options for venting a bathroom exhaust fan include best to worst. Bathroom exhaust fans perform an important function by removing excess moisture from your home.

Building code is a model code that each community can adopt and adapt according to its own needs. 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. I would by lying if i told you that it will cause problems it may be totally fine. The lowdown on venting your bath fan into an attic is that it can be done but it should terminate on the outside.

Can you vent a bathroom exhaust fan into the soffit vents.