Bath Fan Venting Into Attic

We explain how to install bathroom exhaust fans or vents the vent ducting.

Bath fan venting into attic.

This setup requires an in line centrifugal fan mounted in the attic drawing air simultaneously from both bathrooms see photo. The 8 best attic fans of 2020 8 ways to make a half bath shine. While this is not smart. Bathroom exhaust fans perform an important function by removing excess moisture from your home.

No you cannot vent your bathroom exhaust fan into the attic. This article describes routing bath exhaust fan duct upwards through an attic or roof space or downwards through a floor or crawl space. The best exhaust fan venting is through smooth rigid ducts with taped joints and screwed to a special vent hood. This article series explains why bathroom vent fans are needed and describes good bath vent fan choices necessary fan capacity and good bath vent fan and vent duct installation details.

Bathroom fan vent code requirements include no venting to attic areas to help reduce mold or structural problems. How to install a bathroom vent fan. The truth about attic bathroom venting. In all cases the ducting needs to conduct the exchaust to the building exterior and needs to terminate in an animal proof vent cover.

While this may seem obvious homeowners may out of convenience direct the vent into either of these locations. Bath vent fan installation building codes bath vent fan troubleshooting bath vent fan repair. In fact i have seen numerous houses that haven t yet had signs of mold with the bath fan venting incorrectly. But while you can t have two fans with one vent you can make one fan and one vent serve two bathrooms.

You d often blow air from one bathroom into the other and local building inspectors wouldn t approve it. Venting through a roof vent or exhausting them in the attic could cause moisture problems and rot. Your attic is not a temperature controlled environment is never the same temperature as your living space and generally closer to the temperature outside. Bathroom ventilation fan duct routing routing a bath vent duct down out or up through an attic or roof out.

Options for venting a bathroom exhaust fan include best to worst. It eliminates the need for routing ductwork through the house and these fans usually dry the bathroom more quickly. Bathroom ventilation codes require a bathroom exhaust fan to vent to the exterior not the attic for health and structural reasons. 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.

Vent your bath and kitchen exhaust fans through the roof through a special roof hood. Depending on the location of the bathroom it may be easy to vent the exhaust fan through the roof. This involves running ductwork from the fan usually though an attic and out through the roof. I would by lying if i told you that it will cause problems it may be totally fine.