Bathroom Exhaust Fan Vented Into Attic

No you cannot vent the bathroom exhaust fan into the soffit vents.

Bathroom exhaust fan vented into attic.

The lowdown on venting your bath fan into an attic is that it can be done but it should terminate on the outside. I would by lying if i told you that it will cause problems it may be totally fine. Can you vent a bathroom exhaust fan into the soffit vents. Bathroom ventilation codes require a bathroom exhaust fan to vent to the exterior not the attic for health and structural reasons.

Bathroom ventilation fan duct routing routing a bath vent duct down out or up through an attic or roof out. In fact i have seen numerous houses that haven t yet had signs of mold with the bath fan venting incorrectly. Note that the bathroom vent fan must always exhaust to the outdoors. In all cases the ducting needs to conduct the exchaust to the building exterior and needs to terminate in an animal proof vent cover.

This article describes routing bath exhaust fan duct upwards through an attic or roof space or downwards through a floor or crawl space. 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 setup requires an in line centrifugal fan mounted in the attic drawing air simultaneously from both bathrooms see photo. Bathroom fan vent code requirements include no venting to attic areas to help reduce mold or structural problems.

The truth about attic bathroom venting. You d often blow air from one bathroom into the other and local building inspectors wouldn t approve it. Never allow the duct to simply blow into an attic crawlspace or other enclosed area. Bathroom exhaust fans perform an important function by removing excess moisture from your home.