Bathroom Fan Vent Exhausts Into Attic

Bathroom ventilation codes require a bathroom exhaust fan to vent to the exterior not the attic for health and structural reasons.

Bathroom fan vent exhausts into attic.

The truth about attic bathroom venting. It eliminates the need for routing ductwork through the house and these fans usually dry the bathroom more quickly. How to install a bathroom vent fan. This setup requires an in line centrifugal fan mounted in the attic drawing air simultaneously from both bathrooms see photo.

You should never exhaust the bathroom fan directly into the attic. We explain how to install bathroom exhaust fans or vents the vent ducting. Bathroom exhaust fans perform an important function by removing excess moisture from your home. I would by lying if i told you that it will cause problems it may be totally fine.

Depending on the location of the bathroom it may be easy to vent the exhaust fan through the roof. Bathroom code does address the issue of moving odor and moisture laden air from the bathroom to the outside. But while you can t have two fans with one vent you can make one fan and one vent serve two bathrooms. Your attic is not a temperature controlled environment is never the same temperature as your living space and generally closer to the temperature outside.

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 involves running ductwork from the fan usually though an attic and out through the roof. All municipalities have different requirements but some do not draw a hard line on requiring exhaust fans. Bathroom fan vent code requirements include no venting to attic areas to help reduce mold or structural problems.

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 article describes routing bath exhaust fan duct upwards through an attic or roof space or downwards through a floor or crawl space. Vent your bath and kitchen exhaust fans through the roof through a special roof hood. The best exhaust fan venting is through smooth rigid ducts with taped joints and screwed to a special vent hood.

In fact i have seen numerous houses that haven t yet had signs of mold with the bath fan venting incorrectly. Options for venting a bathroom exhaust fan include best to worst. Surprisingly bathroom fans are not required by some building codes. 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.

Bath vent fan installation building codes bath vent fan troubleshooting bath vent fan repair. The lowdown on venting your bath fan into an attic is that it can be done but it should terminate on the outside. Bathroom ventilation fan duct routing routing a bath vent duct down out or up through an attic or roof out.