Bathroom Exhaust Fan Into Roof

This article describes routing bath exhaust fan duct upwards through an attic or roof space or downwards through a floor or crawl space.

Bathroom exhaust fan into roof.

If you re tempted to vent your exhaust fan through an existing roof vent or even vent it into the attic don t do it. In all cases the ducting needs to conduct the exchaust to the building exterior and needs to terminate in an animal proof vent cover. 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. Surprisingly bathroom fans are not required by some building codes.

All municipalities have different requirements but some do not draw a hard line on requiring exhaust fans. Wall mount fans are mounted on an external wall of a home and are used if there isn t a way to vent through the roof as in the case of a bathroom on the first floor of a home. Options for venting a bathroom exhaust fan include best to worst. Each fan vents separately out the roof.

It needs to exhaust to the exterior. Depending on the location of the bathroom it may be easy to vent the exhaust fan through the roof. Bathroom exhaust fans perform an important function by removing excess moisture from your home. Can you vent a bathroom exhaust fan into the soffit vents.

It eliminates the need for routing ductwork through the house and these fans usually dry the bathroom more quickly. How do i properly vent a bathroom fan into an attic. 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. The correct way to vent a bathroom fan through an attic is to terminate the vent either to the roof or to the gable wall.

This involves running ductwork from the fan usually though an attic and out through the roof. Ceiling fans vent either into the attic or outside through the roof. Second during cold winters you ll be blowing warm moist air onto a cold surface the roof vent and roof plywood. First you ll partially block your roof vent with the piping reducing the flow of cooling air through your attic.

Anon if i understand your original question you have a bath exhaust that is discharging into a roof cavity or space not to outside. Each bathroom has its own exhaust fan. In no case is it acceptable to just dump any exhaust fan directly into an attic. Bathroom code does address the issue of moving odor and moisture laden air from the bathroom to the outside.

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. On 2020 02 26 by anonymous. There are wall mount exhaust fans as well as ceiling exhaust fans.