Exhaust Fan Into Roof

Through the roof or an exterior gable wall.

Exhaust fan into roof.

The best exhaust fan venting is through smooth rigid ducts with taped joints and screwed to a. Both bathrooms are vented by a single in line fan that has one exhaust vent running through the roof. It seems like such an easy solution just leave a bathroom vent hose in an attic. As the air leaves it creates negative pressure behind it sucking in cool air from below into the soffits and creating a self repeating ventilation process.

Florida home 30 years. Installing a vent hood on the roof. Intake vents located at the lowest part of the roof under the eaves allow cool air to enter the attic. It may also violate a shingle warranty.

Use stiff or flex ducting depending on your needs. Options for venting a bathroom exhaust fan include best to worst. However you can vent a bathroom fan through an attic while it terminates on the roof or gable end. Apply asphalt roof.

For a ceiling exit mark where you are going to cut the second hole for exiting from the house. Hd and lowes sell soffit vents. Start in the attic and drill a hole through the roof in the desired vent location. Hot air exhaust vents located at the peak of the roof allow hot air to escape.

I did not want to punch a hole into the roof so i ran the exhaust over to the soffit and installed it there with a vent. It s all outdoor air anyways right. Make sure the duct protrudes a little out both the ceiling and the exit point. Each bathroom has its own exhaust fan.

Go into the attic if you chose a ceiling exit and run the duct from the hole to an external wall or your roof. 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. It was just venting into the attic. One in line centrifugal fan can be mounted in the attic to exhaust the moisture from two bathrooms.

Each fan vents separately out the roof. 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. Once inside the air heats up and rises higher ultimately exiting through venting at the roof s gables through ridge vents cut into the roof s apex or other vent holes in the roof. Dumping bathroom exhaust into an attic or under roof space invites costly mold contamination frost under the roof in freezing climates moisture damage to roof sheathing possibly even plywood delamination or rot roof failures and shorter roof shingle life.

Vent exhaust fans through a roof hood roof vent hood details.