Bathroom Venting In Attic

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.

Bathroom venting in attic.

Through the roof or an exterior gable wall. Exhaust air from toilet rooms and bathrooms shall not discharge into attic crawl space or other areas inside building. Each bathroom has its own exhaust fan. Each fan vents separately out the roof.

There are several other factors to consider for proper ventilation such as. Building code is a model code that each community can adopt and adapt according to its own needs. Duct already wrapped in insulation at home centers. Example model ventilation codes.

Exhausting of the bath vent fan must indeed be to the building exterior. Bathroom ventilation codes require a bathroom exhaust fan to vent to the exterior not the attic for health and structural reasons. So you will need to check with your city or county planning and permitting department to find out code requirements regarding bathroom fans. Either way the vent will have to go directly to the outside and installed with a vent hood cover.

Although this isn t always possible in attic crawl spaces you should always insulate the duct to prevent condensation problems. You can find 4 in. One in line centrifugal fan can be mounted in the attic to exhaust the moisture from two bathrooms. An enclosed toilet would require its own exhaust fan exhaust fans approved for installation in wet areas would need to be located over or near the shower or tub bathroom doors should have at clearance to the floor.

The best exhaust fan venting is through smooth rigid ducts with taped joints and screwed to a special vent hood. Bathroom fan vent code requirements include no venting to attic areas to help reduce mold or structural problems. 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. What is the bathroom exhaust fan venting code.

This can also cause mold to form on wood or insulation in an attic space above a bathroom. See bathroom vent duct termination for details about how to terminate the bath exhaust vent duct. Options for venting a bathroom exhaust fan include best to worst. Mold in a bathroom can be caused by a plumbing leak but splotchy stains on wall or ceiling surfaces usually indicate inadequate ventilation too much moisture in bathroom air.