Vent Bathroom Fan Out Roof

Depending on the location of the bathroom it may be easy to vent the exhaust fan through the roof.

Vent bathroom fan out roof.

I have gotten mixed opinions on whether to vent the new fan through the roof or through the soffit eave. Bathroom exhaust fans perform an important function by removing excess moisture from your home. Bathroom ventilation fan duct routing routing a bath vent duct down out or up through an attic or roof out. From the roof find the nail and use the utility knife to cut roof shingles from around the nail.

In all cases the ducting needs to conduct the exchaust to the building exterior and needs to terminate in an animal proof vent cover. How to repair a bathroom fan. As a rule of thumb most bathroom air movement capacity rates will work out to be one cfm per square foot of bathroom area. Special bathroom fan roof vents with an internal damper that opens only when the fan is blowing will send moist air outdoors and keep cold air out of the house.

The roof contractor recommends the soffit to minimize protrusio. One in line centrifugal fan can be mounted in the attic to exhaust the moisture from two bathrooms. Installing a vent hood on the roof. If you have two bathrooms that are close together and one has an exhaust fan and the other doesn t you might be.

For example an 8 x 5 bathroom would require a 40 cfm exhaust fan. Center the nail between two rafters. This article describes routing bath exhaust fan duct upwards through an attic or roof space or downwards through a floor or crawl space. No you cannot vent your bathroom exhaust fan into the 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. Slide a flat pry bar underneath the shingles around the nail to break the weather seal. This involves running ductwork from the fan usually though an attic and out through the roof. Each fan vents separately out the roof.

A down through soffit exhaust vent design by leaving warm air in the exhaust duct when the fan is off creates a heat trap that reduces heat loss out of the bathroom through the exhaust fan duct when the fan is off in comparison with up routed vents or even horizontal vents through a gable end wall. Each bathroom has its own exhaust fan.