Bathroom Exhaust Fan In Attic

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 in attic.

Both bathrooms are vented by a single in line fan that has one exhaust vent running through the roof. Iliving 16 wall mounted exhaust fan automatic shutter variable speed vent fan for home attic shed or garage ventilation 1200 cfm 1800 sqf coverage area 4 6 out of 5 stars 474 109 77 109. Depending on the location of the bathroom it may be easy to vent the exhaust fan through the roof. The warm air will exhaust out the duct and enter back into the attic through the soffit vent or ridge vent.

Another consideration to think about is the placement of your fan. The bathroom exhaust ventilation fan disperses air through an opening in the fan housing which is usually 3 inches in diameter and ideally faces in the direction of the ventilation system outlet. 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.

In order to accomplish this the roof has to have a hole cut in it. Each bathroom has its own exhaust fan. Each fan vents separately out the roof. It is because of this that many builders tend to advise against this method.

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. Avoid venting through a soffit vent or ridge vent. Ceiling fans vent either into the attic or outside through the roof. All municipalities have different requirements but some do not draw a hard line on requiring exhaust fans.

If you have access to the attic the fan can vent either through a gable wall or roof. Surprisingly bathroom fans are not required by some building codes. There are wall mount exhaust fans as well as ceiling exhaust fans. One in line centrifugal fan can be mounted in the attic to exhaust the moisture from two bathrooms.

You should never exhaust the bathroom fan directly into the attic. Letting the fan exhaust into an open attic will cause moisture buildup on the underside of the roof. If you have a bathroom with a separate enclosed toilet you ll also need an additional fan for that space. No you cannot vent your bathroom exhaust fan into the attic.

In all cases the ducting needs to conduct the exchaust to the building exterior and needs to terminate in an animal proof vent cover. Your attic is not a temperature controlled environment is never the same temperature as your living space and generally closer to the temperature outside. A 3 or 4 inch duct connects to the outlet on the fan housing and runs to a side wall or to the roof and connects to a vent cap that allows the.