Bathroom Ventilation Through Attic Vent

Draw a mark on the bathroom ceiling where you d like to install the vent fan.

Bathroom ventilation through attic vent.

The model ventilation codes building codes mechanical codes plumbing codes do not generally discuss exhaust vent duct direction and routing such as up or down through attics or crawl areas but all of the model codes require that the vent fan must exhaust to the building exterior. Enter your options and zip code above then select update. Use an extra long 3 8 inch diameter spade bit to bore a reference hole through the ceiling and into the attic. Climb into the attic and clear away any insulation from around the hole.

Through the roof or an exterior gable wall. Get an instant vendor neutral estimate of bathroom ventilation options and costs in your zip code our cost guide has been updated for 2020 to reflect current fair wages and material option costs for bathroom vent. 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. Each bathroom has its own exhaust fan.

At bathroom ventilation codes specs home. It cannot move air to a crawlspace or 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. Leave the drill bit sticking through the roof so you can find the hole.

Bath vent fan duct routing. This section notes that air exhausted from the bathroom must be sent outdoors not indoors to the same residence or indoors to any other dwelling unit. There are several other factors to consider for proper ventilation such as. Both bathrooms are vented by a single in line fan that has one exhaust vent running through the roof.

Up through roof down through floor or crawl area. In all cases the ducting needs to conduct the exhaust to the building exterior and needs to terminate in an animal proof vent cover. This article describes routing bath exhaust fan duct upwards through an attic or roof space or downwards through a floor or crawl space. Each fan vents separately out the roof.

One in line centrifugal fan can be mounted in the attic to exhaust the moisture from two bathrooms. From up on the roof use a jigsaw or reciprocating saw to cut a 4 in. Options for venting a bathroom exhaust fan include best to worst. Start in the attic and drill a hole through the roof in the desired vent location.