How To Vent Bathroom Fan Through Wall

From outside use 4 inch hole saw to cut hole for wall cap.

How to vent bathroom fan through wall.

Behind a gable vent. Options for venting a bathroom exhaust fan include best to worst. If you want to vent a bathroom fan through an exterior wall you will have to cut a 3 inch or 4 inch hole with a hole. Bathroom vent fans are rated by how many cubic feet of air they can move in one minute known as the cfm rating.

The fan can be vented either through the ceiling or wall. 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. Fans also have a sound rating measured in sones. Since a bathroom vent fan should run for 10 15 minutes after you finish your shower to remove all the moisture consider a fan that cuts on and off automatically using a moisture sensor or replace the wall switch with a timer.

1 climb into the attic and locate the bath fan. Installing a bath fan through a wall isn t that difficult of a job if you have the right tools. To improve venting and reduce air resistance in the vent pipe. It can probably be done in an afternoon if you are organized for the job but it may take a weekend if you aren t fully prepared.

To determine which size fan to buy for your bath multiply the room s square footage by 1 1. Keep the run of vent pipe as short and straight as possible. It eliminates the need for routing ductwork through the house and these fans usually dry the bathroom more quickly. This will serve as a reference point for positioning the wall cap.

Behind a soffit vent. Drive nail through house wall from attic. Depending on the location of the bathroom it may be easy to vent the exhaust fan through the roof. In this video this old house general contractor tom silva explains how to vent a bathroom fan.

Through the roof or an exterior gable wall. 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. However venting through the wall is considerably less risky. If you vent through a soffit where attic vents are often located the moisture will get sucked back up into the attic or roof venting.

If you vent through the roof condensation will drip back into the interior. This involves running ductwork from the fan usually though an attic and out through the roof.