How To Vent A Bathroom Fan Through The Wall

This will serve as a reference point for positioning the wall cap.

How to vent a bathroom fan through the wall.

In addition to low profile bathroom exhaust fans there are also through the wall ventilation fans which you can install in your bathroom. Options for venting a bathroom exhaust fan include best to worst. It eliminates the need for routing ductwork through the house and these fans usually dry the bathroom more quickly. Never allow the duct to simply blow into an attic crawlspace or other enclosed area.

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. Almost all fans are square or rectangular in size. Keep the run of vent pipe as short and straight as possible. Depending on the location of the bathroom it may be easy to vent the exhaust fan through the roof.

I recommend that my clients vent their bath fans out a gable wall if at all possible when not using an hrv or erv that is. Drive nail through house wall from attic. 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. Then write these measurements on a paper.

Now take the maker and scale to draw the exact size on the wall. 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. In this video this old house general contractor tom silva explains how to vent a bathroom fan. To improve venting and reduce air resistance in the vent pipe.

Note that the bathroom vent fan must always exhaust to the outdoors. Behind a soffit vent. Other venting options includes running the duct up through the roof or down through the soffit. Behind a gable vent.

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. If you vent through the roof condensation will drip back into the interior. From outside use 4 inch hole saw to cut hole for wall cap. Through the roof or an exterior gable wall.

These aren t specifically made for bathroom fans because some people install them in kitchens garages mudrooms and other locations.