How To Vent Bathroom Fan Through Wall

Another method a little bit better is if you have a gable style roof and a gable vent on one end of the house you can attach this to the back of a gable vent.

How to vent bathroom fan through wall. Drive nail through house wall from attic. One is to route it over to a soffit vent and attach it to the back of the soffit vent but this can work against your exhaust fan because that s actually an air intake so not as good as other methods. The location of the bathroom will determine how extensive the ductwork will be. The fan and light will be installed over a bathroom shower.

Ductwork is what will connect the fan to the outside. Of duct just inside the termination point which is where condensation is most likely to happen. Secure cap with stainless steel screws. Keep the vent low and run the insulation over the duct.

Through the wall no matter the location of the bathroom you can vent the exhaust fan through the wall. Slide wall cap and connector duct into hole. 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 saw drill bit. Apply caulk around the backside of the wall cap.

There are ductless vent fans that use a charcoal filter to remove odors but they do not remove excess moisture which is the main purpose of a bathroom vent fan. To remove excess moisture from your bathroom the fan needs to vent outside. Click to enlarge any image the exhaust duct using solid metal steel in this case is routed through the ceiling out over the wall top down through a soffit or roof eaves overhang and then enclosed against pest entry. 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.

Wipe away excess caulk. If your exterior siding is vinyl or fiber cement you will have an easier time cutting the hole. 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 exhaust to disperse outdoors. Best practice is to wrap the entire duct with r 3 to r 8 insulation but if nothing else you should at least wrap the 6 ft.

From outside use 4 inch hole saw to cut hole for wall cap. In this video this old house general contractor tom silva explains how to vent a bathroom fan.