Venting Bathroom Exhaust Fan Through Wall

If your exterior siding is vinyl or fiber cement you will have an easier time cutting the hole.

Venting bathroom exhaust fan through wall.

No matter the location of the bathroom you can vent the exhaust fan through the wall. 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. Ductwork is what will connect the fan to the outside. If you vent through the roof condensation will drip back into the interior.

There aren t many options for routing an exhaust fan to the outside of the house. 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. Wiring for the exhaust vent fan light is routed to wall switches that in this case will turn on the fan if the light over the shower is also switched on. There are really only three venting options.

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. Wall mounted vent fans are available though they re not as common as ceiling mounted models and may be more difficult to install especially if you have a brick veneer house.