Installing Bathroom Exhaust Fan Duct Through Roof

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.

Installing bathroom exhaust fan duct through roof. If you vent through the roof condensation will drip back into the interior. The best exhaust fan venting is through smooth rigid ducts with taped joints and screwed to a special vent hood. We explain how to install bathroom exhaust fans or vents the vent ducting the vent termination at the wall soffit or roof vent fan wiring bath vent duct insulation bath vent lengths clearances routing and we answer just about any other bathroom ventilation design or installation question you may have. Bathroom fan vent size pipe material exhaust bath fan through attic and roof install roof vent for bathroom fan if you cannot walk across the image of bathroom and closet 20000 reviews of the best bathroom and closet pictures.

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. 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. Venting through a roof vent or exhausting them in the attic could cause moisture problems and rot. Secure the fitting with foil duct tape.

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. Next use aviation snips to cut slits into the sheet metal sleeve. Pass the opposite end of the duct through the hole in roof. In all cases the ducting needs to conduct the exchaust 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. Use a nylon zip tie to securely hold the insulation to each end of the duct. Vent your bath and kitchen exhaust fans through the roof through a special roof hood. Take the end of the duct with the connector fitting and attach it to bath vent fan.