Install Bathroom Exhaust Fan Duct Through Roof

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.

Install bathroom exhaust fan duct through roof. The 2nd bathroom vent drips on the floor and is ruining the ceiling. Pass the opposite end of the duct through the hole in roof. I prefer to run my exhaust vents downward and out through the basement because there is no condensation inside the ducting but if you must go up. Venting two bathroom exhaust fans through one roof duct won t work sorry to say.

Take the end of the duct with the connector fitting and attach it to bath vent fan. 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. Next use aviation snips to cut slits into the sheet metal sleeve.

Typically an exhaust fan that is vented through the roof has a roof hood or roof cap which allows air to exhaust but provides protection from wind blown rain. By the diy experts of the family handyman magazine. If it is actually rain water coming in through the duct from the roof confirm that is there a cap on the duct if not install one. This is a roof top exhaust hood that totally prevents any moisture from the bathroom or the kitchen from causing rot problems in the attic.

The 2 pipes one a 4 master and the other a 3 2nd do not go through the ceiling but into a common box that goes through the roof. Venting through a roof vent or exhausting them in the attic could cause moisture problems and rot. The master bathroom and the 2nd bathroom vent through the roof and through the same opening. Bathroom ventilation fan duct routing routing a bath vent duct down out or up through an attic or roof out.

To vent a bath fan through the roof you must first prepare a ductwork connecting the roof top to the bathroom. Secure the fitting with foil duct tape. Then drill a hole on the roof top. The best exhaust fan venting is through smooth rigid ducts with taped joints and screwed to a special vent hood.

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. How to properly duct an exhaust fan through a roof. This article describes routing bath exhaust fan duct upwards through an attic or roof space or downwards through a floor or crawl space. 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.