How To Vent An Exhaust Fan Through Existing Attic Vent

By the diy experts of the family handyman magazine.

How to vent an exhaust fan through existing attic vent.

Options for venting a bathroom exhaust fan include best to worst. In order to accomplish this the roof has to have a hole cut in it. When venting a bathroom exhaust fan make sure to vent the air to the outside rather than into your attic where it can cause mold and mildew to form. The lower half of the flange sits on top of the shingles.

Venting two bathroom exhaust fans through one roof duct won t work sorry to say. This involves running ductwork from the fan usually though an attic and out through the roof. Unlike fabric duct tape it won t deteriorate over time. Remove the knockout hole on the side of the fan s housing and attach a cable connector.

In all cases the ducting needs to conduct the exchaust to the building exterior and needs to terminate in an animal proof vent cover. Bathroom ventilation fan duct routing routing a bath vent duct down out or up through an attic or roof out. Taking advantage of this natural process referred to as passive ventilation is the most common way to vent an. Choosing a whole house fan.

Depending on the location of the bathroom it may be easy to vent the exhaust fan through the roof. Through the roof or an exterior gable wall. Use foil duct tape. Set the vent fan down into place between the joists centered on the ceiling hole.

But you can install one fan in your attic for both bathrooms and make your bathroom quieter too. It is because of this that many builders tend to advise against this method. Hot air exhaust vents located at the peak of the roof allow hot air to escape. No you cannot vent your bathroom exhaust fan into the attic.

Your attic is not a temperature controlled environment is never the same temperature as your living space and generally closer to the temperature outside. Slide the vent under the shingles so they cover the top half of the vent flange. Slide the four metal brackets into the tabs protruding from the sides of the vent fan. You should never exhaust the bathroom fan directly into the attic.