How To Vent An Exhaust Fan Through Existing Attic Vent

Hot air exhaust vents located at the peak of the roof allow hot air to escape.

How to vent an exhaust fan through existing attic vent.

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 attic. When i went to replace it i noticed that it wasn t being exhausted from the attic.

No you cannot vent the bathroom exhaust fan into the soffit vents. The keys to proper bathroom exhaust pacific west roofing. First you ll partially block your roof vent with the piping reducing the flow of cooling air through your attic. Second during cold winters you ll be blowing warm moist air onto a cold surface the roof vent and roof plywood.

Venting two bathroom exhaust fans through one roof duct won t work sorry to say. See below for a shopping list and tools subscribe. My bathroom exhaust fan recently broke. 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.

If you vent the bathroom exhaust fan to close to the soffit vents which are vented plates under your homes outer edge and roof your home the air can be sucked right back into the attic from the soffit. As a slant back vent the original photo shows it installed backwards. Warm moist bathroom air will condensate on its underside and can cause moisture damage mold on the roof sheathing. It should not be used for double duty for a bath fan exhaust.

By the diy experts of the family handyman magazine. I was about to make a separate hole in the nearest gable to exhaust the fan but my wife asked if i could butt the exhaust pipe up to the existing gable vent in order to avoid making another hole. But you can install one fan in your attic for both bathrooms and make your bathroom quieter too. This article describes routing bath exhaust fan duct upwards through an attic or roof space or downwards through a floor or crawl space.

Bathroom exhaust fans perform an important function by removing excess moisture from your home. Venting a bathroom fan into an attic my detailed home inspector secrets. If you re tempted to vent your exhaust fan through an existing roof vent or even vent it into the attic don t do it. This old house general contractor tom silva shows how to properly install a roof mounted bath fan vent.