How To Vent An Exhaust Fan Through Existing Attic Vent

Bathroom exhaust fans perform an important function by removing excess moisture from your home.

How to vent an exhaust fan through existing attic vent.

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. See below for a shopping list and tools subscribe. Taking advantage of this natural process referred to as passive ventilation is the most common way to vent an attic. 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.

When i went to replace it i noticed that it wasn t being exhausted from the attic. Warm moist bathroom air will condensate on its underside and can cause moisture damage mold on the roof sheathing. This old house general contractor tom silva shows how to properly install a roof mounted bath fan vent. The keys to proper bathroom exhaust pacific west roofing.

Hot air exhaust vents located at the peak of the roof allow hot air to escape. This is a ridge mounted slant back roof vent it s used to ventilate attic air to the outside. 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. But you can install one fan in your attic for both bathrooms and make your bathroom quieter too.

Can you vent a bathroom exhaust fan into the soffit vents. Venting a bathroom fan into an attic my detailed home inspector secrets. Second during cold winters you ll be blowing warm moist air onto a cold surface the roof vent and roof plywood. First you ll partially block your roof vent with the piping reducing the flow of cooling air through your attic.

It should not be used for double duty for a bath fan exhaust. As a slant back vent the original photo shows it installed backwards. 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. By the diy experts of the family handyman magazine.

No you cannot vent the bathroom exhaust fan into the soffit vents. Venting two bathroom exhaust fans through one roof duct won t work sorry to say. 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.