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.

This is a ridge mounted slant back roof vent it s used to ventilate attic air to the outside. Taking advantage of this natural process referred to as passive ventilation is the most common way to vent an attic. My bathroom exhaust fan recently broke. But you can install one fan in your attic for both bathrooms and make your bathroom quieter too.

This old house general contractor tom silva shows how to properly install a roof mounted bath fan vent. 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. Can you vent a bathroom exhaust fan into the soffit vents. By the diy experts of the family handyman magazine.

No you cannot vent the bathroom exhaust fan into the soffit vents. First you ll partially block your roof vent with the piping reducing the flow of cooling air through your attic. See below for a shopping list and tools subscribe. In all cases the ducting needs to conduct the exchaust to the building exterior and needs to terminate in an animal proof vent cover.

Second during cold winters you ll be blowing warm moist air onto a cold surface the roof vent and roof plywood. The keys to proper bathroom exhaust pacific west roofing. 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. Venting a bathroom fan into an attic my detailed home inspector secrets.

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. 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. Venting two bathroom exhaust fans through one roof duct won t work sorry to say. Bathroom ventilation fan duct routing routing a bath vent duct down out or up through an attic or roof out.

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. Warm moist bathroom air will condensate on its underside and can cause moisture damage mold on the roof sheathing. As a slant back vent the original photo shows it installed backwards. When i went to replace it i noticed that it wasn t being exhausted from the attic.