How To Vent A Bathroom Fan In The Attic

Vent your bath and kitchen exhaust fans through the roof through a special roof hood.

How to vent a bathroom fan in the attic.

The truth about attic bathroom venting. Bathroom exhaust fans perform an important function by removing excess moisture from your home. This involves running ductwork from the fan usually though an attic and out through the roof. The best exhaust fan venting is through smooth rigid ducts with taped joints and screwed to a special vent hood.

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. Depending on the location of the bathroom it may be easy to vent the exhaust fan through the roof. The bathroom here is below an accessible attic so tom ran the exhaust duct across the attic and out a gable end. No you cannot vent the bathroom exhaust fan into the soffit vents.

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. But while you can t have two fans with one vent you can make one fan and one vent serve two bathrooms. A grille in each bathroom attaches to ducts which then fasten to a y connector at the fan. If you vent through the roof condensation will drip back into the interior.

The lowdown on venting your bath fan into an attic is that it can be done but it should terminate on the outside. Options for venting a bathroom exhaust fan include best to worst. To determine which size fan to buy for your bath multiply the room s square footage by 1 1. Venting through a roof vent or exhausting them in the attic could cause moisture problems and rot.

This setup requires an in line centrifugal fan mounted in the attic drawing air simultaneously from both bathrooms see photo. I would by lying if i told you that it will cause problems it may be totally fine. It eliminates the need for routing ductwork through the house and these fans usually dry the bathroom more quickly. 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.

Bathroom vent fans are rated by how many cubic feet of air they can move in one minute known as the cfm rating. If you vent through a soffit where attic vents are often located the moisture will get sucked back up into the attic or roof venting. Can you vent a bathroom exhaust fan into the soffit vents.