Venting Attic Bathroom Fan

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

Venting attic bathroom fan.

But while you can t have two fans with one vent you can make one fan and one vent serve two bathrooms. 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. Venting through a roof vent or exhausting them in the attic could cause moisture problems and rot. Bathrooms must have windows when this section is adopted by a community it essentially says that for venting purposes bathrooms must have windows that open.

The lowdown on venting your bath fan into an attic is that it can be done but it should terminate on the outside. The best exhaust fan venting is through smooth rigid ducts with taped joints and screwed to a special vent hood. I would by lying if i told you that it will cause problems it may be totally fine. In fact i have seen numerous houses that haven t yet had signs of mold with the bath fan venting incorrectly.

A grille in each bathroom attaches to ducts which then fasten to a y connector at the fan. Bathroom exhaust fan venting code summary section r303 3. The truth about attic bathroom venting. This setup requires an in line centrifugal fan mounted in the attic drawing air simultaneously from both bathrooms see photo.

Can you vent a bathroom exhaust fan into the soffit vents.