Venting Attic Bathroom Fan

This setup requires an in line centrifugal fan mounted in the attic drawing air simultaneously from both bathrooms see photo.

Venting attic bathroom fan.

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. The truth about attic bathroom venting. 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. I would by lying if i told you that it will cause problems it may be totally fine.

Can you vent a bathroom exhaust fan into the soffit vents. The best exhaust fan venting is through smooth rigid ducts with taped joints and screwed to a special vent hood. The lowdown on venting your bath fan into an attic is that it can be done but it should terminate on the outside. Vent your bath and kitchen exhaust fans through the roof through a special roof hood.

A grille in each bathroom attaches to ducts which then fasten to a y connector at the fan. In fact i have seen numerous houses that haven t yet had signs of mold with the bath fan venting incorrectly. Bathroom exhaust fan venting code summary section r303 3. Bathroom exhaust fans perform an important function by removing excess moisture from your home.

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.