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.

Venting attic bathroom fan. 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. Venting through a roof vent or exhausting them in the attic could cause moisture problems and rot. A grille in each bathroom attaches to ducts which then fasten to a y connector at the fan. The truth about attic bathroom venting.

No you cannot vent the 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. Can you vent a bathroom exhaust fan into the soffit vents. This setup requires an in line centrifugal fan mounted in the attic drawing air simultaneously from both bathrooms see photo.

Vent your bath and kitchen exhaust fans through the roof through a special roof hood. 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. Bathroom exhaust fan venting code summary section r303 3. 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.

In fact i have seen numerous houses that haven t yet had signs of mold with the bath fan venting incorrectly.