Can You Exhaust Bath Fan Into Attic

Surprisingly bathroom fans are not required by some building codes.

Can you exhaust bath fan into attic.

In those areas ventilation in bathrooms is required but it can be from a window or fan your choice. You d often blow air from one bathroom into the other and local building inspectors wouldn t approve it. It seems like such an easy solution just leave a bathroom vent hose in an attic. This setup requires an in line centrifugal fan mounted in the attic drawing air simultaneously from both.

It needs to exhaust to the exterior. No you cannot vent your bathroom exhaust fan into the attic. Options for venting a bathroom exhaust fan include best to worst. But while you can t have two fans with one vent you can make one fan and one vent serve two bathrooms.

There aren t many options for routing an exhaust fan to the outside of the house. The exhaust needs to vent outdoors. Bathroom exhaust fans perform an important function by removing excess moisture from your home. Ductwork is what will connect the fan to the outside.

No you should not vent a bathroom fan directly into an attic however you can vent a bathroom fan through an attic while it terminates on the roof or gable end. In all cases the ducting needs to conduct the exchaust to the building exterior and needs to terminate in an animal proof vent cover. You should never exhaust the bathroom fan directly into the attic. However that is what you do when you vent the bathroom exhaust fan into the garage.

All the moisture from your bathroom will be discharged into the garage. Bathroom ventilation fan duct routing routing a bath vent duct down out or up through an attic or roof out. This article describes routing bath exhaust fan duct upwards through an attic or roof space or downwards through a floor or crawl space. Allowing the exhaust to vent into your attic can potentially cause several moisture problems.

There are really only three venting options. 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. On 2020 02 26 by anonymous. Can i vent a bathroom fan into my attic.

Anon if i understand your original question you have a bath exhaust that is discharging into a roof cavity or space not to outside. In no case is it acceptable to just dump any exhaust fan directly into an attic. All municipalities have different requirements but some do not draw a hard line on requiring exhaust fans. Before you can start replacing your old bathroom fan you ll need to determine what the fan size is.

After a while all that moisture will condense on this equipment and this is a recipe for disaster.