Bath Fan Vents Into Attic

In all cases the ducting needs to conduct the exchaust to the building exterior and needs to terminate in an animal proof vent cover.

Bath fan vents into attic.

No you cannot vent the bathroom exhaust fan into the soffit vents. Bathroom fan vent code requirements include no venting to attic areas to help reduce mold or structural problems. In fact i have seen numerous houses that haven t yet had signs of mold with the bath fan venting incorrectly. Can you vent a bathroom exhaust fan into the soffit vents.

Next make sure it is securely fastened on both ends of the pipe. So what you want to do is you want to install a duct a vent duct and you can use flex duct for this. Venting through a roof vent or exhausting them in the attic could cause moisture problems and rot. I would by lying if i told you that it will cause problems it may be totally fine.

Next make sure you have one of the new roof exhaust vents on the roof and properly sealed. Bathroom ventilation fan duct routing routing a bath vent duct down out or up through an attic or roof out. How to install a bathroom vent fan. I recommend replacing the vent pipe with insulated vent pipe.

The best exhaust fan venting is through smooth rigid ducts with taped joints and screwed to a special vent hood. All municipalities have different requirements but some do not draw a hard line on requiring exhaust fans. This article series explains why bathroom vent fans are needed and describes good bath vent fan choices necessary fan capacity and good bath vent fan and vent duct installation details. Bathroom ventilation codes require a bathroom exhaust fan to vent to the exterior not the attic for health and structural reasons.

I see many questions about leaking bath exhaust vents. Bath vent fan installation building codes bath vent fan troubleshooting bath vent fan repair. That will take it from the bath exhaust fan to a discharge point. This article describes routing bath exhaust fan duct upwards through an attic or roof space or downwards through a floor or crawl space.

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. 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.

Bathroom code does address the issue of moving odor and moisture laden air from the bathroom to the outside. We explain how to install bathroom exhaust fans or vents the vent ducting. Now where the discharge point is is going to be up to you. Surprisingly bathroom fans are not required by some building codes.