Bathroom Exhaust Fan Venting In Attic

It seems like such an easy solution just leave a bathroom vent hose in an attic.

Bathroom exhaust fan venting in attic.

If you have two bathrooms that are close together and one has an exhaust fan and the other doesn t you might be wondering if you can tie a new exhaust duct into the existing one. Although this isn t always possible in attic crawl spaces you should always insulate the duct to prevent condensation problems. No you should not vent a bathroom fan directly into an attic. Bathroom fan vent code requirements include no venting to attic areas to help reduce mold or structural problems.

Bathroom ventilation codes require a bathroom exhaust fan to vent to the exterior not the attic for health and structural reasons. Your attic is not a temperature controlled environment is never the same temperature as your living space and generally closer to the temperature outside. Let me tell you. Options for venting a bathroom exhaust fan include best to worst.

Improperly ending a bathroom vent inside an attic can lead to unintended consequences and builders have stopped this bad practice many years ago. It s all outdoor air anyways right. However you can vent a bathroom fan through an attic while it terminates on the roof or gable end. You should never exhaust the bathroom fan directly into the attic.

You can find 4 in. Through the roof or an exterior gable wall. Duct already wrapped in insulation at home centers. The best exhaust fan venting is through smooth rigid ducts with taped joints and screwed to a special vent hood.