Bathroom Exhaust Fan Venting In Attic

Let me tell you.

Bathroom exhaust fan venting in attic.

You should never exhaust the bathroom fan directly into the attic. Although this isn t always possible in attic crawl spaces you should always insulate the duct to prevent condensation problems. Duct already wrapped in insulation at home centers. 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.

It s all outdoor air anyways right. Bathroom ventilation codes require a bathroom exhaust fan to vent to the exterior not the attic for health and structural reasons. Through the roof or an exterior gable wall. The best exhaust fan venting is through smooth rigid ducts with taped joints and screwed to a special vent hood.

No you cannot vent your bathroom exhaust fan into the attic. No you should not vent a bathroom fan directly into an attic. You can find 4 in. Improperly ending a bathroom vent inside an attic can lead to unintended consequences and builders have stopped this bad practice many years ago.

Your attic is not a temperature controlled environment is never the same temperature as your living space and generally closer to the temperature outside. Bathroom fan vent code requirements include no venting to attic areas to help reduce mold or structural problems. It seems like such an easy solution just leave a bathroom vent hose in an attic. One attic mounted fan for two bathrooms one in line centrifugal fan can be mounted in the attic to exhaust the moisture from two bathrooms.