How To Vent Bathroom Exhaust Fan In Attic

In general you can try venting a bath vent fan down but the combination of down direction elbows and total run length may mean that it s ineffective.

How to vent bathroom exhaust fan in attic.

This is much easier to do if you have attic access because if you don t you usually have to remove some ceiling drywall and run the ducts along a joist. Your attic is not a temperature controlled environment is never the same temperature as your living space and generally closer to the temperature outside. Through the roof or an exterior gable wall. Look for the special fans starting at 160 at heating cooling equipment dealers.

Although this isn t always possible in attic crawl spaces you should always insulate the duct to prevent condensation problems. Bathroom ventilation codes require a bathroom exhaust fan to vent to the exterior not the attic for health and structural reasons. Options for venting a bathroom exhaust fan include best to worst. Because the fan is in the attic you ll hardly hear it.

You should never exhaust the bathroom fan directly into the attic. 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. The best exhaust fan venting is through smooth rigid ducts with taped joints and screwed to a special vent hood. You mount a switch in each bathroom.

This system is quiet too. Either way the vent will have to go directly to the outside and installed with a vent hood cover. The correct way to vent a bathroom fan through an attic is to terminate the vent either to the roof or to the gable wall. This involves running ductwork from the fan usually though an attic and out through the roof.

It is because of this that many builders tend to advise against this method. No you cannot vent your bathroom exhaust fan into the attic. Depending on the location of the bathroom it may be easy to vent the exhaust fan through the roof. Take a look at the installation manual for your fan brand and model.

The building code requires a bathroom exhaust fan to vent outside the building so installation of a new bathroom fan necessarily involves installation of ductwork. A grille in each bathroom attaches to ducts which then fasten to a y connector at the fan. You can find 4 in. A single exhaust exits through the roof figure a.

Duct already wrapped in insulation at home centers.