Bathroom Exhaust Vent Terminates In 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.

Bathroom exhaust vent terminates in attic.

The exhaust vent must terminate outdoors. Options for venting a bathroom exhaust fan include best to worst. 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. Otherwise you re inviting a moisture mold rot insect problem in the building.

The best exhaust fan venting is through smooth rigid ducts with taped joints and screwed to a special vent hood. Exhaust air from toilet rooms and bathrooms shall not discharge into attic crawl space or other areas inside building. No you cannot vent your bathroom exhaust fan into the attic. Do not simply terminate a bath vent fan duct in an attic as shown in our photo above nor can you just dump the exhaust vent into a crawl space nor into a closed wall floor or ceiling cavity.

The two most common locations for a bathroom vent to terminate is on top of the roof or through an exterior side wall. Your attic is an enclosed cold zone. Your attic is not a temperature controlled environment is never the same temperature as your living space and generally closer to the temperature outside. That will take it from the bath exhaust fan to a discharge point.

Can i vent a bathroom fan into my attic. All municipalities have different requirements but some do not draw a hard line on requiring exhaust fans. You should never exhaust the bathroom fan directly into the attic. It seems like such an easy solution just leave a bathroom vent hose in an attic.

Now where the discharge point is is going to be up to you. Example model ventilation codes. That it is not blocked or restricted. Duct already wrapped in insulation at home centers.

Surprisingly bathroom fans are not required by some building codes. Although this isn t always possible in attic crawl spaces you should always insulate the duct to prevent condensation problems. You can find 4 in. So what you want to do is you want to install a duct a vent duct and you can use flex duct for this.

Bathroom code does address the issue of moving odor and moisture laden air from the bathroom to the outside. Bathroom exhaust fans perform an important function by removing excess moisture from your home. It has the same temperature as the outside which in winter across the northern us will be below freezing. A vent fan evacuates warm and usually very humid air from your bathroom or kitchen you re most often venting steam from a shower or from boiling pots pans.