Bathroom Exhaust Vent Terminates In Attic

The two most common locations for a bathroom vent to terminate is on top of the roof or through an exterior side wall.

Bathroom exhaust vent terminates in 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. And you would use a termination point a discharge point. 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. If you put your exhaust vent cap too close to the soffit vents it just gets drawn right back into the attic condenses and causes all the same problems.

We also review recommended clearance distances between the bath exhaust duct end opening and other building features such as a gas fired. Duct already wrapped in insulation at home centers. That will take it from the bath exhaust fan to a discharge point. The best exhaust fan venting is through smooth rigid ducts with taped joints and screwed to a special vent hood.

Air comes in through the soffit vents and exits through the roof vents depending on design and code the roof vents can be louvers in the walls on the sides of the house capped holes in the top of the roof and or an apex vent. Options for venting a bathroom exhaust fan include best to worst. You can find 4 in. No you cannot vent your bathroom exhaust fan into the attic.

Through the roof or an exterior gable wall. Although this isn t always possible in attic crawl spaces you should always insulate the duct to prevent condensation problems. The exhaust vent must terminate outdoors. Bathroom exhaust fan termination fittings locations clearance distances.

This point where the vent terminates and discharges the bathroom air should be checked for damage and to see that the air is actually exhausting properly. While this may seem obvious homeowners may out of convenience direct the vent into either of these locations. Otherwise you re inviting a moisture mold rot insect problem in the building. You should never exhaust the bathroom fan directly into the attic.

It cannot move air to a crawlspace or attic. That it is not blocked or restricted. Now where the discharge point is is going to be up to you. This section notes that air exhausted from the bathroom must be sent outdoors not indoors to the same residence or indoors to any other dwelling unit.

This article describes the proper closure or termination of bathroom exhaust fans fan ducts to prevent drafts heat loss leaks or even bird or rodent pest entry to the building.