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.

Typically you can take that out to the nearest side wall like a gable wall and bring it right through the wall. Otherwise you re inviting a moisture mold rot insect problem in the building. Your attic is not a temperature controlled environment is never the same temperature as your living space and generally closer to the temperature outside. A lot of options.

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. It cannot move air to a crawlspace or attic. Duct already wrapped in insulation at home centers. We also review recommended clearance distances between the bath exhaust duct end opening and other building features such as a gas fired.

And you would use a termination point a discharge point. You can find 4 in. Bathroom exhaust fan termination fittings locations clearance distances. Options for venting a bathroom exhaust fan include best to worst.

No you cannot vent your bathroom exhaust fan into the attic. While this may seem obvious homeowners may out of convenience direct the vent into either of these locations. 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. 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.

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. That will take it from the bath exhaust fan to a discharge point. The exhaust vent must terminate outdoors. 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.

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 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. That it is not blocked or restricted. Now where the discharge point is is going to be up to you.

You should never exhaust the bathroom fan directly into the attic.