Bathroom Exhaust Fan Venting Into Attic

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Bathroom exhaust fan venting into attic. No you cannot vent your bathroom exhaust fan into the attic. In order to accomplish this the roof has to have a hole cut in it. You ve now put the water right back up into the attic without realizing it. The best exhaust fan venting is through smooth rigid ducts with taped joints and screwed to a special vent hood.

It will consequently cost you time and energy in cutting through. 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. Although this isn t always possible in attic crawl spaces you should always insulate the duct to prevent condensation problems. The vent hood will have a little flap that opens when air is blowing through the vent but at other times it will remain closed.

You should never exhaust the bathroom fan directly into the attic. Most professionals believe that the roof should not be cut unnecessarily. How do i properly vent a bathroom fan into an attic. A bathroom exhaust fan is usually required.

It would be a waste of time to buy a contemporary fan to find out it is not of the same dimensions are the pre existing one. Before you purchase your new bathroom fan inspect the fan you want to replace. 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. Typical bathroom ventilation codes such as the 2006 irc specify that a bathroom toilet vent fan must provide 20 cfm if the fan runs continuously and 50 cfm if the fan runs intermittently presumably switched on and off manually or by a timer.

Either way the vent will have to go directly to the outside and installed with a vent hood cover. Depending on the location of the bathroom it may be easy to vent the exhaust fan through the roof. Note that in some states a mechanical exhaust fan may. It is because of this that many builders tend to advise against this method.

Just a year ago i saw the absolute best bath exhaust fan roof cap. This involves running ductwork from the fan usually though an attic and out through the roof. Are exhaust fans required for a bathroom. Duct already wrapped in insulation at home centers.

Bathroom ventilation codes require a bathroom exhaust fan to vent to the exterior not the attic for health and structural reasons. I wish it had been. What this means is that in colder weather the vented air with moisture in the air will mix with the attic air causing condensation to form due to the warm air from the bathroom and it doesn t have to be. Not all building jurisdictions require bathrooms to have an exhaust fan if the bathroom has an openable window that has 1 5 square foot of open area when open.

If no openable window then a mechanical exhaust system i e. Your attic is not a temperature controlled environment is never the same temperature as your living space and generally closer to the temperature outside. In this article you can get a step by step guide on how to replace a bathroom exhaust fan without attic access.