Bathroom Exhaust Fan Venting Options

Ductwork is what will connect the fan to the outside.

Bathroom exhaust fan venting options. Bathrooms require exhaust venting fans in some communities this section may be in lieu of section r303 3 or in addition to it. The flex duct makes the bends easy don t kink it and allows the fan to be repaired from below in the future. 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.

Never allow the duct to simply blow into an attic crawlspace or other enclosed area. Note that the bathroom vent fan must always exhaust to the outdoors. A window is a simple duct fan alternative.

I d recommend venting out the gable. For that length i don t think you need to worry. Other venting options includes running the duct up through the roof or down through the soffit.

Avoid using inexpensive flexible duct flexduct to vent a bathroom fan. It can crush or tear easily which will impede air flow. Although this isn t always possible in attic crawl spaces you should always insulate the duct to prevent condensation problems.

You can also shop for fans with features such as heaters timers and specific decor styles. You may be able to configure a short route. There are really only three venting options.

Other ventilation options are windows and fans that blow the air into another room. 25 or 50 cfm ft for hotels motels resorts and dormitories and a slightly more modest 20 50 cfm for private dwellings. Bathroom ventilation is required by law to prevent the buildup of mold so ducted ventilation is one option people have.