Venting A Bathroom Exhaust Fan

If your bathroom includes a steam bath steam shower or jetted tub sources of additional moisture you will need to increase the total bathroom exhaust vent capacity in cfm.

Venting a bathroom exhaust fan. Note that the bathroom vent fan must always exhaust to the outdoors. A bathroom is an ideal place for mold to take root. Bathroom exhaust fan venting code summary section r303 3.

Although this isn t always possible in attic crawl spaces you should always insulate the duct to prevent condensation problems. Also the installation of the bathroom exhaust fan will go much quicker if you ask a spouse or. Bathroom venting exhaust fan cfm adequacy.

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. You can find 4 in. Behind a gable vent.

When this section is adopted by a community it essentially says that for venting purposes bathrooms must have windows that open. Options for venting a bathroom exhaust fan include best to worst. The best exhaust fan venting is through smooth rigid ducts with taped joints and screwed to a special vent hood.

Duct already wrapped in insulation at home centers. Other venting options includes running the duct up through the roof or down through the soffit. The model codes are specifying the minimum bathroom vent fan capacity needed.

Never allow the duct to simply blow into an attic crawlspace or other enclosed area. A bathroom exhaust fan is one of the best ways to keep the humidity in your bathroom at a comfortable level and keep mold at bay.