Venting Bathroom Fan Through Existing Roof Vent

First you ll partially block your roof vent with the piping reducing the flow of cooling air through your attic.

Venting bathroom fan through existing roof vent. However it is possible to use the existing roof vent often the duct is secured to one side of the roof vent so that it can still be used for attic ventilation. 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. Bathrooms are wet smelly places that often are closed in and unventilated. Through the roof depending on the location of the bathroom it may be easy to vent the exhaust fan through the roof.

If you re tempted to vent your exhaust fan through an existing roof vent or even vent it into the attic don t do it. Required bathroom vent fan ventilation rate in cfm. Sometimes this is preferable to do so that the roof doesn t need to be disturbed and then at a later date when replacing the roof a proper vent is added. In order to accomplish this the roof has to have a hole cut in it.

Options for venting a bathroom exhaust fan include best to worst. But you can install one fan in your attic for both bathrooms and make your bathroom quieter too. 25 or 50 cfm ft for hotels motels resorts and dormitories and a slightly more modest 20 50 cfm for private dwellings. Bathroom exhaust fans perform an important function by removing excess moisture from your home.

In this video this old house general contractor tom silva shows how to properly install a roof mounted bath fan vent. This involves running ductwork from the fan usually though an attic and out through the roof. Ideally your fan should be near the tub or shower but not right next to an air conditioning heating vent as the forced air can create currents that disrupt the bathroom fan s steady intake of. From inside the attic drive a nail through the roof directly above the bathroom vent fan.

By the diy experts of the family handyman magazine one fan two vents. Bathrooms can only benefit from some type of exhaust venting system but which type do you need and what does the bathroom exhaust fan venting. From the roof find the nail and use the utility knife to cut roof shingles from around the nail. Venting two bathroom exhaust fans through one roof duct won t work sorry to say.

Center the nail between two rafters. Moisture though is the real problem since it can create potentially hazardous mold and mildew eating away at your walls ceiling and trim.