Vent Bathroom Fan Through Existing Roof Vent

The 2 pipes one a 4 master and the other a 3 2nd do not go through the ceiling but into a common box that goes through the roof.

Vent bathroom fan through existing roof vent. The master bathroom and the 2nd bathroom vent through the roof and through the same opening. This setup requires an in line centrifugal fan mounted in the attic drawing air simultaneously from both bathrooms see photo. It should not be used for double duty for a bath fan exhaust. 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.

As a slant back vent the original photo shows it installed backwards. The contract nicely wrapped the exhaust hose around the fan and installed the roofing with out re plumbing it. First you ll partially block your roof vent with the piping reducing the flow of cooling air through your attic. This is a ridge mounted slant back roof vent it s used to ventilate attic air to the outside.

It is best to install a fan to it s own dedicated roof vent. The good majority of bathroom fans are vented through the roof while some people are choosing to soffit vent them as an alternate. All the floor joists have some kind of wiring or vents running through them. The 2nd bathroom vent drips on the floor and is ruining the ceiling.

This old house general contractor tom silva shows how to properly install a roof mounted bath fan 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. Warm moist bathroom air will condensate on its underside and can cause moisture damage mold on the roof sheathing. The bathroom exhaust pipe would be pushed up to the screen i wouldn t be cutting the existing vent secured by a box with a 4 in hole cut in it to hold the pipe exactly that will be attached to one of the supports holding the existing gable vent.

Installing metal roofing vents by doityourself. The existing vent is louvered with a screen behind it. You can find 4 in. It is really a matter of choice as to where the bathroom fan is vented to the outside as long as it exhausts directly outside.

Duct already wrapped in insulation at home centers. A single exhaust exits through the roof figure a. See below for a shopping list and tools subscribe. A grille in each bathroom attaches to ducts which then fasten to a y connector at the fan.

Bathroom fan vent size pipe material exhaust bath fan through attic and roof install roof vent for bathroom fan if you cannot walk across the image of bathroom and closet 20000 reviews of the best bathroom and closet pictures.