How Do I Vent Out Attic From Bathroom Fan Through

If you vent the bathroom exhaust fan to close to the soffit vents which are vented plates under your homes outer edge and roof your home the air can be sucked right back into the attic from the soffit.

How do i vent out attic from bathroom fan through. No you cannot vent the bathroom exhaust fan into the soffit vents. Slide the vent under the shingles so they cover the top half of the vent flange. If you vent through a soffit where attic vents are often located the moisture will get sucked back up into the attic or roof venting. A grille in each bathroom attaches to ducts which then fasten to a y connector at the fan.

Depending on the location of the bathroom it may be easy to vent the exhaust fan through the roof. 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. This system is quiet too.

This is much easier to do if you have attic access because if you don t you usually have to remove some ceiling drywall and run the ducts along a joist. 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. Through the roof or an exterior gable wall. Either way the vent will have to go directly to the outside and installed with a vent hood cover.

You mount a switch in each bathroom. The building code requires a bathroom exhaust fan to vent outside the building so installation of a new bathroom fan necessarily involves installation of ductwork. It is because of this that many builders tend to advise against this method. A single exhaust exits through the roof figure a.

Apply a bead of asphalt roof cement on the bottom of the vent. Nail the lower corners with roofing nails and tar the heads. Drive nail through house wall from attic. From outside use 4 inch hole saw to cut hole for wall cap.

This involves running ductwork from the fan usually though an attic and out through the roof. The lower half of the flange sits on top of the shingles. This setup requires an in line centrifugal fan mounted in the attic drawing air simultaneously from both bathrooms see photo. Choosing a whole house fan.

This will serve as a reference point for positioning the wall cap.