Best Way To Vent Bathroom Fan In Attic

The correct way to vent a bathroom fan through an attic is to terminate the vent either to the roof or to the gable wall.

Best way to vent bathroom fan in attic.

Perhaps some confusion about up or down venting also arises because it is good practice for an overhead fan duct to slope down 1 8 to 1 4 per foot so that any condensation in the fan drips out of the wall vent or soffit vent rather than back into the bath ceiling. This setup requires an in line centrifugal fan mounted in the attic drawing air simultaneously from both bathrooms see photo. To be properly terminated bathroom fans should exit the home through stem vents that are specifically used for this purpose. The best exhaust fan venting is through smooth rigid ducts with taped joints and screwed to a special vent hood.

Vent your bath and kitchen exhaust fans through the roof through a special roof hood. Venting through a roof vent or exhausting them in the attic could cause moisture problems and rot. Bathroom vent exhausting into attic space. 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.

But while you can t have two fans with one vent you can make one fan and one vent serve two bathrooms. Through the roof or an exterior gable wall. 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. This involves running ductwork from the fan usually though an attic and out through the roof.

I recommend that my clients vent their bath fans out a gable wall if at all possible when not using an hrv or erv that is. Either way the vent will have to go directly to the outside and installed with a vent hood cover. Options for venting a bathroom exhaust fan include best to worst. A grille in each bathroom attaches to ducts which then fasten to a y connector at the fan.

These stem vents should be properly connected to the bathroom ducts to ensure that moisture is traveling to the exterior not the attic space.