Best Way To Vent Bathroom Fan In Attic

To be properly terminated bathroom fans should exit the home through stem vents that are specifically used for this purpose.

Best way to vent bathroom fan in attic.

Venting through a roof vent or exhausting them in the attic could cause moisture problems and rot. These stem vents should be properly connected to the bathroom ducts to ensure that moisture is traveling to the exterior not the attic space. In order to accomplish this the roof has to have a hole cut in it. This setup requires an in line centrifugal fan mounted in the attic drawing air simultaneously from both bathrooms see photo.

A grille in each bathroom attaches to ducts which then fasten to a y connector at the fan. If you vent through the roof condensation will drip back into the interior. Options for venting a bathroom exhaust fan include best to worst. This involves running ductwork from the fan usually though an attic and out through the roof.

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. 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. But while you can t have two fans with one vent you can make one fan and one vent serve two bathrooms. The best exhaust fan venting is through smooth rigid ducts with taped joints and screwed to a special vent hood.

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. Vent your bath and kitchen exhaust fans through the roof through a special roof hood. Depending on the location of the bathroom it may be easy to vent the exhaust fan through the roof. Bathroom vent exhausting into attic space.

Through the roof or an exterior gable wall.