Best Way To Vent Bathroom Fan In Attic

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.

Best way to vent bathroom fan in attic.

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. Through the roof or an exterior gable wall. These stem vents should be properly connected to the bathroom ducts to ensure that moisture is traveling to the exterior not the attic space. 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.

This involves running ductwork from the fan usually though an attic and out through the roof. To be properly terminated bathroom fans should exit the home through stem vents that are specifically used for this purpose. If you vent through the roof condensation will drip back into the interior. Bathroom vent exhausting into attic space.

But while you can t have two fans with one vent you can make one fan and one vent serve two bathrooms. A grille in each bathroom attaches to ducts which then fasten to a y connector at the fan. 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. Either way the vent will have to go directly to the outside and installed with a vent hood cover.

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. 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. Venting through a roof vent or exhausting them in the attic could cause moisture problems and rot.

Depending on the location of the bathroom it may be easy to vent the exhaust fan through the roof.