In Attic Bathroom Vent Fan

Both bathrooms are vented by a single in line fan that has one exhaust vent running through the roof.

In attic bathroom vent fan.

Through the roof or an exterior gable wall. It seems like such an easy solution just leave a bathroom vent hose in an attic. It s all outdoor air anyways right. If you vent through the roof condensation will drip back into the interior.

No you should not vent a bathroom fan directly into an attic. Bathroom code does address the issue of moving odor and moisture laden air from the bathroom to the outside. While insulating you can make some mistakes. However you can vent a bathroom fan through an attic while it terminates on the roof or gable end.

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. No you cannot vent your bathroom exhaust fan into the attic. The bathroom exhaust ventilation fan disperses air through an opening in the fan housing which is usually 3 inches in diameter and ideally faces in the direction of the ventilation system outlet. Ceiling fans vent either into the attic or outside through the roof.

Bathroom ventilation codes require a bathroom exhaust fan to vent to the exterior not the attic for health and structural reasons. Bathroom fan sound levels sone rating refers to the sound level of a fan. Improperly ending a bathroom vent inside an attic can lead to unintended consequences and builders have stopped this bad practice many years ago. You should never exhaust the bathroom fan directly into the 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. Wall mount fans are mounted on an external wall of a home and are used if there isn t a way to vent through the roof as in the case of a bathroom on the first floor of a home. Let me tell you. A 3 or 4 inch duct connects to the outlet on the fan housing and runs to a side wall or to the roof and connects to a vent cap that allows the exhaust to disperse outdoors.

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. Options for venting a bathroom exhaust fan include best to worst. To avoid mistakes not running it at all consider installing switches with built in timers. All municipalities have different requirements but some do not draw a hard line on requiring exhaust fans.

Bathroom fan vent code requirements include no venting to attic areas to help reduce mold or structural problems. Before you rush to the attic or go the roof to check for any leaks make sure the exhaust fan duct is properly insulated and run the fan more frequently for a prolonged period. Each fan vents separately out the roof. Each bathroom has its own exhaust fan.