Venting Bathroom Fan Through Soffit Or Roof

And the closer the termination is to the soffit vents that supply ventilation air to the attic the more likely that moisture from the bathroom will be drawn into the attic.

Venting bathroom fan through soffit or roof.

By exhausting warm moist air in that area you will most certainly cause a mold problem in your attic usually very evident on the underside of the roof sheathing close to the area where where the exhaust outlet is found play it safe. Vent your bath and kitchen exhaust fans through the roof through a special roof hood. The master bathroom and the 2nd bathroom vent through the roof and through the same opening. The alternative to a roof exhaust if you re concerned about not being able to seal the hole in the roof is to exhaust through a gable end.

However natural air flow from the outside will bring. The 2nd bathroom vent drips on the floor and is ruining the ceiling. When a bathroom exhaust duct terminates in a soffit it drips. Cooler air which is found under your roof overhang soffit is drawn up through the perforations of the soffit and exhausted through your roof venting system.

The 2 pipes one a 4 master and the other a 3 2nd do not go through the ceiling but into a common box that goes through the roof. Venting through a roof vent or exhausting them in the attic could cause moisture problems and rot. This eliminates the need for you to make a hole in the roof or your walls. The point of a bathroom exhaust vent or any vent really is to remove hot moist air from the house.

The best exhaust fan venting is through smooth rigid ducts with taped joints and screwed to a special vent hood. If you are looking for a diy install roof ventilation is a risky job. A down through soffit exhaust vent design by leaving warm air in the exhaust duct when the fan is off creates a heat trap that reduces heat loss out of the bathroom through the exhaust fan duct when the fan is off in comparison with up routed vents or even horizontal vents through a gable end wall. But if you have a vent several feet away 10 feet is required for noxious exhaust but bathroom exhaust is not considered dangerous and not subject to this you do not have a problem code wise or not.

And while both a roof vent and an overhang vent perform this task there is one big difference. Even for the second story bathroom you can access the attic to vent the moisture outside. Going through the roof guarantees it will go up in the air and away from your home i would love to see a copy of the building code that suggests venting a bathroom fan through the soffit is recommended. As the warm moist air leaves the bathroom through a soffit it leaves in a downward motion.

Yes you can vent the bathroom fan through soffit. So then the argument is that your humid bathroom exhaust comes out and is sucked back into the attic by the soffit vents built into most roof attic systems. Opposed to the traditional practices of venting a bathroom fan through a side wall or roof you can also vent it through a soffit which is much preferable in some cases as we will see in this article. Can i vent bathroom fan through soffit.