Bathroom Vented Into Attic

Can you vent a bathroom exhaust fan into the soffit vents.

Bathroom vented into attic.

Bathroom exhaust fans perform an important function by removing excess moisture from your home. Options for venting a bathroom exhaust fan include best to worst. First you ll partially block your roof vent with the piping reducing the flow of cooling air through your attic. It seems like such an easy solution just leave a bathroom vent hose in an attic.

This article describes routing bath exhaust fan duct upwards through an attic or roof space or downwards through a floor or crawl 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. If you re tempted to vent your exhaust fan through an existing roof vent or even vent it into the attic don t do it. No you should not vent a bathroom fan directly into an attic however you can vent a bathroom fan through an attic while it terminates on the roof or gable end.

If you vent the bathroom exhaust fan to close to the soffit vents which are vented plates under your homes outer edge and roof your home the air can be sucked right back into the attic from the soffit. Bathroom ventilation codes require a bathroom exhaust fan to vent to the exterior not the attic for health and structural reasons. Second during cold winters you ll be blowing warm moist air onto a cold surface the roof vent and roof plywood. No you cannot vent the bathroom exhaust fan into the soffit vents.

In all cases the ducting needs to conduct the exchaust to the building exterior and needs to terminate in an animal proof vent cover.