Bathroom Exhaust Fan Into Attic

Bathroom ventilation fan duct routing routing a bath vent duct down out or up through an attic or roof out.

Bathroom exhaust fan into attic.

This article describes routing bath exhaust fan duct upwards through an attic or roof space or downwards through a floor or crawl space. Bathroom fan vent code requirements include no venting to attic areas to help reduce mold or structural problems. Look for the special fans starting at 160 at heating cooling equipment. In no case is it acceptable to just dump any exhaust fan directly into an attic.

Bathroom code does address the issue of moving odor and moisture laden air from the bathroom to the outside. Bathroom ventilation codes require a bathroom exhaust fan to vent to the exterior not the attic for health and structural reasons. You mount a switch in each bathroom. 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.

Because the fan is in the attic you ll hardly hear it. A grille in each bathroom attaches to ducts which then fasten to a y connector at the fan. The best exhaust fan venting is through smooth rigid ducts with taped joints and screwed to a special vent hood. Options for venting a bathroom exhaust fan include best to worst.

Surprisingly bathroom fans are not required by some building codes. A single exhaust exits through the roof figure a. There are wall mount exhaust fans as well as ceiling exhaust fans. In all cases the ducting needs to conduct the exchaust to the building exterior and needs to terminate in an animal proof vent cover.

All municipalities have different requirements but some do not draw a hard line on requiring exhaust fans. Venting through a roof vent or exhausting them in the attic could cause moisture problems and rot. How do i properly vent a bathroom fan into an attic. Another consideration to think about is the placement of your fan.

On 2020 02 26 by anonymous. 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. No you cannot vent the bathroom exhaust fan into the soffit vents. Can you vent a bathroom exhaust fan into the soffit vents.

It needs to exhaust to the exterior. 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. Anon if i understand your original question you have a bath exhaust that is discharging into a roof cavity or space not to outside. Vent your bath and kitchen exhaust fans through the roof through a special roof hood.

Either way the vent will have to go directly to the outside and installed with a vent hood cover. If you have a bathroom with a separate enclosed toilet you ll also need an additional fan for that space.