Bathroom Vent Through Attic

The master bathroom and the 2nd bathroom vent through the roof and through the same opening.

Bathroom vent through attic.

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. You mount a switch in each bathroom. In all cases the ducting needs to conduct the exchaust to the building exterior and needs to terminate in an animal proof vent cover. A single exhaust exits through the roof figure a.

Look for the special fans starting at 160 at heating cooling equipment. Bathroom ventilation fan duct routing routing a bath vent duct down out or up through an attic or roof out. No you cannot vent the bathroom exhaust fan into the soffit vents. The 2nd bathroom vent drips on the floor and is ruining the ceiling.

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. 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. Vent your bath and kitchen exhaust fans through the roof through a special roof hood. This system is quiet too.

The best exhaust fan venting is through smooth rigid ducts with taped joints and screwed to a special vent hood. Because the fan is in the attic you ll hardly hear it. The vent hood will have a little flap that opens when air is blowing through the vent but at other times it will remain closed. Venting through a roof vent or exhausting them in the attic could cause moisture problems and rot.

A grille in each bathroom attaches to ducts which then fasten to a y connector at the fan.