How To Connect Bathroom Fan To Roof Vent

The 2nd bathroom vent drips on the floor and is ruining the ceiling.

How to connect bathroom fan to roof vent.

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. If i remember correctly fans all have a check valve or flapper preventing back flow and drafting back into the room. The above scenario will work provided the following. Vent your bath and kitchen exhaust fans through the roof through a special roof hood.

The best exhaust fan venting is through smooth rigid ducts with taped joints and screwed to a special vent hood. 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. Venting through a roof vent or exhausting them in the attic could cause moisture problems and rot. From inside the attic drive a nail through the roof directly above the bathroom vent fan.

I would recommend installing a bath fan with a new vent that goes to the gable wall roof or even the soffit last choice. When inline fan is in operation air from both washrooms will vent out. Center the nail between two rafters. Ductwork is what will connect the fan to the outside.

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. You can replace the fan opening with a grill for each washroom. There aren t many options for routing an exhaust fan to the outside of the house. You may just want to go with a completely new vent the whole way most modern bathroom fans require 4 or 6 vent hoses for much better performance and lower noise.

Both washrooms must have nearly identical square. The master bathroom and the 2nd bathroom vent through the roof and through the same opening. Then add an inline fan to the remaining leg of the y adapter and run ducting to vent outside. There are really only three venting options.

The fans would be located within 5 6 feet of each other and could easily exit the roof at the same point.