How To Connect Bathroom Fan To Roof Vent

Venting through a roof vent or exhausting them in the attic could cause moisture problems and rot.

How to connect bathroom fan to roof vent.

If i remember correctly fans all have a check valve or flapper preventing back flow and drafting back into the room. Vent your bath and kitchen exhaust fans through the roof through a special roof hood. The above scenario will work provided the following. The 2nd bathroom vent drips on the floor and is ruining the ceiling.

The master bathroom and the 2nd bathroom vent through the roof and through the same opening. In this video this old house general contractor tom silva shows how to properly install a roof mounted bath fan vent. 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. 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.

Then add an inline fan to the remaining leg of the y adapter and run ducting to vent outside. When inline fan is in operation air from both washrooms will vent out. You can replace the fan opening with a grill for each washroom. 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.

There aren t many options for routing an exhaust fan to the outside of the house. I would recommend installing a bath fan with a new vent that goes to the gable wall roof or even the soffit last choice. Ductwork is what will connect the fan to the outside. Center the nail between two rafters.

Both washrooms must have nearly identical square. From inside the attic drive a nail through the roof directly above the bathroom vent fan. The fans would be located within 5 6 feet of each other and could easily exit the roof at the same point. With that in mind if they were both plumbed into one vent it should be no problem right.

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.