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 fans would be located within 5 6 feet of each other and could easily exit the roof at the same point. 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. The master bathroom and the 2nd bathroom vent through the roof and through the same opening. 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.

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. Then add an inline fan to the remaining leg of the y adapter and run ducting to vent outside.

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. The best exhaust fan venting is through smooth rigid ducts with taped joints and screwed to a special vent hood. In this video this old house general contractor tom silva shows how to properly install a roof mounted bath fan vent.

You can replace the fan opening with a grill for each washroom. There are really only three venting options. Venting through a roof vent or exhausting them in the attic could cause moisture problems and rot. Vent your bath and kitchen exhaust fans through the roof through a special roof hood.

When inline fan is in operation air from both washrooms will vent out. 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. No matter the location of the bathroom you can vent the exhaust fan through the wall. The above scenario will work provided the following.

If i remember correctly fans all have a check valve or flapper preventing back flow and drafting back into the room.