I know this is not in the electrical code, but is there anything in the building code, mechanical code,etc.. that prohibits putting a "y" in an exhaust fan hose and running two fans to one outside vent? I know it's probably not the best, but I have a 2 story house that there is one fan vented with 6" vent and it has another fan in the same bathroom that has a 3" vent. It's a pretty long way up on an extension ladder to make another hole if it's not necessary. The fan with the 6" vent says it could have used a 4" vent, but we decided to go with the 6" for better exhaust..It is the one that has been vented to the outside eave. Thanks for the input again..

Last edited by sparkync; 08/14/13 12:01 AM.