I have previously posted a question here about whether or not to have my bathroom exhaust fans vented out of the roof? I received a resounding yes? In regards to that question, I have two exhaust fans in my home. In orer to minimize the number of holes in my roof, can I have one hole in the roof and install a coupler that that allows you to hook two hoses to it? I'm assuming that there is something like this? Is this a good idea to do this?