I purchased a new (well old) home (actually it’s a townhouse) several months back and finally have moved into the one and only bathroom. I made sure that when the electrician came in he wired 2 switches on the wall and left a wip in the rafters so I could install an exhaust fan. I finally cut the hole and it fits very nicely into it. I connected the power and boy does it work well. I the attic is directly above the bathroom and is currently unfinished and will remain that way. It looks like there is blown insulation up there currently.

Here is my issue:

I have the switch taped off now because I am concerned that I obviously need to vent the air outside. I know that just venting into the attic could over time create some really nasty mold. There are currently 2 air vents opening to the outside and I was wondering if I were to use some flexible dryer hose to run from the fan into some elaborate PVC contraption that will utilize one of the existing vents. Again, I do not want to be cutting holes into the roof.

Thanks for the help.