Dometic Vent fan cover?
On my last trailer I got one of these to cover the vent fan on the roof:
It was great because it mounted to the vent frame so you didn't put any holes in your roof. We loved it because it allowed you to keep your vent open in the rain.
Unfortunately it won't work on the dometic vent fan housing in our new 23DBH. The vent frame is (for lack of a better way to describe)... doube walled, making it incompatible.
Wondering if anyone knows of an similar item that DOES work on these fans. (sorry... dont know fan model #. I looked but nothing is visible).