Great info Weldon- thank you! I found a site that sold the unit you were talking about! But man oh man! $62 for a new vent cover... ug!
I would really love to lose the vent and put in a fan, (and, in turn, not waste $62 but rather, put it towards a fan...) but then I am back to the dilemma of not having the right sized hole.
How hard is fiberglass patching I wonder???
Closing down the vent and putting a fan in it's place could be problematic. One of the problems is that you almost have to the run the fan all the time to get any ventilation. Which might be alright if you're connected to shore power, but boondocking
it would put a drain on the battery
. When Scamp installs a roof fan they cut another hole and keep the large vent working.
I was talking to gentleman at Bullards Beach last year that put a MAXX Air fan in place of his 14 x 14 vent, Casita
trailer. He had to keep the fan running all time. Even then it still felt stuffy in his trailer.
Just another thought.
P.S. I live in Oregon and never felt the need for a ceiling fan. The large vent takes care of things almost all the time. I bought a constant breeze fan (12 Volt) and have used it twice in the 2.5 years and 100+ camping nights I've have my trailer.