DesertDave, I have my fan wired to run with the compressor. I did put in a switch to turn it off, I just leave it on all the time. I might move the switch next to the fuse box just to get it out of the way. See
my build for more information.
Bill
EDIT: DrJ how much noise does 3 fans make? I can hear mine outside but not inside the camper unless I am next to the fridge. I only have a top vent, do you have one or two vents?
Bill,
Your build out is fantastic and the fan is a good idea. I had a similar setup because I took out a 3 way fridge. I have the upper and lower vent. The lower vent I just put a piece of foam over to insulate. The top vent is still open like yours.
I can hear the fans running from outside. Inside is barely audible. They are all computer fans and quiet.
I have slept just fine with them on before, but usually turn them off at night. I don't think the fridge runs as much then.
PS
I think we just hit 100 posts on this thread. I'm glad some of the information has been helpful and appreciate the ongoing discussion.