Re: advice on venting a propane fridge?
For the past 20 years, i have just used the 3 inch round vents on the roof for the friges. you can get them at camping world. As for the side doors, you may or may not need a vented panel, depending on what other lower vent you may have right there, but for sure, you need one so that you can get to the back of the frig for service, so one large enough to do everything without removing the frig is a good idea. And metal enclosure for frig is good idea.
Jesus Christ... Conversion in progress.