I'm wondering if a furnace is workable in these caps? I have the impression that since they are not as insulated very well the furnace would operate much longer than normal.
you could take one of these caps, add rigid insulation very easily and panel the inside (thats all thats in a FWC)
a propex furnace would be a relatively simple install, or one of the diesel heater options, if wanting to use an atwood/dometic you would have to make sure they frame an opening in the wall for it to be fit thru.
one of the bigger issues, is these are just a cap, not a full camper, so theres no floor/lower walls, just the truck bed, but id say a furnace is certainly possible.
