HooDoo, we carry a catalytic propane heater and seldom use the furnace. It is a two panel Kozy World and it heats our trailer easily. A plus is that you don't have to listen to the furnace fan.
2011 Eagle 330RLTS with just about every option.
Dodge SRW 1 ton Cummins powered.
I was born with nothing and I still have most of it left.