I just added two Camco Olympian Wave Gas Catalytic Heaters to my toy hauler. A 6000 BTU heater in the garage area and a 8000 BTU in the main living area. Both are plumbed in with propane quick connects.
The one in the garage is mounted to the wall.
The one in the living area is a free standing.
When traveling they ride together in the garage. Piggy backed together. It takes less than a minute to setup and take down the free standing heater.
I now don't have to listen to my batteries being depleted on a cold winter night. There is absolutely no smell off of these heaters. I borrowed a friends Blue Flame Mr Heater and used it for one night. There was a definite odor it made.
I do not worry about dying in my sleep with these heater either. I have used the same heater in my truck camper for the last 10 years, only it is a smaller 3000 BTU unit. Never a problem.
In the process I also plumber in a BBQ quick connect so that bottle of propane by the BBQ is a thing of the past.
I won't be so excited about these heaters when it turns summer time there in Arizona.
Arlan