I use a Coleman (something)Cat (BlackCat, BearCat, SportCat -- can't remember) if I want the heat to stay on a while. In Jerome when the weather got nipply enough to wake me up at night I just got up and turned on my single burner (10,000+ BTU) propane stove for a few minutes. It uses a LOT more propane because it's a direct flame but 10,000 BTU vs the 3,000 BTU catalytic -- it doesn't have to run near as long. The problem catalytic heaters is the fact that you need to pack your raincoat and rubber sheets if you use them in a smal enclosed area like a bus. You can bust your butt having the outside repainted and rustproofed then rust it out from the inside if you use a catalytic on a regular basis. Anything made of paper or cloth will be wet enough that you feel a need to dry it out if you use one overnight. I have an Eberspacher BN-4 boxed up for later but it's going to take some fiddling with. I want room for an aux battery (or batteries) and a few other gizmos so it may not be able to go in the stock location even though I have a bit more room back there in my Bay. G2