Catalytic heaters are very efficient up to 99%. I use one in my truck and it keeps the sleeper at 70 degrees even when its 14 degrees out, and I use the low setting. In the last week I have gone through 3lbs of propane in the heater and 2lbs in my hot water tank and stove, for a grand total of $5. I have two 20lb tanks in one of my boxes (secured in quick change brackets) and could not be happier. I also have hard wired LP gas sensor (mounted near the floor), a Co2 sensor (mounted near the ceiling), and a smoke detector.
I am thinking of getting the Espar, I left a place for it, but this seems to be working.
Be sake Tootie thats all that matters,...and warm :wink:
http://www.uscatalytic.com/uscatalyt...ProductId=2319