My DAD likes to use those damn things and I tell you what, they make me SICK. I don't know what it is, but I get nauseous whenever I'm around those things. There are also small heaters that use propane tanks. They heat up a ceramic core with a propane flame, and I personally find them to smaller, safer, and more efficient than kerosene. I'll try to find out which hardware carries them, brand name and stuff like that.
Have you made use of insulation on hoses, under, and backside of tank/sump/et al?
