I got to looking at my neighbors basement and he showed me what he used to heat his house these days. Its a nice pretty one and well made but its nothing but a barrel stove. Best of all he has it encased in a tin walled room and above it is an old hot water heater around 30 gallons. painted black. He has that plumbed into his boilers super cell and it pretty much heats all his hot water. Using a hot water tank allowed him to put the pressure safety valve on top and plumb right in. What a simple rig. I will never laugh at a barrel stove again. Best of all he said he made the insurance company come out and it passed muster for them. I don't know if the hot water rig was on there at that time but it surprised me they were ok with a barrel stove in the basement to begin with.