Does anybody have a marathon logwood boiler (wood/coal)? I currently have one (like it) and have been using it for one heating season. The model I have is the ycob36. This unit can be converted to a gravity feed unit in case of a power outage. The unit can burn 220lbs of coal. I am getting ready to heat my water with a domestic coil. I have hotwater baseboard heat. I am currently adding in floor radiant heat also. I am currently burning freeport bitominous coal. I will be getting some anthracite coal next season.