Does any one know if my wood stove can burn coal. The only name on it is "The Furance Works" US Patent 4127107. It is a round boiler with the water all around and no water on back or front. There is no grate or plateform for one. The air intake is controlled by an aquastat thermostat to a 24 volt motorized damper that is either wide open or closed. I was thinking of placing a firebrick wall in the back and picking up a fine mesh grate. Short enough so I can get to the ash.