We burn rice coal at work, the feed for it is like a pellet stove only heavier castings because it burns hotter, to burn coal in a wood stove you should really have a fire brick liner.
My parents haven't bought fire wood for a while, but last time they did, about 3 years back, it was $700 or so for 8 cords worth of red oak logs, now they just burn dead elm trees off their property.
People often think of heating with wood as "free heat" but when you look at buying wood or even just your time, gasoline and need to own a chainsaw, it can be a costly way to heat your house, lucky for my parents I've done a fair amount of work on their house, adding insulation, replacing windows, replacing their wood furnace with a better model and they've cut back on their wood use by nearly half.
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