Central fuels in New philadelphia may screen the size you need (pea stoker) but Thompson bros. mining in New springfield carries an excellent pea stoker coal for $105/ton double screened and the perfect size, phone # 330 549 3979
These things will work as a "room heater" but really work best when modified a bit and used as an "add-on" furnace piped into your ductwork. They also work better and save coal when used with a big squirrel-cage blower on the back and a "magic heat" type heat reclaimer on the exhaust. be sure to use a barometric damper and set it to -.04 to -.03 for best operation. Make sure that you leave ample loose ash in the firebox - do NOT clean it when you take out the ash, only take out the clinker(s); if you remove too much loose ash you'll have outfires. I like to set the hold-fire timer on it's maximum setting twice an hour to eliminate the chance of any outfires. don't remove any coke either (the softer porous lightweight black/grey chunks) when you remove the clinker. Set the pulley on the lowest feed setting (especially if you use thompson bros. high btu (heat) coal). once the stove has been running for a bit, you want the fuelbed to equalize (fuel being burned as fast as it's coming out) at around 6-8" diameter in the center of the firebox. adjust the air so that this happens and you don't have a smokey flame, you really don't want too much more air than is necessary to equalize the fuelbed and provide a smoke-free flame.