i want to upgrade my current 5510 (move it to the garage) and buy a new harman. im thinking of maybe going coal this time. im thinking of maybe buying a harman dvc 500 coal stove or a harman p38 pellet. i know that coal stove is more expensive but i believe that coal is a much more economical unit to operate, coal tends to be cheap and hot. i was wondering how much more dust a coal stove develops vs. pellets. i read that a dvc 500 is a direct vent. does that mean that it vents much like a pellet stove? i was also looking at the harman magnum stoker. does anyone else know anything about this stove. it appears to have a room filter which would keep the air cleaner. if the dvc 500 is the cheaper stove to vent and not require a full expensive chimmney that would probably be the option i would take. i would also like to hook it up to a thermostat and it appears that stove can be set up that way. if i dont go with coal, i will go with a P68 most likely.