I am heating with a vogalzang pot belly stove straight from china courtesy of northern tool haha .During the day I burn oak mixed with ky white ash lump bit. and at night before bed i put in about half a scuttle of pa hard coal nut sized. the hard coal holds fire great all night but it seems to form alot of klinkers but thats ok. but my favorite still has to be tn or ky bit man alive it will make the heat.