I hardly have any smoke coming out of my chimney, but I burn seasoned wood and burn hot with a fairly recent (1993) woodstove. My neighbor, however, who sells firewood (much, much more than me) burns in a woodstove that "came with the house" and everytime that he's burning it looks like steam emitting from a nuclear power plant. Is this an indication that he is burning unseasoned wood, wet wood, and using a not-very efficient stove? Occasionally he has a load of wood sitting in the back of his truck ready for delivery, and you only have to get within 12 feet or so to smell the aroma of the freshly-cut splits. To each his own-but he really smogs up the neighborhood!