In last weeks newspaper was a front page article saying Maine is instituting an outdoor wood boiler buy back program. Don't call them, they'll call you. If you have one that has been the root of many neighborhood complaints the state will step in and try to get you to clean up your act. If your outdoor boiler cannot be made to run without disturbing the neighbors with smoke & smell, they will buy your boiler, up to $10,000 and force you to get a cleaner burning one, or none at all.
If I lived in Maine, I would be burning nothing but paper in mine. Reason being is the fire doesn't get enough air to burn the paper. It chugs thick white smoke out the stack. THICK I actually made traffic almost stop once. I didn't realize it was going to do that. Loaded it up with cardboard from something.
If I burn seasoned hardwood mine smokes less that most in house stoves around here.