I also find burning coal to be cleaner than wood. Not only in the chimney cleaning, but mostly the debris left behind from bringing in the wood that gets stacked in the basement. Two other advantages from my point of view....Its easier for me to bring in the 5 gallon buckets than to carry in armloads of firewood. Its a lot easier on my back to have two ton of coal delivered and dumped rather than cut up, split and stack the firewood. I still burn wood just because we have blow downs to use up, but each year I am burning more coal and giving away more firewood.