I am going to take a try at burning coal this year and bought a used Crane 404 a well proven design not as good as an old base burner from the early 1900's but a known quantity and plenty to be found and plenty of people that gladly offer advise as to how to get the most out of them. Water is really not an issue and the better coal is washed before it is bagged or delivered bulk. You don't have to season it and contains more btu per unit in using wood by the cord and coal by the ton. Toxins are microscopic and pretty much blown out of proportion by those selling alternate fuels as opposed to actual scientific studies and checks for them. To say it all the same is like saying all wood is the same and varies by type and what vein at what mine it came from. I am going to try it to get to 12 to 24 hours between dealing with the stove and will be switching over this week. If anyone is curious in the differences I experience will be glad to report back here. I have no plans of leaving this forum when I switch as have made plenty of online friends.