I got to thinking about all the quotes for burn times. And I feel there is a whole lot of apples to oranges here. So many varialbes its hard to compare. I consider burn time to start when the stove top is at least 500 and stops when it goes below 350 because that is where the heat is. A hot bed of coals doesn't constitute burn time in my book. Sure something is burning but not enough BTU's to do any real heating. IMO a bed of coals is just something to get the next load fired off.