the bottom line is what is the stack temperature?? I believe that the stack temp on the DS will equal the stack temp in a chubby when the DS is burning twice or three times the coal.. The chubby is a small heater, the DS is a monster.. comparing grapes and watermellons..
lobsterman wrote:LsFarm wrote:ut 40# per day burnt in a small stove will not transfer as much heat into a room as 40# of coal burnt in a stove with a larger heated skin surface area.. unless the stove is terribly inefficient, and a hopper fed stove, like the DS is not ineffiecient.. or we'd have lots of comments, threads on the 'excess coal used' etc.. and we don't have that for the DS units..
Efficiency = heat in room divided by energy released in combustion.
40 lbs per day burned in the Chubby has ALMOST ALL THE ENERGY going into heat in the room. You cannot do better than that with the world's largest stove! At very high rates, yes, the big stove will win. Perhaps Fire is in this regime. I was just questioning the sanity of the Chubby /DS comparison on a per pound burned basis.