Keep us updated, Lots of photos. Don't let your progress get ahead of your documentation. It happens to me all the time, people say what did it look like before? I get to ambitous, and no history. How do you figure the btu's ?
first you need to know how much btu's there are in the coal your burning btu's per lb then you need to know how many lbs
are burning at one time then multiply the btu per lb to how many lbs that is burning then you need to subtract the btu's that are loss / heat loss most stoker stoves and boiler are 75% to 80% on stoves 80% to 85 % on boilers efficient so you would subtract 20 to 30 % off of the input / btu's going into the stove now you will have your output btu's coming out of
the stove hand fired will be a little less in efficiency .
So lets say the coal your burning is 13.000 btu's per lb and the stove is set to burn 4 lbs per hr that is 52.000 btu's per hr input at 100% efficiency Now subtract lets say 25% for heat loss making the stove 75% efficient heat loss is 13.000 btu's subtract that from the 52.000 the output on the stove would be 39.000 btu's per hr is what the stove is providing for
heat more btu's per lb in the coal the more lbs per hr the more heat the stove provides Plus the higher the efficiency the more btu output the stove will have