It's nice to see a lot of coal burning folks here. As you can see, I'm in Scituate.
I started burning coal in 1985, keeping a fire in a Glenwood Home Grand #107 in the kitchen. A wood stove in the living room would also be going. After awhile, it seemed like I was too old to be chasing trees. I got a Harman Mark II for the living room.
It worked out so well, I obtained a 2nd one for the kitchen. My bride's mother has taken up residence, and she asks if the stove can put out more heat when the room is 89, and the answer is yes, but ..... as a matter of fact, the Mark II in the kitchen was left open about 3 turns and ignored for a couple of hours and the candle sticks across the room drooped, and some house plants dried up and died. Normally it's about 1/2 a turn. The stove may be a bit larger than required for the space, but was undamaged, and wasn't even glowing.
I have burned all the coal shown in my avatar, which was about 32 tons and came as a one shot deal. I'm looking for another delivery, and getting only 22 tons sounds good. I hear my brother in Wakefield may also want a load.
I was a machinist from '64 to '01 when I retired. At one time I was running a stainless steel water tube boiler I made, in parallel with the oil burner. It heated the water very well and you could hardly tell there was a wood fire in it. An aquastat would kick the pump in when the stove heated the water, but I made an error. I figured rather than pay to have the water tube assembly heat treated and quenched, to remove the welding stresses, I'd start a hot fire with a lot of kindling while the water tubes were empty, and open up a ball valve to quickly fill the water tubes. It worked like a charm, but the pressure relief valve opened for about 20 seconds, and the wife was at home. She didn't feel safe with it thereafter, and I could not say the valve would not open if the stove was going and we lost power for the aquastat and circulator pump. So, I just used it while I was at home to check that it worked, and used it when the temperature was in the 10 degree or colder range. After a while I took it out and put in a Chubby for the coldest days. Since I went to all coal, and 2 Harmans, I didn't need that either. I'm thinking that if I went with steam under vacuum I could boil water at 90 degrees and have the steam condense in the remote bedroom with no pump. Probably never do it, though. Whoops, the bottom is squeezing. Nice talking to you all