Hi, new to the forum. I had a Newmac wood/coal/oil combo installed 2 years ago to replace a very similar (but larger) DM Olsen combo unit. I had always burned wood, but getting tired of all the work and mess. My brother-in-law was given a coal stove and coal in exchange for some construction work, and we became interested in coal after hearing about his experience with it, and inquiring at a new coal business that opened up about 30 miles away. Then when I got a flyer from Tractor Supply (6 miles away) with coal prices $60/ton less than the other guy, I bought 3 tons.
Just built my first coal fire Sunday. Followed the directions in my owner's manual and advice I found on this and other forums, (although there isn't much out there on these furnaces), and have fell in love with coal heat! Temps were in the low twenties Sunday and Monday night and yesterday it warmed into the mid forties and was still there last night. I had a good cal bed when I went to bed and only added a little and closed the draft down to minimum. When I got up this morning, only had a small spot glowing in the corner, and since it was still mid forties, I let it go out. Looking forward though to seeing how it will work for us in the long run.