This is what my buddy uses to heat his entire bike shop all winter. This is a U. S. Army Cannon Heater #20 that'll take 24" splits of pretty much any size. The amount of heat this stove throws is truly incredible. You need to stand next to it to appreciate its size (over 4 foot tall). Apparently they were used to heat army barracks. They are built like tanks and they seem to last forever. I believe they were manufactured from 1900-1920 and were used in both WW1 & WW2 as well as the Korean War. He bought it from a shop around here that specializes in restoring old stoves like this.