The single wall 90,000 BTU and the double wall 105,000 BTU stoker stoves using the patented built in heat exchanger and flat grate stoker design gives you the highest possible efficiency in a coal stove.
Our boilers are built with heavy gauge high quality American made steel and are equipped with a copper coil that will produce 5 gallons of hot water every minute. The Keystoker warm air furnace is built to deliver maximum heat. The downdraft heat exchanger increases heating surface permitting direct circulation of every thermal unit into the warm air leader pipes for rapid distribution.
Keystoker --a leader in the industry SINCE 1946
The Keystoker 160,000 BTU double wall constructed Koker furnace has a 9" wide flat grate stoker and patented thermal heat exchanger. This popular furnace can be used as an add-on or used freestanding to heat a small home