The Keystoker A-120 is an automatic coal burning warm air furnace that touts excellent efficiency as well as great heating ability. This clean coal furnace produces up to 120,000 BTUs to keep your home comfortable and warm throughout the cold seasons.

There are couple great patented features built right into this automatic coal furnace. The patented flat grate design gives this efficient coal furnace a deeper firebox, allowing for much hotter combustion which results in much greater efficiency, and a lot more heat to be used for warming your home. The patented built in heat exchanger forces the hot gases from the fire to the bottom of the furnace, and then back up through 4" pipes allowing the blower to force hotter air out of the furnace and into your home. With the temperature this coal furnace burns at combined with the rice or buckwheat anthracite coal that is used as fuel, a clean coal combustion is achieved that produces very little pollution. And with a Honeywell thermostat, this automatic coal furnace puts out heat based on the temperature that is set on the thermostat, and what the temperature in the house is at currently. If it's colder than desired, the furnace will run hotter.

With such great heating capability at a low price, this automatic coal burning furnace can heat a wide variety of homes cleanly and efficiently.

• Keystoker A-120 Coal Furnace Owner's Manual

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