Keystoker Hot Water Boilers units can give you automatic heating at the lowest possible cost. You can definitely benefit by the use of anthracite coal and at the same time eliminate the time and work demanded by hand-feeding. A large silent air circulating blower will assure complete circulation of warm, filter-cleaned air throughout every room in the house. The Keystoker Hot Water Boilers are built to deliver maximum heat at the lowest initial investment and lowest operational cost. The down draft multi-pass steel boiler, is entirely surrounded by water filled walls, forcing hot vapors to brush the entire inner surface to maximize the amount of heat extracted. The heating surface is properly proportioned to the grate area, resulting in appropriate balance and greater heat delivery per pound per fuel burned.

Features

• No Moving Parts in the Fire Box
• Heavy gauge steel ensures Long life, 25 year expectation
• Automatic heat without costly repairs
• Burns two sizes of hard anthracite coal (Buckwheat and Rice)
• Sealed pit ash removal assures clean operation
• Low cost fuel is the key to heating economically
• Reliable, heavy duty factory built gear box
• Large and Silent Blower for quiet operation
• Belts, shear pins, and worm conveyors have been eliminated
•  Entire unit factory assembled and fully tested
• Room thermostat
• Timer combination bonnet control
• Boiler Gauge
• Low stack outlet traps heat in the boiler
• Copper coil provides instant hot water
• 5galons of water per min from the domestic water coil
• Small secondary combustion motor- ensures maximum burning of coal, increases boiler efficiency, and reduces coal consumption

Specifications

 http://www.keystoker.com/product/product-manuals/