Economical Energy Consultant, Inc.: Coal Gun

Call: 717-360-6828

Coal Gun

The Coal Gun™ has proven itself a reliable money saver over a 33 year period in a wide variety of commercial applications. In some applications, coal may reduce fuel costs by as much as 70%, and the investment in a Coal Gun may have less than a 2 year payback! It is ideally suited for commercial applications requiring process hot water, such as:

  • Car washes
  • Egg processing plantsS260 Coal Gun
  • Motels
  • Laundromats

Heating applications such as:

  • Steam, hydronic and radiant heating
  • Residences
  • Apartment houses
  • Retail stores
  • Greenhouses
  • Manufacturing plants
  • Repair shops

The Paragon of Efficiency in Coal Fired Heating

The Coal Gun acheives its excellent efficiency via more complete combustion and by great thermal transfer from the flu gases to the water jacket. As one indicator of efficiency, the Alternate Heating Systems LLC. Coal Gun™ Stoker Boiler operates with the coolest stack temperatures of any coal boiler on the market.  The stack temperature of a Coal Gun™ normally runs at less than 320 degrees fahrenheit. Low stack temps mean that more heat is scrubbed from flue gases than is the case for other boiler designs. This means more heat with less coal for you.

How the Coal Gun™ works...

Clean burning anthracite coal is typically transferred from a large coal storage bin to the hopper by means of a spiral auger. Residential units can be hand-loaded. Commercial boilers are (with very few exceptions) fed by augers. The coal is fed by gravity from the hopper into the coal inlet tube.  Other than the auger that feeds the hopper, there are no moving parts in the coal feed mechanism making the system very reliable.  The only moving part that touches any component of the coal is the grate, which removes the ashes; and the Coal Gun™ grate plate has a lifetime warranty.  A fan-induced draft pulls air through the combustion chamber and fire tubes, spinning it through the swirl chamber and into the cyclone separator which removes most fly ash, dropping the ash onto the grate system. The fan also creates a vacuum in the unit eliminating most fly ash leakage. The Coal Gun™ is clean, safe, trouble free and operates on pea and buckwheat-sized hard coal.

Coal Gun Cutaway

Using Fly Ash to Self-Clean the Swirl Chamber

Fly ash that is produced by the Coal Gun is put to good use - the system is designed so that the fly ash scours the inside of the swirl chamber, preventing buildup that can dramatically lower combustion efficiency.  After scouring the swirl chamber, the little fly ash that remains from the combustion process is deposited in an ash pan that can be easily removed and dumped during routine ash removal.


Coal Gun™ Coal Stoker Boiler Specifications*
MODELS130S260S500S1000S1500
Width 22" 26" 34" 40" 45"
Height 42" 47" 58" 66" 77"
Length 48" 62" 82" 102" 118"
Weight (lbs - approx.) 875 1,276 2,200 3,800 5,000
Water Capacity (gal - approx) 27 56 115 220 380
BTU/Hr 130,000 260,000 500,000 995,000 1,650,000
Flue Size (NPT) 5" 6" 8" 10" 12"
Return Tapping (NPT) 1 1/2" (2) 1 1/2" (2) 2" (2) 2 1/2" (2) 2 1/2"
Supply Tapping (NPT) 1 1/2" (1) 1 1/2" (1) 2" (2) 2 1/2" (2) 2 1/2"


Gal/Hr Capability for Process Hot Water, Based on 100° Rise
Model Hot Water Capacity (gal/hr)
S260 250
S500 500
S1000 1,000
S1500 1,650

ASME Requirement and Availability

The American Society of Mechanical Engineers certification is available on any of our boiler lines for an additional charge. This certification assures that the pressure vessel has been designed and constructed in accordance with the ASME Code. This certification is required for nearly all commercial installations. The certification is also required for some residential installations depending upon local codes.

AHS Quality...

Every AHS coal boiler is manufactured from the highest quality materials by highly trained, dedicated technicians. Every unit is tested extensively before it leaves our factory to ensure its adherence to our high standards of quality.  Each Coal Gun™ comes complete with all controls necessary for operation and safety.  All motor and drive mechanisms are totally enclosed.  Standard equipment includes an insulated boiler jacket, totally enclosed motor and drive systems, primary and backup aquastat thermostats (hot water units), low water cut-off on commercial units (models S500 and above), and a pressure relief valve (steam units).

Our Coal Gun™ boilers are some of the most durable heating units available. The AHS commitment to quality leads to a long boiler life (some reported at 30+ years and counting) and years of hassle-free operation. The bottom line is that a quality-manufactured AHS coal stoker boiler will save you both time and money in your heating application.

The Alternate Heating Systems Water Wall

Each Alternate Heating Systems boiler, heater and furnace is designed so that every piece of steel is in contact with the water in the system that is used to transfer heat to your radiant floor heat system, radiator, baseboard hot water, or heat exchanger.  This design ensures the most rapid and efficient heat transfer from the firebox into the water.  Efficiency is increased compared to other boilers that do not have this feature by allowing less heat to escape from the boiler surfaces before it is captured in the water.

S1000 Coal Gun

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