The S500 coal stoker boiler is ideal for small-to-medium commercial buildings. The Coal Gun is almost fully automated. Thanks to our Thermo Ash Monitoring Control, you can be assured that your boiler is running at maximum efficiency without having to make constant alterations.
Coal Gun boilers are designed to be the ultimate boiler and need only minimal seasonal upkeep. Designed to be long-lasting, many of our units are into their fourth decade of operation. Our skilled, dedicated team makes each Alternate Heating System’s Coal Gun from premium materials. Each unit is tested thoroughly before leaving our facility to ensure it meets our high-quality standards. In fact, we guarantee that our product will have no issues with materials and craftmanship*.
Each Coal Gun comes complete with the necessary controls for safe operation. The standard equipment includes an insulated boiler jacket, totally enclosed induction, and grate motors, operating, dump, and high-limit aquastats, Thermo ash-regulating control, pressure relief valve, ash pan, and hopper with lid. The S500 also includes hopper-level controls.
Our Coal Gun boilers are among the longest-lasting heating appliances. AHS’s devotion to high standards results in a lengthy boiler life and years of trouble-free performance. The main thing is that a premium-made AHS Coal Gun will save you time and money in your heating application.
Consumption of Fuel…
A number of factors can affect how much coal is used, such as the type of installation, climate, and building construction. Because of its high efficiency, our Coal Gun utilizes less fuel than other units on the market and will greatly lessen your yearly heating costs.
*Limited Warranty
Alternate Heating Systems boilers and furnaces are warranted from issues in materials and workmanship for the given time:
- Boiler Vessel – 20 Years pro-rated
- Grate S500/S1000 – 12-months full
- All other components, both manufactured by Alternate Heating Systems and purchased from vendors, will have a warranty ranging from 30 days to 1 year.
Alternate Heating Systems offers a copy of the complete warranty text detailing coverage, limitations, warranty claim procedure, and state law rights.
- Simple to Use
- Smoke Free
- Minimal Maintenance
- Cost Effective
- Fuel Efficient
- Versatile Applications
- Lifetime Durability
- Standard ASME Certification
BTU/hr
500,000
Typical Heating Capacity (sqft)
15,000
Weight (lbs)
2,200
Flue Size (in)
8
Fuel Type
Pea, Nut Anthracite
Optional Backup Fuel
N/A
Hopper Capacity (lbs)
350
Approximate Water Capacity (gal)
56
Width (in)
58
Height (top of hopper) (in)
74
Length (in)
82
Return Tapping (NPT) (in)
(2) 2
Supply Tapping (NPT) (in)
(2) 2
Electric Requirements
220V, 60Hz, 20Amp
Extended Base
The Extended Base upgrade for the S500 gives it an extra-large ash pan that is 3x bigger than the standard ash pan, which greatly extends the time period between emptying. It also makes the ash pan accessible to front-end loaders making dumping the ash hands-free.
Domestic Coil
This Domestic Coil features a 100° F rise at 5 gallons per minute, 50° water inlet temperature and 65 PSI water pressure. It is threaded into a 4 IN NPT threaded fitting provided on the boiler for this purpose.
Warnock Hersey Certification
WH certification is available on all Coal Gun boilers for an additional charge. This certification assures that the boiler complies to UL 2523 Standards. Some insurance companies may require this certification and it is the responsibility of the homeowner to determine the need for a WH certification on any boiler purchased.
Auger Loading
The Coal Gun can be enhanced with an auger add-on that eliminates the need to manually fill the hopper. This is especially important on the large models (S500, S1000), as a higher demand for heat requires more regular filling. Auger add-ons have both automatic and manual settings for maintaining coal reserves.
4″ or 6″ Diameter
Your choice of diameter will depend on load size and cleanliness of coal. If your coal typically has debris, like wood chunks, a 6″ auger would be recommended. Auger length can be customized per requirements.
Auger Inlet Guard
An auger inlet guard provides added safety. The guard’s sturdy mesh screen prevents unwanted objects from contacting the auger screw.
Low Water Cutoff
A Low Water Cutoff senses the water level in the boiler’s vessel and will shut the unit down if the water level drops to an unsafe level.
