WOC55 Multi-Fuel Boiler

Ten Year Warranty

The WOC55 Multi-Fuel Boiler is capable of producing 225,000 BTU/hr and will heat homes ranging from 2,000 to 5,500 sqft. It is a multi-fuel boiler perfect for homeowners looking for a simple, well-made boiler that can burn various fuels. Plus, the WOC55 allows the convenience of liquid backup all in one unit.

All WOC boilers can be upgraded to include an automatic switchover feature to oil if the water temperature drops due to a lack of fire. This option gives you the flexibility and freedom of knowing that your home will not go cold if you, for example, decide to go away for the weekend.

Standard Equipment

The WOC55 Multi-Fuel Boiler comes standard with

  • #2 Fuel Oil Burner with Manual Switch-Over
  • Legacy Grate System
  • Large 14” Loading Door
  • Automatic Dual Draft System – Forced Draft Blower and Natural Draft Damper
  • Firebrick Lined Firebox
  • Water Cooled Baffle (for increased efficiency)
  • Hydro Tested to 60PSI
  • Constructed of ¼” Steel Plate
  • Honeywell Circulator Control Aquastat
  • Temperature/Pressure Gauge
  • ASME Tested Pressure Relief Valve
  • Load Door Smoke Flap

The WOC55 Multi-Fuel Boiler’s cost of ownership is one of the lowest in the industry! $40.00 – $50.00 per year on average!!

Traditionally, Multi-Fuel boilers have been sold as wood/coal combinations; however, due to EPA Phase 2 regulations, these units are no longer sold for continuous use with wood.

To view our Multi-Fuel boilers that do not have an oil burner option. Click here WC55

Please explore our Wood Gun or Coal Gun product lines for automatic feeding boilers.

  • Pressurized Vessel
  • Flexible Fuel Options
  • Oil/Propane/Natural Gas Backup available
  • Easy Maintenance
  • Cost Effective
  • Fuel Efficient
  • Lifetime Durability
  • None Electric Option
Call For Pricing(717) 987-0099
Assembled Specifications



BTU/hr Oil or Gas


Typical Heating Capacity (square ft)

2,000 - 5,500

Weight (lbs)


Flue Size (in)


Fuel Type

Wood*, Hard Coal, Soft Coal

Optional Backup Fuel

Fuel Oil, Propane, NG

Standard Door Opening


Firebox Capacity (cubic ft)


Firebox Length (in)


Water Capacity (gal)


Width (in)


Height (in)


Height to Flue Opening (Center) (in)


Depth (in)


Coal Capacity (lbs)


Electric Requirements

110V, 60Hz, 15Amp

Propane/Natural Gas Backup

Fuel oil backup is standard for WOC models but propane or natural gas back up options are available for an additional cost.

Automatic/Manual Switching

For #2 fuel oil, the backup system can function in an automatic switch-over scenario, with fuel oil taking over when the boiler has exhausted its coal fuel. For other fuels, such as natural gas or propane, switch-over is manual only.

Alternate Heating

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.

Insulation Jacket

Our base unit Multi-Fuel boilers have no insulation on the outside of the boiler, allowing maximum heat radiation in the boiler room. If you prefer to circulate more of this heat, an insulation jacket can be added to the boiler. This insulation jacket is comparable to that used on the Wood Gun or Coal Gun boilers

ASME Certification

The ASME Certification guarantees the steel grade and weld quality of the boiler water jacket. Each ASME Certified water jacket has been pressure tested to 60 PSI, and includes a 30 PSI release valve.

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. Available with automatic reset or manual reset.