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WOC70 Multi-Fuel Boiler

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  • Optional Fuel Backup

The WOC70 Multi-Fuel Boiler operates at a maximum 265,000 BTU/hr output. It can heat any building varying from 3,000 – 7,000 sqft. They are ideal for those searching for a flexible, long-lasting boiler capable of burning a mixture of fuels, including liquid fuels.

The WOC70 can be equipped with an Automatic Switchover feature, which switches from coal to oil if the water temperature falls because of a lack of fire. This option is available only with a fuel oil burner. The Automatic Switchover choice provides you with the flexibility and freedom to be aware that your home will not go cold if you, for example, decide to take a break for the weekend.

The WOC70 comes standard with:

  • Separate firing chamber for backup burner
  • Legacy Grate System
  • Giant 14” Loading Door
  • Automatic Dual Draft System – Forced Draft Blower and Natural Draft Damper
  • Firebrick Lined Firebox
  • Water Cooled Baffle (for increased efficiency)
  • Hydro Approved to 60PSI
  • Made out of ¼” Steel Plate
  • Honeywell Aquastats
  • Temperature/Pressure Gauge
  • ASME Approved Pressure Relief Valve
  • Load Door Smoke Flap

The WOC70 Multi-Fuel boilers’ cost of ownership is one of the cheapest out there—$40.00 – $50.00 on average every year!

Conventionally, Multi-Fuel boilers have been marketed as wood/coal combinations. However, because of EPA Phase 2 rules, these units are no longer marketed for constant use with wood.

To see our Multi-Fuel boilers that do not have an oil burner option. Click here WC70.

For automatic feeding boilers, please browse our Wood Gun or Coal Gun product series.

Assembled Specifications

BTU/hr

265,000

BTU/hr Oil or Gas

250,000

Typical Heating Capacity (square ft)

3,000-7,000

Weight (lbs)

1,630

Flue Size (in)

8

Fuel Type

Wood*, Hard Coal, Soft Coal

Optional Backup Fuel

Fuel Oil, Propane, NG, Waste Oil

Standard Door Opening

14x14

Firebox Capacity (cubic ft)

14

Firebox Length (in)

36

Water Capacity (gal)

75

Width (in)

28

Height (in)

59

Height to Flue Opening (Center) (in)

45

Depth (in)

40

Coal Capacity (lbs)

250 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 SwitchingFor #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.
Domestic Coil

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.