Our standard ship-heater boiler units have a vertical, fire tube, two pass top-fired design. The combustion chamber comprises the first pass and the return tubes fire the second pass. The base of the boiler is insulated from the deck by air space and a wet bottom section. The boilers are made with marine welded construction with full penetration welding techniques as used in high pressure boilers. Designed for marine heating operation at 30 PSI hot water or 15 PSI steam. The top cover is insulated and easily removable for periodic cleaning, a clean-out opening in base of boiler is included, and observation ports in top and base. WAY- WOLFF steam boilers have U.S. Coast Guard certification, and the hot water boilers are built in accordance with U.S. Coast Guard requirements complying with A.S.M.E. Boiler Code.

Oil Burner

WAY-WOLFF oil-burners are specially integrated fully automatic, high pressure atomizing type. A self-priming fuel pump draws oil from the storage tank. In addition to a mechanical shut-off valve in the fuel pump, an electric oil shut-off is provided for extra safety. Oil pressure and vacuum gauges are also provided. The ignition is automatic electric spark, which is on DC application fed from a special AC take off on the burner motor-inverter. The safety stack control shuts the burner off in case of ignition or flame failure. Burner operation is controlled by an adjustable limit control on the boiler.

Fuel Oil

  • Reference domestic fuel oil per Commercial Spec. CS12-48 grade 2
  • Diesel fuel oil per Military Spec. MIL-F-16884. A.P.I
  • Gravity – 26° to 33°
  • Viscosity – 40 S.S.U. at 100° F max


  • Direct current 115 volts.
  • Alternating 110 or 220 volts, 60 cycles, single phase

Standard Equipment

Boiler complete with:

  • Combustion chamber in place
  • Insulated steel jacket
  • Oil burner assembly
  • Combustion safety control
  • Adjustable limit control
  • Safety relief valve

Hot water boiler furnished with:

  • Pressure-temperature gauge

Steam boiler furnished with:

  • Steam pressure gauge, low water cutoff
  • Gauge and fittings

Boiler Ship Heater Dimensions (Inches or I.P.S.)







Ship Heater

*Capacities based on Fuel Oil of 140,000 BTU/Gal. and minimum efficiency of 75%
*Steam Radiation 240 BTU/Hr.
*Hot Water Radiation 150 BTU/Sq. Ft.
*H20 30 PSI Max
*Steam 15 PSI Max