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Hydronic D4 - {13,700 BTU/hr}

Espar's Hydronic 4 Coolant Heater offers affordable heating solutions for off-road equipment, small trucks, automobiles and boats. Its compact size enables a simple installation and eliminates the need for electrical plug-ins. Diesel (D) and Gasoline (B) versions are available.
Features and Benefits include:
  • Automatic heat regulation through 3 heat levels
  • Low fuel and power consumption
  • No electrical plug-ins
  • Easy start up of equipment
  • Self Diagnostics


  • Heat Output
    BTU/hr(KW)
    Fuel Consumption
    Gal/hr (L/hr)
    Electrical Consumption
    12V model shown
    14,700 (4.3) High
    8,200 (2.4) Low
    Diesel 1, 2 or Kerosene
    0.11 (0.40) High
    0.05 (0.20) Low
    4 amps (High)
    1.9 amps (Low)
    Water Throughput Weight Dimensions
    238 US gal/hr (900L/hr) 6.4 lbs. (2.9 kg) L= 9.75" (25 cm)
    W= 3.5" (9 cm)
    H= 6.3" (16 cm)

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