Raytherm Hydronic Boilers, 926-1758

Raypak's family of Raytherm Hydronic Boilers, 926-1758, feature 82% efficiency, cast-iron headers with copper finned tube heat exchangers, and stainless steel burners.

Raytherm Hydronic Boilers, 926-1758
Model Number Full Input in
H-926 926,000*
H-1178 1,178,000*
 H-1414 1,414,000*
 H-1571 1,571,000*
 H-1758 1,758,000*
*Propane input is 94% of stated value

Available Firing Modes
H1 Mechanical modulation, setpoint 150F-210F
H3 2-Stage
 H4 On-off
 H5 Mechanical modulation, setpoint 110F-170F
 H9 4-Stage

  • Outdoor Only
  • Cast-Iron Headers with Copper Finned Tube Heat Exchanger
    Brass headers and cupro-nickel tubes available as options.  AB 1953 compliant, single bank, straight through design delivers lowest pressure drop. Integral fins have ten times the heat transfer surface of plain tubes.
  • 82% Efficiency
  • Corrosion Resistant Steel
    Fittings are brush galvanized against rust. Heat shields are corrosion-resistant steel. Jacket has Polytuf powder coat finish.
  • 24-Volt Controls
    Are totally enclosed for protection. Door is easily removed for inspection and service.
  • Floating Return Header
    Immunizes heat exchanger from thermal shock.
  • Tube Sheet and “O” Ring Construction
    Eliminates the repair and maintenance problems associated with rolling tubes directly into a casting.
  • Interlocking Refractory Panels
    Sealed corners reduce radiation loss.
  • Stainless Steel Burners
    Maintain precise combustion at all firing rates, burns quietly and won’t clog or corrode.
  • Slide-Out Burner Tray
    Allows easy inspection and service.
  • Spark-to-Pilot Ignition
    The most dependable ignition method available.
  • Available for Natural Gas or Propane.

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