Raytherm Hydronic Boilers, 962-1826

Raypak's family of Raytherm Hydronic Boilers, 962-1826, feature 82% efficiency, corrosion resistant steel, and is indoor only.

Raytherm Hydronic Boilers, 962-1826


Model Number Full Input in BTUH

Full Input in BTUH

Flue Dia.
H-962 962,700 885,000  14"
1,124,000 1,035,000  16"
H-1223 1,222,500 1,125,000  16"
1,336,500 1,230,000  18"
H-1468 1,467,000 1,350,000  18"
H-1631 1,630,000 1,500,000  18"
H-1826 1,825,600 1,680,000  20"

Available Firing Model
 H1  Mechanical modulation, setpoint 150F-210F
 H2  Motorized modulation
 H3  2-Stage
 H4  On-off
 H5  Mechanical modulation, setpoint 110F-170F
 H9  4-Stage

  • Cast-Iron Headers with Copper Finned Tube Heat Exchanger
    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.  Cat I venting
  • Indoor Only
  • Corrosion Resistant Steel
    Fittings are brush galvanized against rust. Heat shields are corrosion-resistant steel. Jacket has Polytuf powder coat finish.
  • Minimum Inlet Water Temperature 105F
  • 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.
  • 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
  • Stainless Steel Burners
    Maintain precise combustion at all firing rates, burns quietly and won’t clog or corrode.




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