Raytherm Hydronic Boiler, 514-824

Raypak's family of Raytherm Hydronic Boilers, 514-824, feature 82% efficiency, floating return headers, and corrosion resistant steel.

Raytherm Hydronic Boiler, 514-824


Model Number Full Input in
 Indoor Flue Dia.
H-514 511,500*
H-724 726,000*

*Propane input is 94% of stated value

Available Firing Modes

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
    Brass Headers and cupro-nickel tube 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.
  • Indoor/Outdoor Certified.
  • Corrosion Resistant Steel
    Fittings are brush galvanized against rust. Heat shields are corrosion-resistant steel. Jacket has Polytuf powder coat finish.
  • 82% Efficiency Cat I Venting.
  • 24-Volt Controls
    Totally enclosed for protection. Door easily removed for inspection and service.
  • Floating Return Header
    Immunizes heat exchanger from thermal shock.
  • Tube Sheet and “O” Ring Construction
    Eliminates repair and maintenance problems associated with rolling tubes directly into a casting.
  • Interlocking Refractory Panels
    Sealed corners, reduces radiation loss.
  • Stainless Steel Burners
    Maintains precise combustion at all firing rates, burns quietly, won’t clog or corrode.
  • Slide-Out Burner Tray
    Allows easy inspection and service.
  • Spark-to-Pilot Ignition
    Most dependable ignition method available.
  • Available for Natural Gas or Propane.

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