Raytherm Hydronic Boilers, 182-400

Raypak's family of Raytherm Hydronic Boilers, 182-400, feature 82% efficiency, rugged all-brass headers, and stainless steel burners.

Raytherm Hydronic Boilers, 182-400

Model Number Full Input in
 Flue Dia.
H-182 181,000
H-330 334,000

Available Firing Modes
H1 Mechanical modulation, setpoint 150F-210F. Sizes 330-400 only.
H3 2-Stage
H4 On-off
 H5 Mechanical modulation, setpoint 110F-170F. Sizes 330-400 only.

  • Rugged All-Brass Headers
    Resist corrosion, and are easily removed for inspection or service. AB 1953 compliant.  Glass-lined, cast-iron headers and cupro-nickel tubes are available as options.
  • Finned Copper Tube Heat Exchanger
    Single bank, straight through design delivers lowest pressure drop. Integral fins have ten times the heat transfer surface of plain tubes.
  • 80% Efficiency.  Cat I Venting.
  • Indoor/Outdoor Certified.
  • 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
    With sealed corners, reduces 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 and propane.
  • Built-in Controller With Outdoor Reset, STD On Sizes 182-280

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