• Efficiency: Mid-Efficiency
  • Capacity:
    • Natural Gas (D Models): 75, 112.5, 150, 187.5, 225, 262, 299 MBH
    • Propane (DP Models): 70, 105, 140, 175, 210, 245, 280 MBH
  • Heat Exchanger: Cast Iron
  • Combustion: Atmospheric
  • Venting: Chimney Vent
  • Boiler Type: Hot Water
  • Boiler Control Module: Fuel Smart Hydrostat Temperature Limit, LWCO and Boiler Reset Control with Circulator Relay and Domestic Hot Water Input Override
  • User Display Interface: Temperature LED Display with dial-type settings and diagnostic indicator lights
  • Heat Exchanger: Cast Iron Sections with Cast Iron Push Nipples
  • Combustion: Completely Installed and Wired Gas Control System consisting of: Titanium Composite Burners, Gas Manifold with Orifices, Automatic Redundant Combination Gas Valve, 24 Volt with Pilot Filter and Regulator Intermittent Pilot Control, Continuous Retry 100% Shut Off, Combination Burner/Electrode/Flame Sensor
  • Safety: Flame Roll-Out Safety Shut-Off (Fuse Link) and Blocked Vent Safety Shutoff Manual Reset Disc Thermostat (Spill Switch) with Spare Fuse Link included
  • Other
    • Assembled Boiler with Insulated Jacket
    • Integral Draft Diverter
    • Vent Damper
    • Combination Temperature/Pressure Gauge
    • Circulator Pump Wired with 5′ Harness for Supply or Return Field Mounting
    • 3/4″ Drain Valve
    • 30lb. ASME Relief Valve

  • Natural Gas and Propane Conversion Kits
  • High Altitude Conversion Kits
  • Fill-Trol


This is my 2nd boiler and I have lived in my home for 58 years. It is made to last!!!

Donald Kandefer
Product Reviewed:
WPSB Series 3