GWC Gas-Fired Condensing Boiler

70,000 to 175,000 Btuh Input
Natural or Propane




  • AFUE's above 91%
  • Sealed combustion or Direct
    exhaust venting
  • Factory Packaged 4 sizes
  • PVC or stainless steel venting
  • Multiple pass heat exchanger
  • Cast iron primary heat exchanger
  • Stainless steel condensing
    Secondary heat exchanger
  • Control module with indicator lights
  • Hot surface ignition system
  • Insulated heavy-gauge steel jacket



  • Factory tested
  • Cast iron sections with built-in air separator
  • Stainless steel secondary heat exchanger
    with air separator
  • Blower assembly with observation port
  • Electrical junction box
  • 30 PSI ASME relief valve
  • System circulator*
  • Built-in-bypass circulator system with sensor
    for temperature control*
  • Negative regulation gas valve
  • Gas/air orifice plate for natural gas
    (separate plate provided with unit for
    conversion to propane)
  • Water treatment - inhibitor & test kit
  • Concentric vent kit
  • High altitude kit
  • Condensation neutralizer kit


Dimensions and Specifications

In PDF format:


*Circulator supplied with boiler cannot be removed and cannot be used as a zone circulator in multiple zone systems.