• DUO Power Stainless Steel Water-Tube Heat Exchanger
  • Commercial Range from 299 to 470 MBH Inputs
  • High Efficiency up to 95.1% AFUE (CH-299), up to 95.6% Thermal Efficiency (CH-399, CH-499)
  • Intuitive Control for Easy Use and Setup
  • Display can be set to 1 out of 18 different languages
  • Built in cascade control for up to 16 boilers
  • Easy Installation and Service – wall hung with removeable side panels
  • Twin Pipe Venting with included 3-in-1 Adjustable Boiler Vent Connector For Different Vent Materials
  • PVC, CPVC, Polypropylene, and Stainless-Steel Venting
  • Advanced Safety Features for Peace-of-Mind
  • Natural Gas or easily converted to propane (LP)
  • 8 Year Heat Exchanger Limited Warranty
    3 Year Parts Limited Warranty

Additional Connections:

  • On/Off thermostat or modulating thermostat
  • 0-10 VDC remote flow temperature (set point) control
  • 0-10 VDC remote boiler input control
  • External indirect tank circulator of diverter valve
  • Boiler circulator
  • PWM control for boiler circulator
  • System circulator
  • External flow switch or external safety device
  • Modbus
  • External system sensor
  • DHW indirect sensor or aquastat

Optional Outdoor Reset

See Installation, Operation and Maintenance Manual for complete instructions