Features:

  • 84% Efficiency Cat I venting.
  • Cast-iron headers with copper finned tube heat exchanger standard. Brass headers and cupro-nickel tubes available as options. AB 1953 compliant.
  • Minimum required inlet water temperature 105F.
  • Modulating gas valve and burner, up to 1.7:1 turndown.
  • Engineered with precisely matched system components.
  • Smallest installed footprint (5.4 square feet) design fits tight spaces and easily replaces larger boilers.
  • All models indoor/outdoor certified.
  • Certified under SCAQMD Rule 1146.2. Meets all Low NOx regulations.
  • Suitable for altitudes up to 10,000 ft. (derate above 5,000 ft.).
  • Inline combustion air filter (MERV8).
  • Available for natural gas or propane.
  • ASME Section IV constructed and stamped. National Board Registered AB 1953 low lead compliant.
  • Multiple pump outputs – Boiler Pump, System Pump, Indirect Pump.
  • Whisper quiet operation.
  • VERSA IC® control package with built-in outdoor reset function.
  • On-board diagnostic center, English, no codes.
  • 0-10 VDC BMS Interface (setpoint or direct drive).
  • Built-in cascade function for up to 4 boilers.
  • Complete cabinet protects all controls and wiring.
  • Tough rust-resistant powder coat finish.
  • Modbus® RTU port (RS485).

Options:

  • Outdoor air sensor (B-32).
  • Indirect sensor .