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 .