Raypak: MVB® Modulating Vertical Hydronic Boilers

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 .