engineered for high-cycling industrial and HVACR applications

enabling you to capture long-term performance trends without leaning on a continuous PC connection

Exact OEM Match: Engineered specifically for Lennox equipment

When replacing an older Trane expansion valve

fitting various Rheem-Ruud SP20075 series tank models seamlessly

Lochinvar & A.O. Smith 100304140 Control Board Refrigerant engineered for high-cycling industrial andThe Lochinvar & A. O. Smith 100304140 Control Board is a critical main control board designed for high efficiency Knight Fire Tube boilers, specifically the WHB285 and KHB285 models. As a central component of the SMART SYSTEM operating control, this board manages complex hydronic functions, including 10: 1 turndown ratio modulation, blower speeds, and gas valve timing. It effectively processes real time data from water temperature sensors and flame