Reznor 123665 Burner 321142-301 the 632489R is designed specifically

the 632489R is designed specifically for negative pressure (vacuum) sensing at -0

this 3-blade propeller is designed for CW rotation (clockwise) to pull or push air effectively through the coil

the internal spring return pushes the stem up to keep the valve in the fully open position

you know that maintaining precise combustion airflow is critical for the Ultra 155 gas boiler to operate at peak efficiency and avoid lockout codes

preventing automatic restarts after a safety trip until a technician inspects the system

Reznor 123665 Burner 321142-301 the 632489R is designed specificallyThe Reznor 123665 Burner is a precision engineered replacement component designed for compatibility with specific Reznor gas fired unit heaters and duct furnaces. As a critical part of the combustion assembly, this natural gas burner ensures optimal fuel to air ratios and consistent flame stability across high output heating cycles. Built to OEM specifications, the 123665 provides a direct fit solution for maintaining thermal efficiency in commercial