These burners are factory-set to prevent flashback and provide a directed heat stream that maximizes heat transfer while minimizing NOx emissions

check for carbon buildup or replace the sensor

provided the electrical ratings are compatible

Belimo B315B valve compatibility with glycol

Reznor 209121 Fan Blade 30067439-890 These burners are factory-set toThe Reznor 209121 Fan Blade is a critical OEM replacement part designed for high static unit heater applications, ensuring optimal heat exchanger cooling and consistent CFM delivery. This 23 inch diameter fan blade features a precision engineered 35 degree pitch and a 3 blade configuration to balance air movement with motor load efficiency. Operating with a counter clockwise (CCW) rotation, it integrates seamlessly with 1 2 inch bore motor shafts,