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it includes the essential components for the burner heat exchanger and the lower sight glass
Field Serviceable Design: Large flat diaphragm construction permits easy removal and replacement
shielding internal sensitive components from environmental debris
4" Water Column (WC) set point to monitor critical airflow and prevent hazardous exhaust buildup or carbon monoxide risks
Lennox 23M20 Temp Sensor 326058-758 it includes the essential componentsEngineered for high precision environmental control, the Lennox 23M20 is a commercial grade averaging zone sensor kit designed to provide stable temperature data to Prodigy and CORE Unit Controllers. This wall mounted, non communicating solution utilizes a 22k NTC thermistor to eliminate hot and cold spots in large open plan spaces or multi zone environments. Operating within a 40F to 95F range, the Lennox 23M20 Temp Sensor maintains an impressive