Reznor 121275 Blocked Vent Switch

The Reznor 121275 Blocked Flue Stack M/R ECO is used in preventing accidents in commercial heating systems by finding and stopping blockages in the flue and overheating. It measures the temperature of the flame and stops the unit at 275°F when airflow is blocked. A manual reset switch is triggered by the sensor to stop the system if there is too much heat. Made for Reznor HVAC systems units, it also improves safety, extends the life of the equipment and support efficient maintenance by spotting ventilation problems early.