Supco SHL509 Plenum Thermostat

The Supco SHL509 SPST Plenum Thermostat is an essential switching component designed for use in commercial systems. It opens at 240F and closes at 210F to regulate or interrupt electrical circuits based on plenum air temperature. It is commonly installed in ductwork or air handling units where over-temperature protection is required. The component supports control auxiliary components such as fans, dampers, or safety shutdown circuits by responding to elevated heat conditions within HVAC systems. It acts as a control element that supports proper system operation in high-temperature air distribution in commercial and industrial settings.