Robertshaw 9204V Vertical Thermostat 2-Wire 1-Heat 24V

The Robertshaw 9204V Thermostat is a single-stage heating control thermostat with a vertical-mount dial design. It has a temperature range of 50°F to 90°F for better indoor climate control. It used an SPST switch and heat anticipation that is compatible with millivolt systems to keep the room temperature constant. The 24V unit detects temperature in the surrounding condition and turns on the heating system if necessary and shuts off after a while to prevent overheating. This thermostat is better suited for furnaces or heating-only HVAC systems as it provides energy efficiency, steady heat and does not require elaborate programming.