Honeywell TP971A2003 Pneumatic Day/Night Thermostat 2-Pipe Direct Acting 50°F-90°F

The Honeywell TP971A2003 Pneumatic Day/Night Thermostat is used for accurate control of temperature in HVAC systems that use two pipes. This direct-acting thermostat works within a 50°F to 90°F range and controls heating or cooling depending on the pneumatic pressure signals. Originally designed for use with pneumatic HVAC control systems in commercial structures, it changes between day and night temperature settings for energy conservation. Its pneumatic operation makes it possible to have consistent temperature control, and the day/night setback improves the comfort of the building’s conditions.