Honeywell TP971A2029 Direct Acting Pneumatic Day/Night Thermostat 60°-90°F

The Honeywell TP971A2029 Day/Night Stat is a pneumatic thermostat used to regulate temperature in your house or office. This works by taking a reading of the surrounding air temperature and using that information to send a signal to your forced-air heating or cooling system, which turns it on or off to maintain the temperature you want. You may set various temperatures during the day and night using this thermostat's two distinct settings. For instance, you could program the temperature to be warmer during the day when you're more active and colder at night when you sleep.Your HVAC system won't have to work as hard to maintain a constant temperature throughout the day, which will save you money on utility bills and energy.