The Honeywell Digital Thermostat is designed for easy control of your heating and cooling system. This non-programmable thermostat features a large, easy-to-read digital display and precise temperature controls (+/- 1 degree Fahrenheit). This thermostat is designed for low volt heating and cooling systems, including milivolt and single-stage heat pumps without auxiliary heat and is easy-to-install. It works with central gas, oil, or electric furnaces and A/C, hot water systems with or without pumps, and central heating and cooling systems.