The Aprilaire® Model 8465 Thermostat is a programmable thermostat that allows you to create personalized programs based on your lifestyle. This enables you to control your heating and cooling system for total comfort and efficiency. Energy savings - Set back the temperature overnight and when you're away. According to the U.S. Environmental Protection Agency, a programmable thermostat can save you up to 30% on energy costs annually. Progressive recovery - This feature ensures your home is always at your desired temperature by activating the heating and cooling equipment prior to a scheduled setting; so your desired temperature is assured just when you want it.