Energy Star recommends that instead of keeping your space at one temperature throughout the day, you should change it based on your schedule. There are two ways you can do this: A programmable thermostat allows you to customize the heating and cooling schedule based on when you’re home and away. 5-2 thermostats allow you to set one schedule for the weekdays and another for the weekend. 5-1-1 thermostats allow you to set one schedule for the week, one for Saturday, and one for Sunday. A 7-day thermostat allows you to set a different temperature for each day of the week. If you spend a considerable amount of time away from home, save money and energy by setting your thermostat at a comfortable temperature when you come home, and a more energy-efficient temperature when you leave. With a non-programmable thermostat, you must change the temperature manually using the switch controls. If someone stays at home all day and can continuously change the temperature throughout the day, consider this type. Non-programmable thermostats adjust better to weather changes such as large temperature swings between day and night or cold fronts and heat waves.