Programmable Thermostat
Programmable thermostats automate schedules for when you want your house to be at different temperatures. For example, you can set it to turn down the heat in winter when you are out during the day or sleeping in the evening and warm the house back up at the time you specify.
Be sure to find one that is compatible with the wiring of your existing thermostat. Depending on your heating system, you may have two, three, four, or five wires, and your switching may be high-voltage or low voltage. Beyond that, look for one that has a friendly user interface and is easy to program.
By programming your thermostat to lower temperatures in winter (higher temperatures in summer), you can save energy while maintaining comfort. You can schedule the temperature to adjust to being just right when you want it.
The first thermostat appeared almost 400 years ago (in 1620), when Dutch inventor, Cornelis Drebbel fabricated a mercury thermostat to help regulate the temperature of his chicken incubator.