When I ran service calls on a daily basis, I was asked a lot about programmable thermostats. The customer would ask me, “Do they really save money?” The answer to that question is, Yes!!! If you have ever left your house in a hurry and forgot to turn the light off, you probably forgot to adjust your thermostat. For example: If it is 100 degrees outside and you leave your thermostat set on 74 degrees, your air conditioning unit is going to run most of the day. You are spending money to cool your home at 74 degrees with no one there! With a programmable thermostat you can set it to 78 degrees when you leave for work and not have to worry about it running as much during the day (With no one at home). The key to saving money with your programmable thermostat is to stick to the schedule that you set. What I mean by that, is to create a schedule when you first get your thermostat and don’t touch it for 2 weeks. After 2 weeks is up, you should be able to notice changes that you could make to the schedule, so that it fits your demands. A programmable thermostat is a big change from the old mercury turn-dial thermostats but let us help you and I promise it will save you money in the long run.
This is a great example and overview about a programmable thermostat from Energy Star:
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