Myth: Programmable thermostats aren't that green
Reality: A lot of people seem to think that once a programmable thermostat turns off your heat or AC at a preset temperature, the cost of reheating or cooling their home back to a comfortable temperature outweighs the savings. But the fact remains: The longer your heating or cooling system is turned off, the greater the savings. In the winter, lowering your thermostat 10 to 15 degrees for 8 hours a day can save you up to 10 percent on your heating bills. Just set it to turn up the heat by the time you get home.