Myth-busting time: Adjusting the temperature before you go somewhere isn't worth it, because your home heating or cooling system just has to work harder when you return, right? Busted! If you're going to sleep or leave for at least four hours,
you can save energy when you adjust the temperature on your thermostat by 5 to 15 degrees Fahrenheit. Savings may vary, but you could potentially
save up to 15 percent annually on home heating and cooling bills by adjusting the temperature by 10 to 15 degrees for 8 hours.
A
programmable thermostat can even do this for you automatically. Saving money in your sleep? How very Suze Orman of you.