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1 Install a programmable thermostat to automatically adjust your home's temperature settings when you're away or sleeping.  When used properly, a programmable thermostat with its four temperature settings can save about $180 a year in energy costs.
Tools. 1  Save Energy @ Home Tool Take a room-by-room tour of ENERGY STAR @ home and learn what you can do this spring to save energy, save money and help protect our environment in your own home. 2  Using Your Programmable Thermostat This video teaches you to properly use your programmable thermostat.