The Nest Learning Thermostat is the principal indoor regulator to get ENERGY STAR confirmed. It realizes what temperature you like and constructs a calendar around yours. Since 2011, the Nest Thermostat has spared billions of kWh of vitality in a huge number of homes worldwide.* And free investigations demonstrated that it spared individuals a normal of 10% to 12% on warming bills and 15% on cooling bills. So in less than two years, it can pay for itself.