Google Nest Built In WiFi Heating and Cooling Dial Smart Thermostat

It learns what temperatures you like, turns itself down when you’re away * and connects to your phone. It has a big, sharp display. And it’s proven * to help save energy. In independent studies, the Nest Thermostat saved * an average of 10% to 12% on heating bills and 15% on cooling bills. * We’ve estimated average savings of $131 to $145 a year.