Programs itself. Then pays for itself. The third gen Nest Learning Thermostat ls more beautiful than aver, with u thinner, sleeker design and bigger, crisper display. And t's proven to help save energy. In independent studies, the Nest Thermostat saved an average heating bills and 16% on cooling bills. We've estimated average savings of $137 to $145 a year. Nu mots confusing programming. balsams the temperatures you like and programs Re elf.