A Thermostat That Practically Says Hello New software on the latest Nest Learning Thermostat make it so user friendly it “recognizes” you when you walk in the room. With Farsight, 3rd Generation Nest senses movement in the room and lights up to show you the target temperature or time. Another new feature is Furnace Heads-Up, which uses diagnostics to give advance notice about possible problems with your heating system. This exclusive pro-model has a 5-year warranty instead of the 2-year warranty
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