What is the best smart thermostat for energy savings?

The Nest Learning Thermostat is widely considered the best for energy savings because it learns your schedule and adjusts automatically, earning Energy Star certifications and top efficiency ratings. The ecobee Smart Thermostat Premium comes with a built-in room sensor to focus on occupied rooms and offers excellent energy reports. Both models save an average of 10 to 15 percent on heating and cooling costs. Check with your utility for rebates that can reduce the price. Either choice will significantly reduce your energy usage.