Free shipping with RedCard or on orders over $35. Smart upgrade - Amazon Smart Thermostat is an easy way to switch from a traditional thermostat and help reduce energy usage. Save money - After purchase, Amazon will send you an email with details about rebates that may be available from energy providers in your area. Explore rebates above. Save energy - ENERGY STAR® certified thermostats are required to save an average of $50 on yearly energy bills. Automatic control - Alexa can do the programming for you, updating the temperature to keep you comfortable.