Smart Thermostats Why Buy a Smart Thermostat? With a smart thermostat, you can save money, energy, and time by automatically adjusting your heating and cooling needs during any season. Smart thermostats allow you to monitor and adjust your home’s temperature even when you are away. ENERGY STAR® certified smart thermostats can be controlled remotely via a smartphone, tablet, or laptop – allowing you to turn down your heating and cooling from anywhere. Some models can even detect when your home is empty and automatically lower your home’s temperature to save you energy and money.