The Product The Nest E Pro from Google is an affordable smart thermostat that learns your heating and cooling preferences to optimize your comfort needs. This adds up to substantial savings on your monthly energy bill. Control it from any location with the Nest app on your smartphone, tablet or PC. Energy Savings Nest is the first thermostat to be ENERGY STAR certified by the EPA. Customers saved an average of 10% to 12% on heating bills and 15% on cooling bills, according to several years of study. Check your energy history within the Nest app to see how much you're saving and ways to save more. The Nest Leaf appears on the display when the temperature is set at an energy-saving level. Smart Features The Nest thermostat controls temperature automatically by learning your habits, then programming itself to suit your lifestyle. Use it like you would a regular thermostat for a week by adjusting the temperature as normal. After several days, Nest will program itself to keep your home comfortable based on your schedule. It automatically turns down when you're away from the house by using your phone's location. Additionally, you can lock your thermostat to prevent adjustment unless the user can enter a short, chosen code. Updated Design The Nest E Pro features a subtler design and a lightweight polycarbonate build. The frosted display blends in with light colored walls and wall coverings. It is easily controlled with a spin dial that wraps around the device.