You can control the temperature of your home, room by room using evohome. Smart zoning keeps you in control, saves energy, and allows you to create your ideal comfort zone by only heating the areas you use. The weather may be unpredictable as the seasons change, so we understand that turning off the heat isn't always the greatest option. Honeywell's Warm Weather Saver function uses outside weather data to turn on the heating only if the temperature falls below the desired setting you select. So it won't turn on your heating on those early spring days when the sun is shining, but you won't be taken off guard when the cold front arrives. As a response, evohome saves energy while keeping you comfortable throughout the year.