KEY FEATURES: Nest's smartest, most advanced thermostat, the Google Nest Learning Thermostat (4th Gen) is a beautiful, brilliant way to save energy, keep your home comfortable, and ensure your heating and cooling systems run smoothly. The Nest Learning Thermostat (4th Gen) works with most 24V systems, including gas, electric, oil, forced air, heat pump, and radiant, and eliminates the need for a C-wire installation in most homes; visit the Nest Compatibility Checker for more information More...