Smart thermostats connect your boiler to your Wi-Fi and in doing so enables you to control your homes heating using a smart phone app inside your home or from anywhere you have a WiFi connection. For example, you could turn your heating on from your car or the bus or even your place of work. Some systems will even connect to voice activation systems.
Almost all systems have a wireless hub connecting to your boiler and a wireless thermostat controller, and some have individual smart radiator valves for controlling the temperature in different rooms of your home as you may not require bedrooms to be heated as high or for as long as a living room.
Smart thermostats in some instances can learn your preferred settings and even detect when your heading home or have left and adjust the temperature accordingly.
Once installed most find the system easier to use than the older wall mounted push button design.