Smart thermostat with new heating algorithm and multi-room control offering greater comfort, savings and control, plus platform connectivity. Features an improved interface on the thermostat itself and new Smart Schedules in the app to make heating control even easier. Phone location is used to control heating, ensuring no energy is wasted and the smartphone app permits full control over heating wherever. For homes with an existing wired thermostat on a combi boiler (i.e no hot water tank).