Place the Netatmo NAV-EN smart radiator valve on your radiator and set the temperature per individual room. Download the app (iOS and Android) and create a heat diagram based on your daily activities at home. For example, imagine that the bathroom is preheated in the morning and the temperature in the bedroom goes up in the afternoon. In the app you have a temperature overview per room. With more Netatmo radiator valves in your home you save up to 37% on your energy costs. Set the night mode and the radiator in the bedroom automatically lowers the temperature at night. So you sleep with a pleasant temperature. The radiator valve also has an open window detector. When the window is open, the tap automatically switches off the radiator. No unnecessary heating costs.Note: to use the Netatmo NAV-EN (Expansion) you need the Netatmo NVP-EN starter package.