You regulate the temperature per radiator with smart thermostat knobs. That way, you can set a different temperature for every room. As a result, you heat more energy-efficiently because you don't heat unnecessarily. Via the app on your smartphone, you can set routines that turn the heating on or off. For example, set the radiators in the living to turn on right before you get home from work. Note: a smart thermostat knob only fits on radiators with thermostat knobs, which you recognize by the numbers 1 to 5.