Valves Smart Radiator Valves from Netatmo help to reduce your ecological CO2 footprint. How, I hear you ask? By saving up to 37% energy with these handy little helpers. Since the thermostats can be controlled centrally using a mobile phone, users can set an individual desired temperature for each room. Rooms only have to be heated when they’re needed. So there’s absolutely no need whatsoever to heat rooms that aren’t used at night. This allows you to save energy – and in your sleep to boot.