Netatmo's connected radiator valves are designed to talk to its thermostat, and are controlled through the existing mobile or web apps. They also add a new feature to the smart heating system in the form of open window detection, which turns the heating off if you're basically just wasting hot air. The valves are possibly the best-looking ones around, too, thanks to serial tech designer Philippe Starck, who is also responsible for Netatmo's minimalistic thermostat. The smart radiator valves are expected to launch towards the end of the year for £60 a piece.

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