Positives: Heizkörperregler can be installed well, Display easy to read. However, what bothers me most is that permanent establishment and supply drive of the control valve. For people who are not present in radiator nearby, that may well be OK. Furthermore, the target differs from the room temperature (non-linear). Room temperature varies depending on boiler temperature. The greater the deviation, the more swings the controller. The use of a master and slave control, would the control performance is many times improve. Conclusion: For those who do not need a technical frills Mechanical thermostat head-control valves are by far the better choice.
