Electromechanical flush-mounted room temperature controller for controlling or monitoring temperatures in living rooms, offices and hotels. Suitable for all common switch ranges. Polar white matt, 55x55 cover with button. Suitable for water-based and electric heating systems. The thermal feedback achieves a very small switching difference. Adjustable range restriction in the setting button as a heating cost brake. A captive screw with threaded insert for fastening the housing cover and practical plug-in terminals make installation easier. Installation in a 55 mm flush-mounted box.