Electromechanical flush-mounted room temperature controller for controlling or monitoring temperatures in living rooms, offices and hotels. Suitable for all common switch ranges. Aluminum, 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 adjustment knob 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.