Includes integrated KNX bus coupler and custom labeling field. Programmable left/right rocker switch (switching/dimming/blind/value sender/light scenes/fan function, etc.). Primary/secondary configuration. With base-load operation. Control element with room thermostat function for triggering heating, ventilation, and fan-coil actuators. This device is a constant room temperature controller for ventilator convectors (fan coils) in 2-pipe and 4-pipe systems and conventional heating or cooling systems. The fan stage can be switched manually or in automatic mode. Class of temperature controller 1. Contribution to space heating energy efficiency 1.0%.