ABB Caldion® Room Temperature Controller for fan coil units with 2 pipe, 2 pipe with electric heater or 4 pipe system, Flush Mounted, BS standard, Available for standalone function or as KNX device with integrated bus coupling unit, Build in temperature sensor, 2 x binary input for window, dewpoint, condensate alarm, integrated actuator output control for on/off or 0-10V valve and 3 x fan speed control. Dedicated capacitive touch RTC control button for intuitive control, mode operation and frameless design with large display.