The technolon® DDC110-L room module is a display and operating device for single room control. Communication occurs via the LonTalk® protocol. The technolon® DDC110-L comes equipped with a temperature sensor, an LCD display and operator push buttons for the room functions. By using the push buttons, it is possible to alter the room setpoint and to switch a ventilator between three levels. The display shows the following parameters: current actual and setpoint temperatures, current ventilation level, presence status. If required, the following messages can also be displayed: ventilator faults, window open, dewpoint alarm in the chilled ceilings.