Special technical features - Automatic, continuous room temperature control with temperature preselection - Efficient power stage to shorten the "heating up time" - Electronic speed control with soft adaptation, thus low in noise and power-saving - Integrated control unit with TRS/ADR function (diesel) - Fully electronic control by microprocessor - Permanent function monitoring - Ventilator function for summer operation possible (AIRTRONIC) - Error diagnostics - Low maintenance and easy to service