Conditioned means treated air: air that has been heated or cooled, adjustable to the desired temperature. The air is treated in an air treatment unit. A distributor section is placed on this unit. It diverts the air to the various decks. The air is moved through insulated Spiro ducts.
On the decks, the air is blown into the appropriate room by a cabin unit which is located in the ceiling. The outlet ornament of the cabin unit has a control valve, allowing individual adjustment of the air supply and temperature for each accommodation cabin. The exhaust air is sucked out through an uninsulated pipe system by means of overpressure (through door gaps and/or grates).