Air displacement units are suitable for both industrial and comfort air conditioning applications. They are suitable for rooms characterized by high heat loads or heavy air pollution. Air displacement units supply air at large flow rates (up to 10.000mc/h) at low air velocities (in the range form 0.1 to 0.3 m/s). The air so supplied forms a so called “fresh air pool” in the occupied zone. Air is lifted in convection currents from heat sources to the ceiling layer, from which it is extracted from the room. In this way, even temperature field is maintained in the room , free of draught.