11 COOLING AND HEATING APPARATUS FOR VEHICLES, NAMELY - HEATERS, FILTERS FOR AIR CONDITIONERS, AIR CONDITIONERS, AIR REHEATERS, AIR DRYERS AND WINDOW DEFROSTERS; REFRIGERATORS; VENTILATORS; RADIATORS AND FANS FOR MARINE, AIR AND LAND VEHICLES, BLOWING UNIT COMPRISED OF A HYDRAULIC, FRICTION, MAGNETIC, ELECTROMAGNETIC OR SIMILAR COUPLING UNIT, SOLD AS A COMPONENT PART OF A FAN