New thermal management system used in BMW 3 Series' climate control

For a long time, motorists regarded air conditioning merely as a guarantee of a cool workplace when behind the wheel. During the early 1980s, the optional extra was predominantly ordered as protection against the midsummer heat inside the car, true to the motto: the heat has to stay out, irrespective of how hot the sun is. The greater the “refrigerator feeling” experienced by occupants was, the more effective an air conditioning system was considered to be.