When traveling by plane, whether it is boarding or flying at an altitude of 10,000 meters, the appropriate temperature and fresh air in the cabin are the basis for a pleasant travel. And these are the important tasks of the air management system.

Typical air conditioning systems provide bleed air from two engines or the APU (a separate gas turbine engine that provides power and air when the engines are not running). The bleed air from the engine is drawn from the medium-pressure or high-pressure compressor. Because of the compressor, it is very hot. Before entering the air-conditioning system, it must be pre-cooled by a precooler, and then sent to the air-conditioning system.