The A320 aircraft air conditioning system​ mainly consists of four major parts: regional temperature control, electronic equipment ventilation, pressurization system, cargo compartment ventilation/heating (optional). The cooling air is provided by two refrigeration components. The components are based on the principle of turbocharged refrigeration, and their performance directly affects the comfort of the cabin and cockpit.

The bleed air from the low-pressure compressor of the engine is decompressed by the pressure regulator and cooled by the pre-cooling air valve, and then enters the air supply main pipe at 35psi (2.4 atmospheres) and 220 degrees Celsius, and flows through the engine hanger, the leading edge of the large wing, and the front wall of the wheel well. After the board enters two air conditioning components located in the belly of the aircraft.