The air source of the air-conditioning system can be divided into two categories, one is the hot air flow drawn from the aircraft system, which enters the cabin under the action of the air-conditioning components.

As a closed indoor space, the cabin body also has its own "air conditioner", but in the industry this system is called "environmental control system", or environmental control system for short.

The installation of various air duct components and operating mechanisms should be able to ensure their normal use functions and be easy to operate.