What is the responsibility of the cabin environmental control system?

The responsibility of the cabin environmental control system is to regulate cabin pressure, temperature, and air quality. This system is essential for ensuring passenger comfort and safety during flight, as it helps maintain an environment that is conducive to healthy and comfortable conditions despite the high altitudes at which airplanes operate.

Specifically, regulating cabin pressure is crucial because as an aircraft ascends, the atmospheric pressure outside decreases, which can affect passengers' breathing and overall well-being. The system also controls the temperature to keep the cabin comfortable and adjusts the airflow to ensure fresh air circulation, which is vital for good air quality. These functionalities work together to create a secure and pleasant atmosphere for all on board, making it vital to flight operations and passenger experience.