How do airlines handle cabin air quality and circulation?

Airlines are responsible for maintaining the air quality and circulation inside the cabin to ensure a safe and comfortable flying experience for passengers. They use various methods and technologies to achieve this goal.

One of the most important ways airlines maintain air quality is by using high-efficiency particulate air (HEPA) filters in their aircraft. These filters are capable of removing up to 99.97% of airborne particles, including bacteria and viruses, from the cabin air. The air inside the cabin is also exchanged with fresh air from outside the aircraft every few minutes.

Another important aspect of maintaining air quality is controlling humidity levels. Most airlines keep the humidity level in the cabin between 10% and 20% to prevent the growth of bacteria and fungi.

To improve circulation and prevent the spread of airborne particles, airlines also use a combination of air supply diffusers and exhaust outlets strategically placed throughout the cabin. These systems ensure that the air is constantly circulating and flowing from the ceiling to the floor, which prevents stagnant pockets of air from forming.

Additionally, airlines may use ultraviolet (UV) lights to sanitize the cabin air and surfaces. UV lights can destroy viruses, bacteria, and other pathogens, reducing the risk of infection for passengers.