Graphic: Haisam Hussein
Here's how cabin air is circulated, filtered, and refreshed throughout most of today's aircraft:
- Fresh air continuously enters both engines at -65 degrees. Temperature and pressure are increased, then air is passed through a control valve and cooled by additional outside air.
- HEPA filters remove 99.7 percent of particles; new technology could destroy 100 percent of all bacteria and viruses.
- Filtered, recirculated cabin air and fresh air are combined.
- The aircraft is divided into ventilation segments of three to seven rows; you share air only with passengers in your segment.
- Outflow valve continuously releases cabin air and helps maintain constant pressurization of aircraft.
More good news: Airplanes are healthier than you think.
Alex Pasquariello is a senior assistant editor at Condé Nast Traveler covering news, politics, and environmental issues. He is fond of almost any pursuit that requires a helmet and his favorite ecosystem is high alpine tundra in late June.
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