How HEPA Filters Clean Cabin Air

During flight, cabin air is constantly renewed. As fresh air enters the cabin from outside, the same quantity of used air from the cabin is expelled overboard.
Credit: AIRBUS
According to IATA, the risk of infection on airplanes is probably lower than in many confined spaces because modern airplanes have cabin air filtration systems equipped with high efficiency particulate air (HEPA) filters. HEPA filters have similar performance to those used to keep the air clean in...

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