Originally Posted by
aeroengineer
So how well is the air filtered on the typical airliner? Getting the flying public confident in flying again means they have to believe that they're not inhaling a bunch of potential pathogens. Of course people packed shoulder to shoulder doesn't help in the prevention of spreading germs either. I suspect there will be a fundamental paradigm shift in this area going forward.
My understanding is there is a pretty hefty HEPA filter for the bleed air coming in. So the vent air should be good?
Cabin air is completely refreshed 20 times per hour, compared with just 12 times per hour in an office building. On most aircraft, air is also circulated through hospital-grade HEPA filters, which remove 99.97 percent of bacteria, as well as the airborne particles that viruses use for transport Additionally, cabins are divided into separate ventilation sections about every seven rows of seats, which means that you share air only with those in your immediate environment and not with the guy who’s coughing up a lung ten rows back.
https://www.tripsavvy.com/air-qualit...r-flight-54164
http://hasmak.com.tr/puro/FAA-PMA%20...eplacement.pdf
https://aerospace.pall.com/en/commer...iltration.html
https://www.faa.gov/data_research/re...dia/201520.pdf