Airline Air Filtration
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.
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Originally Posted by aeroengineer
(Post 3006097)
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.
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Originally Posted by aeroengineer
(Post 3006097)
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.
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 |
Originally Posted by Av8tr1
(Post 3006836)
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 |
Originally Posted by GoFast8
(Post 3006538)
Im no mechanic but Im pretty confident that the air filtration in a typical airliner is basically nonexistent.
For a PAX, air comes into the cabin from above and is exhausted below you at foot-level. That air is then recirculated through a HEPA filter, mixed with bleed air via the backs, and sent back to you. Repeat. Some cabin air is exhausted overboard via outflows or small leaks around door seals, etc. That's why there's continuous inflow from the packs. So the air you're getting is either bleed air (outside air further sanitized by engine compressor temps) or cabin air recirced through a HEPA filter. Your seat-mate could still cough in your face, but you won't be getting anything from the HVAC. The pack outlet might or might not have a different filter to adsorb any fumes from the engine/APU. |
Originally Posted by aeroengineer
(Post 3006097)
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.
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A paradigm shift would include some attention to detail at overhaul and changing the filter more than once annually. These are the same type of management that decided it would be a good idea to grease an MD80 jack screw once annually, we all know how that turned out.. Anyway, I always wore a respirator, it was just like changing a full vacuum cleaner bag that was torn open.
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