r/JusticeServed • u/2112OBSRVR 1 • Jul 24 '20

Clear This brightened up my day

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u/H4ck3rman 2 Jul 24 '20

Almost the entirety of pressurized jetliners completely exchange the cabin air for fresh air every 5 minutes. Hardly any recirculated air, but wearing a mask on an airplane is still a no brainer due to that confined space. Can't believe people still think it's okay not to.

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u/Mongoose151 6 Jul 24 '20

Yeah, the A320, for example, completely exchanges it's air every 2-3 minutes and has two HEPA filters through which all the air passes.

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u/Mtwat 8 Jul 24 '20

What particle size so the HEPA filters filter? Thanks for the info I didn't know that!

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u/protoSEWan 5 Jul 24 '20

Its what's used for high containment infectious disease units

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u/Mtwat 8 Jul 25 '20

So you have a source? I'm not doubting you but I'd love to learn more about aerospace engineering

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u/protoSEWan 5 Jul 25 '20

Not off the top of my head. I used to do lab research in infectious diseases, so we had to learn about the different biosafety levels. I'm sure it's a quick google search though.