The majority of airplanes are equipped with HEPA filters. As in, removing 99,97% of particles over 0.3 micron in size. The unfiltered air is fed in from the outside. It’s pretty clean and not a consideration for allergens like peanut particles.
As in, removing 99,97% of particles over 0.3 micron in size.
HEPA filters remove 99.97% of particles that are 0.3 micron in size. (That is the size of particles they’re tested with, as it’s the most difficult to filter.) They remove over 99.97% of particles larger or smaller than 0.3 microns.
The majority of airplanes are equipped with HEPA filters. As in, removing 99,97% of particles over 0.3 micron in size. The unfiltered air is fed in from the outside. It’s pretty clean and not a consideration for allergens like peanut particles.
Source: https://www.nationalgeographic.com/travel/article/how-clean-is-the-air-on-your-airplane-coronavirus-cvd
HEPA filters remove 99.97% of particles that are 0.3 micron in size. (That is the size of particles they’re tested with, as it’s the most difficult to filter.) They remove over 99.97% of particles larger or smaller than 0.3 microns.