3 ms·
50% is recirculated, 50% is from the outside. Before the 80's it was 100% from the outside, though.
by helloplanets 5mo ago
50% is recirculated, 50% is from the outside. Before the 80's it was 100% from the outside, though.
- ses1984 5mo agoThat statistic doesn’t mean much. The question is how long does it take for all the air in the plane to be replaced.