Air isn’t recirculated on an airplane. It’s continually brought in from outside the aircraft
50% is recirculated, 50% is from the outside. Before the 80's it was 100% from the outside, though.
That statistic doesn’t mean much.
The question is how long does it take for all the air in the plane to be replaced.
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50% is recirculated, 50% is from the outside. Before the 80's it was 100% from the outside, though.
That statistic doesn’t mean much.
The question is how long does it take for all the air in the plane to be replaced.
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