pauldw
Contributor
Apparently you have not been in my bathroom.The air you breath will always be 21% oxygen
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Apparently you have not been in my bathroom.The air you breath will always be 21% oxygen
No it isn't. Cabin air is constantly recycled with 25-50% of the cabin volume's worth of outside air being added each minute. Excess air is vented off through an overpressure valve.The air you breath will always be 21% oxygen