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Thread: About humidity level on planes
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Old Aug 16, 2013 | 2:08 am
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CPRich
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What aircraft? Because air is extremely cold and dry at cruising altitudes, cabin humidity is typically lower than that - 12% or so. Aircraft systems do not "remove" moisture - there's simply none there. The 787 has systems to try to get humidity into the upper teens to provide more relief.

http://www.askthepilot.com/questiona...n-air-quality/
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