Peter Duniho wrote:

At what point is it that you believe moisture is actually *removed* from the
cabin air in an airliner?

If you're near the ground, in the A/C units. Higher up, it's removed in the
atmosphere. Cold air won't hold much moisture, and it precipitates out. The
heater doesn't add any.

George Patterson
Why do men's hearts beat faster, knees get weak, throats become dry,
and they think irrationally when a woman wears leather clothing?
Because she smells like a new truck.