"George Patterson" wrote in message
news:tdmle.264$zb.121@trndny04...
Perhaps some aircraft are equipped with humidifiers for the inside air?

A humidifier would require the carriage of water; beyond that already
required for the galley and lavatories, of course.

I'm not aware of any jet with a humidifier. Certainly, my friend at Boeing
claims that no commonly used commercial airliner has a humidifier.

Pete