Humidifiers on Airbus but not in Boeing?
If I am not wrong, I think Airbus has a kind of humidifier system for the cabin, which adds a bit of moisture to the air, making it less dry. And I guess Boeing does not have one.
I used to fly as a cabin crew for both fleet, the B777 and the A340, both ULH flights and it was easy to notice the difference, the B777 was dryer.
Leaving my nose too dry/sensible that few times I started nose-bleeding after the flight.
AirGus.-