Airbus, in its wisdom has deleted these items from many of its craft,
From an outsiders point of view (or should that be insiders point of view, if I am inside the cabin?
)The only reason that a manufacturer leaves features and equipment out is to save money.
They have probably stated that they can save weight and cost and that their air handling system is 100% flawless and the carriers have agreed with them. Cynical? Me??
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"I tell you, we are here on Earth to fart around, and don't let anybody tell you any different." Kurt Vonnegut, Jr.