Originally Posted by
jimmc66
Air vents are an anachronism from the early days of flight. They do little to improve circulation on the planes, even during temperature fluctuations.
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Have you been on a small regional jet? You can really feel the difference when you're waiting for the plane to board!
FAs on a recent B77W flight made multiple announcements about people complaining that the cabin was cold and told everyone to close their vents if the were cold.
One FA even offered to close mine, but I declined as I prefer to prefer to be slightly cold.