Quote:
Originally Posted by Target70
air doesn't travel through the noise generator, the generator body is a sealed diaphragm. If it was open then the engine would be sucking in un-metered air.
and I could be crazy, but I don't remember my a/c turning on recirculation unless I press the button. It will turn it off though if you switch the vent zone to defrost/windshield
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They're more than likely talking about the auto-climate control.
Like previously stated, for max AC option the car usually will recirculate the in cabin air as it already has been cooled. Therefore it will be cooling colder than ambiant air making the cooling effect quicker