Well I think for most vehicles the recir button is to only move the air in the cabin, it does not bring air in from out side, this is used to allow the compresor to work less when the ac is on becuase it is cooling cold air. Also used when the air out side might have polution or bad smell, like stuck inside a tunnel in bumper to bumper trafic with a large buss pureing its fumes in your face. ( I think this is the idea)
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lux/offroad/sunroof/grey/nobling>drive it like you stole it
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