A/C recirculation
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Keep in mind that the general recommendation on using recirculation on any vehicle it to use it for drying out the air in very humid conditions. If you leave it on recirc all the time you are not getting fresh air from the outside. You don't want to keep re-breathing the same old stale air do you?
Also, typically passengers in the back seats (particularly on vehicles that lack dedicated rear a/c vents such as the flow-through console) will get less cooled airflow back there since the recirc tends to pull air back under the front dash as opposed to letting it flow from front to back (where it exits to the outside of the cab).
Also, typically passengers in the back seats (particularly on vehicles that lack dedicated rear a/c vents such as the flow-through console) will get less cooled airflow back there since the recirc tends to pull air back under the front dash as opposed to letting it flow from front to back (where it exits to the outside of the cab).