Here is the fastest and most economical way to cool your car in the summer:
1) You get in the car and ride for a mile with the windows down. The car will still be hot, but much less now.
2) If the outside temperature is comfortable for you (say, 80F or less), vent new air in with your AC.
3) If the outside temperature is high (say, more than 80F), recirculate.
You should only use the vent if the outside temperature is more comfortable than the temperature inside the car.

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