 And it takes 10% from inside the car and recirculates it and keeps you having fresh air in the car. So it takes outside air, cools it, heats it, brings it in the car. Now, when you put it on recirculation mode, it takes and closes off the outside door and only brings in 10% outside air and 90% inside air. So now you're taking the air you already cooled once and you recool it again and you recool it again and you recool it again.