Well, the electric radiator fan would speed up, however when the interior is ultra-hot I still want to start it on a lower moderate blower speed for awhile then kick it up where I want it to be. Maybe I'm being overly cautious...but tend to believe it performs better that way.
Use max air setting to cool the car down. max air recircs just the air in the car. Normal setting brings in outside air.
Wow; an on target comment; most auto drivers never think about those factors.
Used to be called "recirculate", ie a closed loop.
It's also a matter of static pressure. Most vehicles have relatively small, restrictive pressure relief vents (some don't have them at all). When on normal A/C, the outside air is blowing into the pressurized cabin. On recirc, the static pressure across the blower is much lower. Most of the time, the fan speed is no different in recirc, but the flow IS much higher due to static.
