“...ran a ventilation fan in hot weather to keep the inside of the car cooler.”
Going back to the past B4 AC...hand crank all the windows down and go 60 mph...and the hand choke inside...you know...the thing.
Yep, “4-60 Air Conditioning” (and the Desert Water Bag in front of the radiator). I forgot to mention that the Toyota Prius solar vent system was for when the car was parked.