Quote Originally Posted by 12vdc View Post
Won't remove heat if placed in just one side of the window. Remember gas just like fluids move by displacement, won't move air if the car is sealed. ...
All cars have vents, typically located behind the rear bumper to equalize cabin air pressure with the outside. This is where the air will be coming from. But I know what you mean. That fan is just too weak to be of practical use for this application. You need to have a blower that can move air in the order of hundreds of CFMs to get any real effect.