That is not "rear air" it's a rear defroster.........and a poor one at that. So far as I know, none of them actually added any heat, they were simply a blower
I know, and I’m not sure why but I do think it’s a kind cool thing to have on an old car. And seeing how I have a couple different blowers and a factory switch and harness I do not posses the will power to not at least try and make it work haha.
