Duster Rear-Defroster/Defogger?

i know this post is old....

but couldnt you put a single dc heating element in that steel box controlled by a variable resistor to instantly heat the air going to the rear defroster...like a soldering iron of sorts except run by dc....or a coiled wire from a heat gun stuffed in a small pipe the size of a bic pen made from ceramic or metal

anyone got any ideas on what element to use.....how hot it needs to get to effectively heat the air...how many amps it needs to draw

or make the flexible hose that runs to the plastic duct out of metal and put the element in there


i would like to know how to make my front heater turn faster so my windshield actually gets enough force to be defrosted......more fins? faster motor?...more electricity to the motor?....and then run smaller hoses to the sides of my darts dash to defrost the side windows.....this really is an issue for me. i dont know how they drove these cars back then...you cant see out of them in cold weather