The unit Gatorac mentions from Southern Rods is very compact. I have added a custom plate to the bottom of the unit that has a nozzle each side for passenger and driver heat it also connects to defrosters (with correct blades of course). It has a two speed fan and a shutoff under the dash. I think that's a great way to extend the driving season and my wife just needs to hear a fan running to think she's getting warm. It doesn't even matter if it's blowing cold air on her!
