OK, I know this sounds like a dumb question but I got curious and started looking for AC ducts leading to the seats in my new truck without success. No dust or tubes leading to the seats. Are they using a Peltier thermoelectric element to do the job? I can't think of any other way. I searched on the net and it seems to be a common question without a definitive answer. My wife has them in her Lincoln and there are no ducts either. I had a powerful Peltier cooler many years ago that worked amazingly well but it was a power hog.