Rich--and others..there is no end to what you could do to a home made set up like this.the big box heaters are a few hundred bucks for a good one and if you don't really expect to be someplace where survival in your ditched car is a real issue i would assume any camp stove,with proper venting--so on-- would work.in this test i did not cut off the back seat area with a blanket and that would have kept the drivers seat warmer faster.what i did notice was that the car had cold spots,the floor was cold and stayed that way while i was out.



this camping fan/light was a secret Santa gift at work many years ago and i never had a use for it but to move the warm air around in the car it would work fine.