I thought this was going to be a pretty cheesy article but it turns out the guy was able to rig a 30F difference between inside and outside temperatures. In a winter time emergency that could spell the difference between living and not. This was not thinking out of the box but in it! Oh, I really like this guy's motto too. "Do not live paranoid, just live prepared."
http://www.practicalsurvivor.com/urb...tercoldweather



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