Quote:
Originally Posted by pete c
it might also be practical to circulate air directly from the outside to the fridge inside when outside temps were cold enough
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If the circulating air cooled your fridge then the temperature of that air would rise. So you would be bringing cold outside air into your home (where your fridge is), heating it, then sending it outside. That cannot be a sensible thing to do - unless you particularly want to heat up the great outdoors.