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Old 08-31-17, 11:33 AM   #2
elhigh
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Most chest freezers in the US have their coils buried in the sides of the box itself - not a bank of coils with a fan forcing air over them, but the entire outside surface of the freezer radiating heat naturally.

This is a terrible design of course, since it also puts those warm coils right against the very insulation that is supposed to keep heat out of the cold compartment. Dumb.

If your freezer's coils are in a separate compartment, then I would say add all the insulation you can stand and/or afford. This includes adding insulation underneath, so long as air flow to the coils is unimpeded.
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