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OK....you put a refrigerator in a warm house to cool food, when maybe outside the house it's colder than the refrigerator. The idea....add a secondary cooling system to refers, that would circulate an antifreeze liquid plumbed outside to dissipate heat. When the fridge is cold enough, the cooling pump stops.
macgilver, Oct 31 2009
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It depends where you are.
The way I see it, if you are in a colder place that you could effectively "cool" your refrigerator with outside air (not that I'd want to rely on that), you would also be heating your home. Being the refrigerator normally extracts the heat from the food and releases it into the room, that surplus heat is heat your normal heating plant doesn't have to make, instead of being thrown out.
The cost of installing something like that would not be made up in the little energy savings you would see. Just like installing solar panels on your house, it takes 20 years for them to pay themselves off, at which time they need to be replaced.