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@nanomonkey
Re: %Pg7+lVNJS

Peanut oil has a melting point of 3 degC and is fortunately cheap to buy in bulk.

Your other option is to actually use the freezer as a freezer, and use propylene glycol pumped from the freezer into your old fridge to maintain the desired 4 degC fridge temperatures. In this case you would want to freeze a large mass in the freezer during the day and use it as a cold battery for your fridge.

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