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Essentially, root cellarsEssentially, root cellars were the first refrigerators. They have the ability to keep their contents 40 degrees cooler than outside temperatures during the heat of summer. This also works in reverse in winter, when root cellar temperatures are kept slightly above freezing. Our page here on serves as a guideline. There are many cooperative extension sites that offer detailed information on how to build a root cellar and keep it at an optimum temperature.

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