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Open freezers in a grocery store work by having adequate air flow. This flow helps to keep the cold air from escaping, or allowing the warm air in. Cold air is heavier than hot air, so the colder air naturally stays low where it can keep the food cold.

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10y ago

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A lidless freezer keeps its stock cool by recirculating the cool air.

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12y ago
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Q: How do the open freezers in grocery stores work?
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