The lower temperature lowers the reproduction rate of bacteria, so the refrigerator reduces the rate of spoilage. Refrigeration is an essential food storage technique around the world. The refrigerator should be kept at or below 40 ☏ (4 ☌) and the freezer should be regulated at 0 ☏ (-18 ☌). A refrigerator (colloquially fridge) is a commercial and home appliance consisting of a thermally insulated compartment and a heat pump (mechanical, electronic or chemical) that transfers heat from its inside to its external environment so that its inside is cooled to a temperature below the room temperature.
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