Refrigerator

A refrigerator, commonly shortened to fridge, is a commercial and home appliance consisting of a thermally insulated compartment and a heat pump that transfers heat from its inside to its external environment so that its inside is cooled to a temperature below the ambient temperature of the room. Refrigeration is an essential food storage technique around the world. The low temperature reduces the reproduction rate of bacteria, so the refrigerator lowers the rate of spoilage.

A refrigerator maintains a temperature a few degrees above the freezing point of water.
The optimal temperature range for perishable food storage is 3 to 5 °C.
A freezer is a specialized refrigerator, or portion of a refrigerator, that maintains its contents' temperature below the freezing point of water.

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