Kelvinator was an American home appliance manufacturer and a line of domestic refrigerators that was the namesake of the company. Although as a company it is now defunct, the name still exists as a brand name owned by Electrolux AB. It takes its name from William Thomson, 1st Baron Kelvin, who developed the concept of absolute zero and for whom the Kelvin temperature scale is named. The name was thought appropriate for a company that manufactured ice-boxes and refrigerators.

A refrigerator, colloquially 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 room temperature. Refrigeration is an essential food storage technique around the world. The low temperature lowers the reproduction rate of bacteria, so the refrigerator reduces 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 similar device that maintains a temperature below the freezing point of water is called a freezer. The refrigerator replaced the icebox, which had been a common household appliance for almost a century and a half. The United States Food and Drug Administration recommends that the refrigerator be kept at or below 4 °C (40 °F) and that the freezer be regulated at −18 °C (0 °F).