Industrial refrigerators are designed to maintain stored items below room temperature, but above the freezing point of water. Industrial freezers are designed to keep their contents below the freezing point of water (32? F). Industrial refrigerators and industrial freezers include display cases, reach-in cabinets, meat cases, frozen food cabinets, beverage coolers, food service carts, ice cream cabinets, and soda fountain units.
A refrigerator freezer has a separate compartment for refrigeration (above the freezing point of water) and the freezer (below the freezing point of water).
A compact refrigerator freezer is the smallest size, with a capacity of about 5 cubic feet. Walk in freezers have full-sized doors that allow a person to walk into the freezer.
A deep freezer is designed for the quick-freezing and long-term storage of food.
A propane refrigerator uses propane gas to supply the energy needed for cooling.
A portable freezer uses a 12 VDC power supply and can operate at non-upright angles, as in airplanes, cars, trucks, boats and recreational vehicles. A chest freezer can keep items colder for a longer period of time than a similar-sized upright freezer.