On average, a frost-free refrigerator uses over 5 amps, while a standard model usually requires under 3 amps to operate. The number of amps a refrigerator requires depends on the manufacturer, size and type of unit.
Refrigerator sizes range from 1.7-cubic-foot dorm fridges to 31-cubic-foot commercial models in restaurants and places of business. Ice makers, water dispensers and filters and other features also increase electricity usage.
Contemporary refrigerator models are more energy-efficient than those previously produced. Manufacturers use better insulation, which allows refrigerator walls to be thinner. This allows designers to increase storage space while decreasing heat gain from the atmosphere.