The amount of water consumed per load for a commercial dishwasher varies depending on size, and whether or not they are high efficiency. Typically, a commercial dishwasher will use 0.78 gallons per rack (three liters a rack) but ENERGY STAR certified machines will use less. An ENERGY STAR certified commercial dishwasher uses 40 per cent less energy and 40 per cent less water, on average than a standard model. It’s important to note that commercial dishwashers use the same amount of water and energy regardless of how full they are, so washing full racks of dishes will make the dishwasher more efficient with the water it is already using. You can find the amount of water used per load for ENERGY STAR certified commercial dishwashers here.