people feel that this type of machine produces a lower-quality ice cream because of its slow-motion method. Also available are cordless, battery-operated ice-cream makers that may be placed directly in the freezer, although as Ice Cream Makers with Compressor Ice cream makers with compressors are electric models that use an outside refrigeration system to cool down the freezing bowl and churning paddle. They generally produce larger batches of ice cream than non-compressors due to their higher volume capacity freezers, ranging from 1 quart (1 liter) up to 3 quarts (3 liters). The compressor ice cream makers are also known for their ability to churn quickly without freezing the ingredients first. All you have to do is add in your ingredients, set up, and let the unit work its magic. It is the fast freezing method that has made this type of ice cream maker very popular. This means that you can save on time and energy costs. The compressor ice cream makers are fully automated in their processes with no need for you to do anything at all. Once you have added your ingredients, set up the settings, and turned on the unit, it will churn quickly. The ice cream maker comes with a manual hand crank and double insulation to reduce noise as well as condensation. Built-in freezer machines More expensive, and usually larger, machines have a freezing mechanism built in and do not require a bowl to be pre-chilled. A few minutes after starting the cooling system, the mixture can be poured in and the paddle started. As with coolant-bowl machines, ice cream is ready in twenty to thirty minutes depending on the quantity and recipe. These machines can be used immediately with no preparation, and they make any number of batches of ice cream without a delay between batches. Some of these machines cannot be moved without waiting twelve hours before use since moving the unit upsets coolant in the freezing system. These machines are normally kept permanently in one position ready for use making them impractical in smaller kitchens. Ice-salt coolant machines The fourth type of electric ice cream maker uses an outer tub filled with ice and salt for chilling using freezing point depression. An inner canister holds the ice cream mixture and churn and scraper assembly. A high-speed electric motor, geared at approximately 75rpm, drives a mechanism that simultaneously rotates the canister, counter-rotates the