Direct draw beer systems usually have a short distance between keg and pour, such as within a walk-in cooler, an under-counter refrigerator, or a kegerator. A glycol beer system is usually designed for long-draw setups, where the draft line travels 25 ft or longer. The flow of glycol in coolant lines keeps the draft beer lines and faucets cold. Forced air systems usually blow chilled air from coolers to keep the draft lines, towers, and faucets at the proper temperature for storing and serving beer.