What is The Definition Of A Packaged Air Cooled Chiller? A Packaged Air Cooled Chiller is a type of mechanical cooling system used to maintain a desired temperature in a given area or space. This system works by drawing in ambient air, cooling it and then returning it to the space or area. This type of chiller is typically used in large buildings, such as commercial office buildings or hospitals, to keep the interior temperatures comfortable. The system consists of an evaporator and a condenser, which are connected by a refrigerant line. The evaporator is responsible for cooling the air by absorbing the heat from it and transferring it to the condenser. The condenser then dissipates the heat from the air by radiating it to the outside environment. This system is very efficient and can provide temperature control for large areas with minimal energy consumption. The maintenance of Packaged Air Cooled Chillers is also relatively simple and cost effective, as they require minimal repairs and regular maintenance