Air-cooled chillers are cooling systems that use air to remove heat from a building or process. They work by circulating refrigerant through a series of coils, where it absorbs heat and then releases it to the outside air. This process helps maintain a comfortable indoor temperature and is commonly used in commercial and industrial settings. These chillers are typically installed on rooftops or outside buildings, making them easy to maintain and operate. Unlike water-cooled chillers, they do not require a cooling tower or water supply, which can reduce installation costs and simplify the overall system design.