Chillers are a type of mechanical cooling system used to cool large areas or industrial processes. They are often used in commercial and industrial settings, such as factories, warehouses, and office buildings. A chiller works by circulating a refrigerant, such as water or a refrigerant gas, through a closed loop system. The refrigerant absorbs heat from the air or liquid in the area being cooled, and then transfers the heat to a condenser, where it is released into the atmosphere. Chillers are typically used in combination with other cooling systems, such as fans and air conditioners, to provide a more efficient cooling solution. Chillers are an efficient and cost-effective way to cool large areas or industrial processes, and can be used in a variety of applications.