A cooling tower is a structure used to remove heat from water that has been heated by industrial processes or air conditioning systems. It works by allowing water to flow through the tower while air is drawn in, promoting evaporation. This process cools the water, which can then be reused in the system, improving efficiency and reducing energy consumption. Cooling towers come in various designs, including natural draft and mechanical draft types. They are commonly found in power plants, manufacturing facilities, and large commercial buildings. Proper maintenance of cooling towers is essential to prevent issues like legionella bacteria growth and ensure optimal performance.