A condenser is used in a cooling system. A condenser removes heat from cooling medium that flows through it. The cooling medium can be one of several coolants. A condenser is used in a cooling system. A condenser removes heat from cooling medium that flows through it. The cooling medium can be one of several coolants. Heat from the evaporator and compressor of the cooling system is transferred to the coolant before it reaches the condenser. When the coolant flows through the condenser it is cooled and condenses, i.e. it changes phases from gas to liquid form. Heat is typically removed from the condenser using either air or water. Thus, condensers are generally either air-cooled or liquid-cooled. An air-cooled condenser is supplied with cooling air by a fan, whereas a water-cooled condenser is supplied with cooling water by a pump. There are many different designs of condensers. An air-cooled condenser is typically equipped with copper or steel pipe, onto which aluminium fins are fitted. The cooling medium flows through the pipes, transferring the heat to the fins, which in turn are cooled by passing air. A water-cooled condenser often has an elongated tank with a built-in pipe system. The cooling medium flows around the pipes in the tank, while cold water flows inside the pipes, extracting the heat from the cooling medium.