Fin Fan Cooler is nothing but traditional name of Air Cooled Heat Exchanger. Since Fins are used in the Cooler it is called as Fin fan Cooler. Please refer Air cooled Heat Exchanger for all the details. In the Fin fan coolers, the ambient air is used as the cooling media to cool the main hot fluid which is used in tube side. All the tubes used in the coolers are finned tubes only. The finned tubes are having more contact surface , hence the fin fan cooler is one of the best closed circuit and water savable cooling system.