Specifically designed for use in servers, the Alphacool Dual-Flow radiators have been developed. The ability to run two separate circuits through one radiator is unique. What does Dual-Flow mean? In a classic radiator, the water flows in a U-shape. Water is introduced on one side, flows through half of the radiator, then turns around and returns through the other half. The outlet is on the same side as the inlet. In an X-Flow radiator, the water flows completely from left to right through the radiator. The inlet and outlet are on opposite sides. In the Dual-Flow radiator, the water flows from one side to the other like in the X-Flow. However, the Dual-Flow radiator is divided in the middle. One could also say that the Dual-Flow radiator is simply two small X-Flow radiators in one. What are the advantages? Due to the very limited space in a server rack, the use of multiple radiators is possible.