Specifically designed for use in servers, the Alphacool Dual-Flow radiators have been developed. The ability to run two separate circuits through a single 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, travels through half of the radiator, turns around, and then flows back 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 a Dual-Flow radiator, the water flows from one side to the other just like in an X-Flow. However, the Dual-Flow radiator is split in the middle. One could also say that the Dual-Flow radiator is essentially 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.