RDHx（Rear door heat exchanger) is one of the important functional components for achieving full liquid coolingdesign of cold plate liquid cooling system. The function of RDHx is to import the heatfrom the server's air cooling part into the liquid cooling system, to increase the liquidcooling ratio of the server. it reduces the energy consumption of the thermal controlsystem.

The active RDHx comprises a passive RDHx and a wind wall. For systems utilizing apassive RDHx that may require an upgrade to an active RDHx in the future, a purchaseof the wind wall component is all that's needed.

One single active RDHx achieves 20kW@AT = 3°℃ (heat exchange temperature differ-ence between liquid inlet and air outlet), cooling the hot air inside the cabinet andsatisfying the growing cooling needs of servers.