RDHx · Rear-Door Heat Exchanger
A liquid-cooled rack door removing ~50-100 kW without piping liquid to the chips; a brownfield step toward full DLC.
A radiator-style door on the back of a rack that cools exhaust air with liquid before it enters the room.
Also written as: Rear-Door Heat Exchanger
Current numbers
up to 75 kW — Motivair ChilledDooractive RDHx capacity per rack: Motivair ChilledDoor, rated to ~75 kW at 100% heat capture
~50–100 kW (active)RDHx capacity per rack with active door fans; ~$8–15k/rack
30–40 kW typical RDHx; >50 kW with active fans; not a universal limitSemiAnalysis/nVent RDHx range: 30–40 kW typical and >50 kW with active rear-door fans; verify the named door/rack and facility envelope