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
~10–30 kW typical; to ~50 kW on current productpassive RDHx capacity per rack (server fans only, zero added fan power)
up to 75 kW — Motivair ChilledDooractive RDHx capacity per rack — Motivair ChilledDoor rated to ~75 kW at 100% heat capture; verify entering-air and entering-water temperatures, airflow and pressure drop
10–100 kWRDHx capacity per rack (passive ~10–30 kW typical, to ~50 kW on current product; active ~50–100 kW); ~$8–15k/rack