Rear-door heat exchanger · RDHx
A radiator-style door on the back of a rack that cools exhaust air with liquid before it enters the room.
Current numbers
~10–30 kW typical; to ~50 kW on current productpassive RDHx capacity per rack (server fans only, zero added fan power)
~50–100 kWactive RDHx capacity per rack — newest high-capacity doors reach ~100 kW; Motivair ChilledDoor rated to ~75 kW at 100% heat capture
10–100 kWRDHx capacity per rack (passive ~15–30 kW; active ~50–100 kW); ~$8–15k/rack