{"data":{"slug":"rear-door-hx","etype":"tech","name":"Rear-Door Heat Exchangers","cat":"Cooling","subtitle":"Liquid-cooled doors that upgrade air racks without touching servers.","summary":"A rear-door heat exchanger replaces a rack's back door with a water coil, capturing 30–80 kW of exhaust heat at the rack. It is the retrofit bridge for H100/H200-class gear in halls that cannot yet plumb cold plates.","attrs":null,"kf":null,"aliases":["RDHx","rear door"],"ticker":null,"exchange":null,"hq":null,"founded":null,"website":null,"status":null,"region":null,"asof":"2026-01-15","sources":[{"url":"https://www.opencompute.org/projects/cooling-environments","label":"OCP cooling"}]},"meta":{"found":true,"count":1,"served_from":"site cache (no live upstream calls)","as_of":"2026-10-14T03:01:27+00:00","disclaimer":"Research and information only — not investment advice. Structured records carry basis labels (vendor spec / reported / estimate); market quotes are delayed/indicative.","attribution":"Records compiled from vendor documentation, official filings and reputable public reporting; market quotes via financial data providers. See /data-sources."}}