{"data":{"slug":"air-cooling","etype":"tech","name":"Air Cooling","cat":"Cooling","subtitle":"Fans, heatsinks and hot aisles — sufficient until ~40 kW per rack.","summary":"Traditional data centers move heat with server fans, hot/cold aisle containment and CRAH units. Air remains fine for storage, CPUs and inference cards, but at Blackwell-class densities the physics stop working: a 120 kW rack would need hurricane-grade airflow. Air's era at the AI frontier ended with Hopper.","attrs":null,"kf":null,"aliases":["air cooled"],"ticker":null,"exchange":null,"hq":null,"founded":null,"website":null,"status":null,"region":null,"asof":"2026-01-15","sources":[{"url":"https://www.ashrae.org/","label":"ASHRAE datacom guidance"}]},"meta":{"found":true,"count":1,"served_from":"site cache (no live upstream calls)","as_of":"2026-10-14T11:46:39+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."}}