Legacy air-cooled data center PUE reference band: Uptime DX example about 1.40 and the about 1.6 industry average cited for traditional air-cooled facilities
~1.4–1.6estimate
| Value kind | estimate — Interpret this value according to its displayed kind, scope, source, and as-of date. |
|---|---|
| Scope | Cited screening band, not a measured population; a site’s legacy-air result follows its compressor hours and containment. |
| As of | 2025-10 |
| Source | CIBSE Journal, CPD Module 254: Liquid cooling in data centre applications, October 2025 (month known; day set to the first): most traditional data centres operate with PUE values around 1.6; the 1.40 lower bound is Uptime Institute’s June 2016 DX-mode example, and SemiAnalysis (13 February 2025) cites the same ~1.6 Uptime industry average. |
| Review | checking…review by 2027-03-08 · standard cadence |
| Recorded changes | last 2026-09-16 |
| Claim id | p2b-15-2-legacy-air-pue-band |
Where the guide uses it
← Full numbers register — every date-stamped figure in the guide, with revision history.