Cooling share of non-IT (overhead) energy in air-cooled reference breakdowns
~55–70% (reference breakdowns)estimate
| Value kind | estimate — Interpret this value according to its displayed kind, scope, source, and as-of date. |
|---|---|
| Scope | Air-cooled reference breakdowns, not a measured AI-hall population. The LBNL data are mid-2000s, and EPRI's unallocated "Other 11%" makes the upper bound uncertain. In warm-water DLC halls the power chain is a larger share of a much smaller overhead. |
| As of | LBNL 22-site study via EPRI (2011); DC Atlas illustrative model (2026-02) |
| Source | EPRI 1024624 (Nov 2011), Table 1 citing LBNL: HVAC cooling 23% + fans 8% of facility power; DC Atlas, Breaking down PUE (2026-02-12): illustrative 100 MW model, cooling 22 MW = 63% of non-IT power |
| Review | checking…review by 2027-10-16 · standard cadence |
| Recorded changes | last 2026-10-16 · 3 revisions tracked |
| Claim id | cooling-share-of-non-it-overhead-energy-the |
Where the guide uses it
← Full numbers register — every date-stamped figure in the guide, with revision history.