Topic guide
Explore publications on PUE and other data centre performance indicators. Before using a metric for comparison or design decisions, check its measurement boundaries, calculation method and required inputs against the original reference.
169–192 / 212
Digital Realty 2025
Use portfolio PUE of about 1.38-1.4 as the benchmark for multi-tenant colocation (against hyperscale about 1.1 and industry about 1.54).
ASHRAE TC 9.9 2021
Add class H1 and the W17/W27/W32/W40/W45/W+ facility-water classes to the thermal catalog as enumerations.
TÜV NORD 2026
In an 'EN 50600' standards profile, offer separate availability-class selectors for power, cooling and cabling (instead of a single Tier), plus a protection-class selector per room or zone
U.S. EPA / ENERGY STAR 2024
Write ENERGY STAR Version 4.0 certification and the PSU efficiency steps (at 10% to 100% load points) into the server procurement specification; look especially at 10% and 20% load efficiency for redundant supplies that run lightly loaded.
U.S. EPA / ENERGY STAR 2014
Design sub-metering for IT energy at the UPS output and feed it into monitoring with monthly records; this is a precondition for the score.
European Commission, DG Communications Networks, Content and Technology (DG CONNECT) 2020
Use the regional and size-based values for first-pass PUE assumptions, but treat them as 2018-and-earlier averages and as historical context, not as a current target.
Google 2026
In the efficiency dashboard show three PUE references: design PUE, partial-load PUE (at 25/50/75% IT load) and benchmarks (Google 1.09 hyperscale; Uptime 1.54 industry).
Schneider Electric 2015
Build the PUE calculator on an explicit load-classification table: each catalog component is IT, infrastructure, excluded or shared.
The Green Grid (Global Metrics Harmonization Task Force) 2014
Present PUE, partial PUE, REF/GEC, ERF, WUE and CUE as one consistent metric set in every report.
Schneider Electric 2017
Default to hot-aisle containment for new designs; if containment is deferred, reserve the provisions and space for a future HACS.
Schneider Electric 2011
Expose a 'value of a kW' widget: lifetime cost = 8.76 MWh/yr x tariff x PUE x life (default $0.12/kWh, 10 years) plus a capacity-cost term.
NREL 2018
Fix two design temperatures early, the coolest supply you can produce on the hottest day and the return temperature needed for heat reuse, and select IT equipment against them.
The Green Grid 2016
For designs capturing at least 70-80% of heat to liquid with chiller-less warm-water loops, set the PUE target near 1.1.
Microsoft 2025
Expose climate-driven partial PUE/WUE in site comparison; flag that hot-humid regions (e.g. APAC tropics) give about 0.1 higher PUE for the same design.
Meta 2025
Take hyperscale best-in-class WUE of about 0.2 L/kWh (withdrawal basis) and PUE of about 1.08 as benchmarks.
Schneider Electric 2025
Allow an hourly (8760 h) emission-factor profile input in the carbon calculator, falling back to the annual average.
Schneider Electric 2023
Add embodied-carbon parameters to the catalog: kgCO2e per server, per kW of UPS or cooling, and per m2 of building.
The Green Grid (multi-org task force) 2011
Tag every PUE result with a category (0-3) and period; report the design-model PUE as category 3-equivalent annual energy.
U.S. EPA / ENERGY STAR 2007
Use it for historical context on PUE: knowing that 2.0 was the 2007 average starting point, compare your current target PUE values against that reference.
NREL 2018
Check whether the warm return water from liquid cooling (here 84 °F after energy recovery) leaves enough temperature difference to ambient for a dry or hybrid stage, and size it against local dry-bulb hours.
Türk Standardları Enstitüsü (TSE) Year not stated
In new references, look to CLC/TS 50600-5-1:2023 rather than CLC/TR 50600-99-1.
Türk Standardları Enstitüsü (TSE) Year not stated
Do not treat this record as a design requirement, and do not encode a national version number for 99-2 in checklists.
Türk Standardları Enstitüsü (TSE) Year not stated
Do not encode a dated TS or EN edition for 99-3 in the rule engine; the record does not prove edition equivalence.
Türk Standardları Enstitüsü (TSE) Year not stated
Cite 'CLC/TS 50600-4-31:2024' when referring to it in an availability assessment.
All content and rights belong to the respective authors and publishers. SoSo CAD provides only the citation, its own summary and a link to the source, and is not responsible for the sources' content.
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