REF · Renewable Energy Factor
The share of a facility's energy supplied from renewable sources, a sustainability companion to PUE.
Current numbers
≥500 kWEU EED data-center reporting threshold (~31 data points incl. PUE/WUE/ERF/REF; due 15 May annually)
500 kWEED Article 12 reporting threshold; PUE+WUE+ERF+REF filed annually by 15 May to the EU database
Parts 2/3/6/8/9ISO/IEC 30134 KPIs: PUE, REF, ERF, CUE, WUE (Part 4 ITEEsv for server efficiency)