ERF · Energy Reuse Factor
Fraction of facility energy exported as useful heat (e.g. district heating); a rare metric where higher is better.
Fraction of facility energy recaptured and exported as useful heat rather than rejected to atmosphere.
Also written as: Energy Reuse Factor
Current numbers
≥500 kWEU EED data-center reporting threshold (~31 data points incl. PUE/WUE/ERF/REF; due 15 May annually)
10% / 15% / 20%German EnEfG Energy Reuse Factor minimum for new data centers (2026 → 2028)
≥500 kWEU EED Delegated Reg. (EU) 2024/1364 reporting threshold; ERF reported alongside PUE, WUE, REF to the EU database (~31 data points)