EnEfG · Energieeffizienzgesetz (German Energy Efficiency Act)
Germany's efficiency law, which converts heat reuse from optional economics into a minimum obligation for new data centers above a power threshold.
Current numbers
10% → 20%German EnEfG Energy Reuse Factor minimum for new data centers (2026 → 2028)
ERF 10% → 15% → 20%Germany EnEfG minimum energy-reuse factor by DC commissioning year: 10% from Jul-2026, 15% from Jul-2027, 20% from Jul-2028
10% -> 15% -> 20%minimum ERF mandated for new German data centers, July 2026 / 2027 / 2028 (EnEfG)