The September 2026 BEEO amendments extend registered energy assessor scope to include large computing installations. For most Hong Kong data-hall operators, the practical change is a shift from annual self-reported PUE to independently verified PUE with a defined measurement boundary.
Schedule 4 Type 10 and 11 data centres must complete a BEEO energy audit of central building services installations every five years by a Registered Energy Assessor. There is no 7,000 m² GFA exemption for data centres — a detail that still surprises some operators.
The measurement boundary is the detail that catches teams out. If your PUE is calculated at the utility meter but excludes shared chiller plant, the assessor will require a reconciliation. Start that reconciliation now, while you still have a full audit cycle to close gaps.
Expect assessors to ask for trending, not spot readings: PUE across the audit window, chiller and CRAH efficiency by asset mapped to load, and cooling-water consumption where applicable. Continuous data beats a one-off consultant sweep.
Reliability engineering and energy audit readiness share the same foundation: a clean technical hierarchy and trustworthy telemetry. Operators who refresh hierarchy for AI density will find BEEO prep substantially easier.
If you have not yet scoped a REA engagement, do it this quarter. The calendar is fixed; your sensor coverage and documentation readiness are not.
- No 7,000 m² exemption for data centres under BEEO Schedule 4 Type 10/11.
- Define and reconcile the PUE measurement boundary early.
- Assessors want trends and asset-level efficiency — not a single snapshot.
- Hierarchy + telemetry work for both reliability and audit readiness.
