Overview
CEN ISO/TR 52127-2:2021 is a Technical Report that provides explanatory and justificatory material for ISO 52127-1 (module M10‑12) on the energy performance of buildings with emphasis on building automation, controls and building management (BAC/BMS/TBM). Endorsed by CEN and prepared by ISO/TC 205 in collaboration with CEN/TC 247, this informative document supports correct understanding, national adoption and practical application of the normative rules in ISO 52127‑1. It supersedes CEN/TR 16947‑2:2016.
Key Topics
The report clarifies methods, terms and assumptions used when modelling the effect of building automation and control on energy performance. Major technical topics include:
- Role and scope of BAC and TBM in balancing occupant comfort and energy use.
- Control characteristics: control accuracy, control functions and control strategy.
- Time-step and data-input guidance for energy performance calculations and simplified input options.
- List of BMS functions covered (informative descriptions), such as:
- Setpoint management
- Runtime management
- Sequencing of multiple generators
- Local energy production and renewable energy integration
- Heat recovery and heat shifting
- Smart‑grid interactions and peak shaving
- Method selection and practical calculation guidance, including reference to an accompanying spreadsheet tool.
Applications
This Technical Report is intended to help apply ISO 52127‑1 within building energy performance (EPB) assessments and modelling workflows. Typical applications:
- Incorporating building automation controls effects in energy simulation and compliance calculations.
- Defining and documenting BMS strategies for energy optimisation (e.g., interlock, sequencing).
- Supporting national standards bodies and regulators in transposing ISO 52127‑1 into local EPB rules.
- Using the spreadsheet guidance for consistent input data and time‑step handling in energy performance assessments.
Who should use this standard
- Building designers and energy modelers integrating BAC impacts into simulations
- BMS/BAC integrators and system vendors specifying control strategies
- Facility managers and energy managers implementing TBM for operational savings
- Regulatory bodies, certification schemes and standards committees adopting ISO 52127‑1
Related Standards
- ISO 52127-1 - Energy performance of buildings: Building management system (normative part)
- ISO 52000-1 - Overarching EPB assessment: framework and procedures
- ISO 7345 - Thermal insulation: physical quantities and definitions
- CEN/TR 16947-2:2016 (superseded)
This Technical Report is an informative resource to ensure consistent, practical application of building automation and control measures in energy performance assessments and national EPB implementations.
