Overview
EN ISO 52000-1:2017 - "Energy performance of buildings - Overarching EPB assessment - Part 1: General framework and procedures" (CEN adoption of ISO 52000-1:2017) defines a systematic, modular framework for assessing the overall energy performance of new and existing buildings. It is applicable to both calculation and measurement approaches and supports assessment in terms of primary energy and other energy-related metrics. The standard is designed to be holistic, covering building design, “as built” verification, in‑use performance and renovation contexts.
Key topics and technical requirements
- Modular, overarching framework for EPB (Energy Performance of Buildings) assessments that integrates multiple EPB standards and methods.
- Assessment methods: procedures for both measured energy performance and calculated performance, and routes to compare the two.
- Output and normalization: definition of output data, normalization to building size (reference floor area), and categorization by building/space types.
- Input data categories: product data, system design data, operating conditions, constants and physical data, and other required inputs.
- Time handling: specification of calculation and measurement intervals and the overall calculation/measurement period.
- Assessment boundary and perimeters: principles for defining what building elements, systems and external supplies are included in the EPB boundary (including multi‑building scenarios).
- Overall energy performance metrics: weighted overall energy balance, use of primary energy factors, greenhouse gas emission factors, and optional additional weighting or cost factors.
- Reporting and comparison: procedures for measured energy reporting and for comparing measured vs. calculated energy performance.
- Terminology and symbols: comprehensive terms, definitions, symbols and abbreviations to ensure consistent EPB assessments.
Applications and users
EN ISO 52000-1:2017 is intended for stakeholders who need consistent, repeatable assessment of building energy performance:
- Energy assessors and certifiers performing compliance checks and EPCs
- Designers and architects using EPB metrics during building design and specification
- Mechanical/HVAC engineers and system integrators defining system boundaries and efficiencies
- Facility managers and building owners monitoring in‑use performance and renovations
- Policy makers and regulators developing energy performance requirements and reference methods
- Researchers conducting building energy studies and benchmarking
Related standards
- Part of the ISO/CEN EPB modular set (see Table 1 in the standard’s Introduction for position within the series).
- EN ISO 52000-1:2017 supersedes EN 15603:2008; it aligns EPB assessment procedures across the broader ISO 52000 family.
Keywords: EN ISO 52000-1:2017, energy performance of buildings, EPB assessment, primary energy, building energy calculation, measured energy performance, building design, renovation, energy certification.
