OpenBEP4EU develops an open-source framework for calculating building energy performance across Europe. By aligning EPCs and SRI methods, it supports comparable, transparent data to improve renovation decisions, public funding allocation, and policy implementation.
OpenBEP4EU is an EU-funded project working to improve how building performance is calculated, compared, and used across Europe. It focuses on Energy Performance Certificates (EPCs) and the Smart Readiness Indicator (SRI), supporting their implementation under the revised Energy Performance of Buildings Directive (EU 2024/1275).
Across Member States, building performance is assessed using different national methods. While these follow a common legal framework, the underlying calculations are not always directly comparable. This makes it harder for public authorities, housing providers, and investors to prioritise renovation, allocate funding, and assess whether policies are delivering results.
OpenBEP4EU addresses this by translating the ISO 52000 family of Energy Performance of Buildings (EPB) standards into open, reusable calculation methods. By making these methods transparent and accessible, the project supports more consistent results across countries while allowing national systems to retain their specific features.
Rather than introducing a new certification scheme, OpenBEP4EU provides a common technical basis that can be integrated into existing tools and workflows. This helps ensure that EPC and SRI results describe building performance comparably, independent of local calculation choices or software implementations.
The project combines technical development with validation in real buildings across different European contexts. This demonstrates how more transparent and harmonised methods can support practical decision-making, particularly in existing buildings and social housing, where targeted improvements can have a significant impact on comfort, energy use, and costs.
Project start: September 2024. Project end: February 2027
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