Ene 01 - Energy and carbon performance for regulated energy uses

GN49 International Ene 01 calculation methodology guidance - KBCN1749

Latest version: v0.0, July 2025 Guidance Note 49 (GN49) gives background information on the methodology for determining the number of credits achieved for energy performance under the Ene 01 assessment issue for BREEAM International NC V7. The Ene 01 methodology uses a triple metric approach that addresses energy demand for heating and cooling, primary energy consumption, and carbon dioxide emissions. The aim of using this approach is to minimise the energy consumption and carbon emissions from regulated energy uses and to maximise the use of low carbon energy sources. Guidance Note 49 also includes the adjustment factors that are applied to uplift the reference metrics in Ene 01 for BREEAM International NC V7. It describes the methodology for determining the factors and the application process to have a country’s adjustment factor added or updated. Download Guidance Note 49 View all Guidance Notes on BREEAM Projects (licensed assessors only)

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