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prEN 15978 Edition 12/2025
Sustainability of construction works - Assessment of environmental performance of buildings - Requirements and guidance
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Abstract

This document specifies the calculation method, based on Life Cycle Assessment (LCA) and other quantified environmental information, to assess the environmental performance of a building and its site, and gives the means for the reporting and communication of the outcome of the assessment. The standard is applicable to new and existing buildings and refurbishment projects. The document gives: - the description of the object of assessment, - the system boundary that applies at the building level, - the procedure to be used for the inventory analysis, - the list of indicators and procedures for the calculation of these indicators, - demand for information concerning environmental impacts and aspects at the local environment level (including emissions to indoor air), - demand for information concerning building generated energy reporting and design for circularity as technical characteristics that support environmental performance, - the requirements for the data necessary for the calculation, and - the requirements for presentation of the results in reporting and communication. The approach to the assessment covers all stages of the building life cycle and is based on data obtained from Environmental Product Declarations (EPD), their “information modules” (EN 15804:2012+A2:2019) and other data and information necessary and relevant for carrying out the assessment. The assessment includes all building related construction products, processes and services, used over the life cycle of the building. Methodologies for and approaches to the interpretation and the making of value judgments of the results of the assessment are not within the scope of this document. NOTE 1 This document provides system boundaries, calculation rules and indicators to compile and assess the life cycle inventory and life cycle environmental impacts of buildings. NOTE 2 The document also provides the methodological basis and assessment rules to support the achievement of environment related macro objectives in Europe and instruments such as the European reporting framework Level(s). More information can be found at Level(s) (europa.eu).

Status

Draft - Active
If you have any comments on this standard in public inquiry, you can submit them by filling out the   commenting form   .

Origin

Technical Committee :
CEN/TC 350 : Sustainability of construction works

Implementation

start of the vote on the project    02/05/2024   date of ratification (dor)    05/11/2025
end of the vote on the project    25/07/2024   date of anouncement (doa)    03/03/2026
start of the vote on the final project    13/08/2025   date of publication (dop)    03/06/2026
end of the vote on the final project    08/10/2025   date of withdrawal (dow)    03/06/2026


Publication Official Journal
of the Grand-Duchy of Luxembourg
Reference

Relations

Relations to older standards
ILNAS-EN 15978:2011

International Classification for Standards (ICS codes) :

91.040.99 : Other buildings
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