ISO 13391-1:2025
(Main)Wood and wood-based products — Greenhouse gas dynamics — Part 1: Framework for value chain calculations
Wood and wood-based products — Greenhouse gas dynamics — Part 1: Framework for value chain calculations
This document specifies how to calculate the greenhouse gas dynamics of a set of wood and wood-based products on the organizational or aggregated level (the area of study). It includes the greenhouse gas emissions, greenhouse gas removals, or carbon pools related to: — one or multiple forest management unit(s), — harvested wood product(s), — value chain(s), and — potential displacement of greenhouse gas emissions from alternative products replaced by wood-based products. Together, these four components represent the greenhouse gas dynamics of a set of wood and wood-based products. This document sets general requirements and provides overarching terminology. This document specifies the different components of a greenhouse gas dynamics calculation. This document includes information on how claims and declarations can be communicated based on this document, both within the value chain and to customers and consumers. This document is intended to be used by organizations seeking to understand, commit to or contribute to climate change mitigation. These organizations can be either private or public, regardless of type or size, and located in any jurisdiction or any position within a specific value chain.
Produits en bois et dérivés du bois — Dynamique des gaz à effet de serre — Partie 1: Cadre pour les calculs de la chaîne de valeur
General Information
Standards Content (Sample)
International
Standard
ISO 13391-1
First edition
Wood and wood-based products —
2025-04
Greenhouse gas dynamics —
Part 1:
Framework for value chain
calculations
Produits en bois et dérivés du bois — Dynamique des gaz à effet
de serre —
Partie 1: Cadre pour les calculs de la chaîne de valeur
Reference number
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Contents Page
Foreword .iv
Introduction .vii
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Overarching requirements and principles . 7
4.1 General .7
4.2 Organizational requirements .8
4.2.1 General .8
4.2.2 Competence and requirements for the greenhouse gas dynamics calculations .8
4.2.3 Control of information, documents and records .9
5 Methodology of calculating greenhouse gas dynamics for wood and wood-based
products . 9
5.1 General requirements .9
5.1.1 System boundaries .9
5.1.2 Calculation of biogenic carbon . 12
5.1.3 Recycled wood-based material. 13
5.1.4 Allocation . 13
5.1.5 Data quality . 13
5.2 Forest management unit (FMU) .16
5.2.1 General requirements .16
5.2.2 Handling of forest carbon balance for purchased material where data is not
available .16
5.3 Calculating greenhouse gas emissions along the value chain .16
5.4 Calculating the contribution to the HWP carbon pool .17
5.4.1 General .17
5.4.2 Tier 1 – Simplified production approach using a stock change method .18
5.4.3 Tier 2 .19
5.4.4 Tier 3 .21
5.4.5 Reuse .21
5.5 End of life .21
5.5.1 General .21
5.5.2 Landfill . 22
5.5.3 Energy recovery . 23
5.5.4 Recycling for production of various materials . 23
5.5.5 Decomposition without energy recovery . 23
5.6 Displacement potential . 23
6 Reporting .23
6.1 General requirements . 23
6.2 Reporting on the scope of the study . 23
6.3 Reporting on the results of the calculations .24
6.3.1 General requirements for reporting results .24
6.3.2 Reporting results for the forest carbon balance .24
6.3.3 Reporting results of displacement potential calculations .24
7 Communication and claims .24
Annex A (informative) Specifications of carbon pools .25
Annex B (informative) Cross-references between components in the ISO 13391 series and
other reference documents .27
Annex C (informative) IPCC tier approach .31
Bibliography .32
iii
Foreword
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