ISO 16745-2:2017

Sustainability in buildings and civil engineering works — Carbon metric of an existing building during use stage — Part 2: Verification

ISO 16745-2:2017 specifies requirements for the verification of a carbon metric calculation for GHG emissions of an existing building during the use stage, where the carbon metric calculation is performed in accordance with ISO 16745‐1. NOTE Before verification, the carbon metric according to ISO 16745‑1 is a claim. Only after the verification according to this document can the carbon metric be communicated as a carbon metric declaration.

Développement durable dans les bâtiments et les ouvrages de génie civil — Métrique du carbone des bâtiments existants pendant la phase opérationnelle — Partie 2: Vérification

General Information

• Status: Published
• Publication Date: 16-May-2017
• ICS: 91.040.01 - Buildings in general
• Technical Committee: ISO/TC 59/SC 17 - Sustainability in buildings and civil engineering works
• Drafting Committee: ISO/TC 59/SC 17/WG 4 - Environmental performance of buildings
• Current Stage: 9093 - International Standard confirmed
• Completion Date: 14-Sep-2022

Relations

• Revises: ISO 16745:2015 - Environmental performance of buildings — Carbon metric of a building — Use stage
• Effective Date: 05-Nov-2015

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 16745-2
First edition
2017-05
Sustainability in buildings and civil
engineering works — Carbon metric of
an existing building during use stage —
Part 2:
Verification
Développement durable dans les bâtiments et les ouvrages de génie
civil — Métrique du carbone des bâtiments existants pendant la phase
opérationnelle —
Partie 2: Vérification
Reference number
ISO 16745-2:2017(E)
©
ISO 2017

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ISO 16745-2:2017(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2017, Published in Switzerland
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ii © ISO 2017 – All rights reserved

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ISO 16745-2:2017(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Verification . 2
4.1 General . 2
4.2 Procedure for review and independent verification . 2
4.2.1 Independent verification of data . 2
4.2.2 Verification of the carbon metric declaration . 2
4.2.3 Independence and competence of verifiers . 2
4.2.4 Rules for data confidentiality . 3
Bibliography . 4
© ISO 2017 – All rights reserved iii

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ISO 16745-2:2017(E)

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO’s adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following
URL: w w w . i s o .org/ iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 59, Buildings and civil engineering works,
Subcommittee SC 17, Sustainability in buildings and civil engineering works.
This edition of ISO 16745-2 together with ISO 16745-1 cancels and replaces ISO 16745:2015, of which
they constitute a minor revision.
ISO 16745:2015, Clause 7 has been transferred to ISO 16745-2 to keep the requirements for the
verification of the carbon metric declaration independent of the requirements for the carbon metric
calculation, reporting and communication, as well as other minor editorial modifications.
A list of all the parts of the ISO 16745 series can be found on the ISO website.
iv © ISO 2017 – All rights reserved

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ISO 16745-2:2017(E)

Introduction
Buildings contribute approximately one-third of global greenhouse gas (GHG) emissions. With its
high share of emissions, the building and construction sector has the responsibility to take the global
lead in implementing strategies to reduce GHG emissions. The building and construction sector has
more potential and opportunity to deliver quick, deep, and cost-effective GHG mitigation than any
other sectors. Carbon dioxide (CO ) emissions contribute to global warming, which is one of the most
2
recognized environmental impacts attributable to buildings.
In this context, measurement and reporting of GHG emissions from existing buildings are critical
for enabling significant and cost-effective GHG mitigation. Currently, there has not been a globally
agreed method established to measure, report, and verify potential reductions of GHG emissions from
existing buildings in a consistent and comparable way. If such a method existed, it could be used as a
universal tool for measurement and reporting of GHG emissions, providing the foundation for accurate
performance baselines of buildings to be drawn, national targets to be set, and carbon trading to occur
on a level playing field.
In principle, accurate and precise reporting can only be achieved if GHG emissions (and removals) from
all life cycle stages of buildings are measured and/or quantified. However, not all countries in the world
have sufficient capacity or resources to use and apply life cycle assessment (LCA) methodologies.
Respecting the need for collaboration on a global scale, the need exists for a metric that is usable not
only in countries with sufficient number of experts and a precise database, but also in those countries
where experts’ services are limited and databases have considerable gaps. For instance, with the
potential for global scale carbon trading within building-related sectors, a method that is consistently
usable in both the well-developed and developing world is needed.
Operational energy use in buildings typically accounts for 70 % to 80 % of energy use over the building
life cycle. Therefore, the operating stage of the building’s life cycle is the focus of measurement and
reporting of direct and indirect GHG emissions.
This document aims to set out a globally applicable common method of measuring and reporting of
associated GHG emissions (and removals) attributable to existing buildings, by providing requirements
for the determining and reporting of a carbon metric(s) of a building.
The carbon metric is a measure (a partial carbon footprint) that is based on energy use data and
related building information for an existing building in operation. It provides informatio
...