BS ISO 16745-1:2017

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principles
5 Protocol of measuring the carbon metric of a
  building in the use stage
6 Reporting and communication of the carbon
  metric
Annex A (informative) - Aim of carbon metric
Annex B (informative) - Building energy use
        defined by usage by ISO 12655
Annex C (informative) - Types of factors or
        coefficients by ISO 16346
Annex D (informative) - Allocation of emissions
        related to target energy in combined heat and
        power generation by VDI 4660 Part 228
Annex E (informative) - Status of ISO 16745 and
        other documents and concepts related to the
        description and assessment of greenhouse gas
        emissions caused by buildings
Bibliography

Gives requirements for determining and reporting a carbon metric of an existing building, associated with the operation of the building.

This document provides requirements for determining and reporting a carbon metric of an existing building, associated with the operation of the building. It sets out methods for the calculation, reporting and communication of a set of carbon metrics for GHG emissions arising from the measured energy use during the operation of an existing building, the measured user-related energy use, and other relevant GHG emissions and removals. These carbon metrics are separated into three measures designated CM1, CM2, and CM3 (see 5.1.1).

This document follows the principles set out in ISO15392 and those described in Clause4. Where deviations from the principles in ISO15392 occur, or where more specific principles are stated, this document takes precedence.

The carbon metrics CM1 and CM2 are not quantified based on life cycle assessment (LCA) methodology. Carbon metric CM3 may include partial quantification based on the results of LCA.

This document does not include any method of modelling of the operational energy use of the building but follows the conventions provided by other International Standards, as given in relevant clauses.

This document is not an assessment method for evaluating the overall environmental performance of a building or a building-rating tool and does not include value-based interpretation of the carbon metric(s) through weightings or benchmarking.

This document deals with the application of the carbon metric(s) for an existing building, either residential or commercial, or a building complex. It does not include provisions for regional and/or national building stock.