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<p>ISO 16745:2015 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, communication, and verification 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.</p>
<p>ISO 16745:2015 follows the principles set out in ISO 15392 and those described in Clause 4 of the Standard. Where deviations from the principles in ISO 15392 occur, or where more specific principles are stated, ISO 16745:2015 takes precedence.</p>
<p>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.</p>
<p>ISO 16745:2015 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.</p>
<p>ISO 16745:2015 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.</p>
<p>ISO 16745:2015 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.</p>
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<p>ISO 16745:2015 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, communication, and verification 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.</p>
<p>ISO 16745:2015 follows the principles set out in ISO 15392 and those described in Clause 4 of the Standard. Where deviations from the principles in ISO 15392 occur, or where more specific principles are stated, ISO 16745:2015 takes precedence.</p>
<p>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.</p>
<p>ISO 16745:2015 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.</p>
<p>ISO 16745:2015 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.</p>
<p>ISO 16745:2015 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.</p>
