Carbon metric of an existing building during the use stage
The recently published Parts 1 and 2 of ISO 16745 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 determination and reporting of a carbon metric(s) of a building.
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 (CO2) emissions contribute to global warming, which is one of the most 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. The recently published ISO 16745 series sets 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 information related to the calculation of GHG emissions and can be used as an environmental indicator.
Using this approach, the metric and its protocol can be applied by all stakeholders in both developing and well-developed countries, where building energy consumption and other relevant data can be retrieved or collected, making it useful and globally transferable.
Part 1 of ISO 16745 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. Part 2 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.
ISO 16745 Parts 1 and 2 are developed by ISO/TC 59/SC 17 "Sustainability in buildings and civil engineering works".