Comparative analysis of domestic building carbon emission calculation standards

Driven by the “dual carbon” goals, China’s building carbon emission calculation standards have entered a phase of intensive updates. Based on the whole life cycle theory framework, this study systematically compares six current domestic building carbon emission calculation standards, with a focus on deconstructing their commonalities and differences across three core dimensions: calculation boundaries, calculation methods, and calculation parameters. The study finds that various standards have achieved innovative breakthroughs in areas such as refined operational phase measurement, proportional coefficient estimation, carbon emission factors for new building materials and construction methods, and the development of regional carbon emission intensity indicator databases. The findings not only provide multi-dimensional methodological options for whole life cycle carbon emission calculation in buildings, but also offer optimization pathways to promote iterative upgrades in industry carbon emission calculation standards, demonstrating significant guiding value.