GB/T51141-2015 Evaluation Standard for Green Retrofit of Existing Buildings

Last updated: 4 November 2019

The evaluation standard for green retrofit has been put in place due to the extensive building stock in China, which exceeded 50 billion m2 in 2015. Of those existing buildings, about 30-50% had experienced safety failure or deterioration of building functions as well as poor indoor environmental quality. Therefore, a comprehensive framework encouraging the green retrofit of existing buildings was put in place, including this evaluation standard to assess the overall performance of the buildings. The evaluation is comprehensive and assesses the following aspects of a building:

    • Planning and architecture
    • Structure and material
    • HVAC
    • Water supply and drainage
    • Electricity
    • Construction management
    • Operation management
    • Promotion and innovation.

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End uses covered
  • Building end-uses
  • Building systems
  • Space heating
  • Space cooling
  • Ventilation
  • Water heating
  • Building vintage
  • Existing buildings
  • Energy management systems (buildings)
  • Building envelope