[DB11/ 891 2020]
This standard is edited by Beijing Institute of Architectural Design (Group). “Beijing Design standard for energy efficiency of residential buildings” has been approved by Beijing Municipal Commission of Planning and Natural Resources and Beijing Market Supervision Administration to organize relevant departments and experts, and is now promulgated as the Bejing Construction Standards. The standard, numbered DB11/ 891 2020, which will be implemented from Jan 1st, 2021. The standard will be to increase the energy efficiency for residential buildings from 75% to more than 80% in China firstly, and the heat transfer coefficient value of external windows is increased to 1.1 W/m2･K.