Design standard for energy efficiency of residential buildings in Liaoning Province

[DB21/T 2885-2017]

The “Design Standard for Energy Efficiency of Residential Buildings in Liaoning Province” is approved by the Liaoning Provincial Department of Housing and Urban-Rural Development and compiled by the Liaoning Academy of Science and Technology and the relevant departments, which is the local standard of Liaoning Province and the record number is DB21/T 2885-2017. This standard has been implemented since December 16th, 2017, which energy conservation standard has been further increased to 75%. According to the climatic zone of the severe cold (C) and cold (A) areas in Liaoning Province, the heat transfer coefficient of the external window is respectively limited from1.6 to 2.2, and from 1.5 to2.0 K [W / (m2·K)], the level of air tightness requirement for outsides window (door) and the open balcony door is class 7.