Mandatory implementation of consumption efficiency grades from July 1, 2012
※ Relevant Basis: Regulations on Promotion of Rationalization of Energy Use in Public Institutions (Knowledge Economy Notice No. 2012-18)
Regulations for Operation of Equipment and Materials for Efficiency Management (2012.10.05. Notice No. 2012-227)

Scope of application of consumption efficiency grade window set
※ Relevant Basis: Regulations for Operation of Efficiency Management Equipment and Materials (Notice No. 2018-99)
·Efficiency rating system window set received by adding glass to the window frame
The same glass as the test report should be used for efficiency grade.

full text of relevant laws and regulations
20. Window Set
1. Scope of application
As a set of windows under KS F 3117, the area of the windows is used in the building in contact with the outside air.
Only a set of windows that are more than 1m2 and sold with a combination of frames and glass.