Thermal Insulation Performance Labeling of Windows
Windows (sash windows and multiple-layered glass) are additionally Designated of Building Materials subject to the Top Runner Program under the Energy Saving Act. in Nov 2014.
The revised provision additionally defines as building materials to prevent heat loss in buildings that are particularly necessary to improve the rational use of energy, pursuant to the provision of Article 81 (3) of the Energy Saving Act (called “building materials subject to the Top Runner Program”).
Amended:
Announced in May 2011 in that a new method was introduced for measuring thermal transmission rate of a window according to JIS standard.
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