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This standard was issued on July 30, 2008 and implemented on March 1, 2009.

This standard replaces GB T 8484-2002 "Classification and Testing Methods for Thermal Insulation Performance of Building Exterior Windows" and GB T 16729-1997 "Classification and Testing Methods for Thermal Insulation Performance of Building Exterior Doors".

The main changes in this standard compared with GB T 8484-2002 and GB T 16729-1997 are as follows:

The detection content of anti-condensation factor of building exterior doors and windows affecting the indoor environmental quality of buildings was added.

It is clarified that other types of doors, windows and glass with thermal insulation requirements can be referred to and implemented;

The definition of thermal resistance has been removed;

The definition of anti-condensation factor has been added;

The definition of heat flux coefficient has been added;

Added the definition of glass doors;

Adjust and merge the grading index values of external doors and windows thermal insulation performance;

The grading regulations on the anti-condensation factor of glass doors and exterior windows have been added;

The principle of anti-condensation factor detection, the installation of testing devices and specimens, the provisions of testing procedures, and the calculation method of CRF value of anti-condensation factor are added.

According to the principle of coordination with the energy efficiency labeling of building doors and windows, the air temperature setting range of the cold and hot boxes of the detection device was modified.

The normative appendix "Calibration of heat flux coefficient" has been added (see Appendix A);

The normative appendix "Arrangement of test points for anti-condensation factor" (see Appendix C) has been added;