GB/T 11976-2015
ActiveGraduation and test method of daylighting properties for external windows
建筑外窗采光性能分级及检测方法
Application Summary AI generated
This standard specifies the classification levels and testing methods for the daylighting performance of external windows, including parameters such as light transmittance and daylighting area ratio. It is applied in the construction industry for evaluating and certifying the natural lighting efficiency of windows used in residential, commercial, and public buildings. The standard provides a uniform basis for quality control during product development, factory inspection, and building energy performance assessment.
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Transparency note: The application summary and key sentences on this page were automatically generated by AI from the standard's original text. This content has not been human-verified and should not be used for compliance or regulatory purposes. Always refer to the official standard document from the issuing authority.