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WG 12 is asked to review and elaborate the issues associated in the measurement of declared and design values of the thermal performance of products based upon or utilising reflective or low emissivity surfaces.
To provide guidance on how to determine declared and design values for such products, WG 12 shall review all product data, published reports and relevant CEN test and calculation standards, including EN 12664, EN 12667, EN ISO 8990, EN ISO 10456, and EN ISO 6946.
WG 12 is also asked to consider appropriate methods for the measurement of emissivity for both type testing and factory production control.
WG 12 shall consider whether a single technical specification, which addresses all the issues, or a series of amendments/addenda to existing standards is most appropriate.
