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Specifies a measuring method used to determine the coefficient of thermal transmittance, the U-value, of multiple glazing with flat and parallel surfaces, including cast and figured rolled glass. Applies to multiple glazing with outer panes which are not transparent to far-infrared radiation, which is the case for normal window glass. Internal elements may be far-infrared transparent.
||Glass in building - Determination of steady-state U values (thermal transmittance) of multiple glazing - Guarded hot plate method