DIN EN 674:2011-09

This European Standard specifies a measurement method to determine the thermal transmittance of glazing with flat and parallel surfaces. Structured surfaces, e. g. patterned glass, can be considered to be flat. The determination of the thermal transmittance is performed for conditions which correspond to the average situation for glazing in practice. The procedure specified in this European Standard should generally only be considered when the calculation method detailed in EN 673 is inappropriate or unsuitable.