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BS 6993-2:1990 Thermal and radiometric properties of glazing. Method for direct measurement of U-value (thermal transmittance)
standard by BSI Group, 07/31/1990
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Method for measuring the transmittance of the central area of single, double or multiple glazing using hot box apparatus complying with BS 874-3.1. The edge effect due to the thermal bridge through the spacer of double or multiple glazing is effectively eliminated by this method.Cross References:
BS 874:Part 1
BS 874:Section 2.1
BS 874:Section 3.1
BS 6993:Part 1