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To which standard is the U value determined?
The U value for glass is determined in accordance with BS EN 673: Glass in building -
Determination of thermal
transmittance (U value) - Calculation method. It covers the U value of the central area of glass
(centre pane U value)
and excludes any edge effects associated with the spacer or frame into which the glass may be installed.
The U value for a wide range of Pilkington products can be determined using the Pilkington Spectrum calculation tool. Registration is free and simple. To access Pilkington Spectrum, please click here.
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