Roller shutter box U-Value according to EN ISO 10077-2 are calculated for roller shutter boxes.
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Roller shutter box U-value
Summary
•The calculation of the Roller Shutter box Usb-Value for the selected result object is performed either choosing the menu command Results.U-Value>Shutter box Usb Value... or selecting the corresponding result object context menu command or using the U-Value tool kind Shutter box U-Value.
•You can adjust the properties of the Roller Shutter box U-value-value calculation in the Properties flyout. Either you can enter the values directly using the keyboard or using the 
tool by clicking on a compatible object of another file or using the 
tool by clicking on a compatible object to link the calculations.
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