U values for windows
Formula for calculating the total U value of a window, taking into account the glazing unit, the share of profiles and an edge zone effect linear factor.
Uwindow = ( Ag * Ug + Af * Uf + Ig * ψg ) / ( Ag + Af )
The links below present tables with the total U value of a window for different glazing units and spacer bar. The calculations should be based on applicable standards and requirements.
U-value double glazing with warm edge spacer bar
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Window
1230 × 1480 mm
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U-value of glass Ug W/m2K (middle point)
Warm edge spacer bar
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Ug |
1,0
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1,1
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1,2
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1,3
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1,4
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1,5
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1,6
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Opening window
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1,5 |
1,5 |
1,6 |
1,7 |
1,8 |
1,8 |
1,9 |
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For more information please contact our Architect Support
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