Key performance data
According to EN 1435-1, a one-off addition of up to 0.3 W/m2K can be applied to the Uw value for metal bars. With the SWISSPACER Georgian bar, however, that is not necessary because cold bridging within the insulating glass unit is avoided. This difference can also be illustrated in numbers: With CALUWIN, you can also quickly calculate the Uw values for insulating glass unit with bars very easily online or with the CALUWIN app for iOS and Android devices.
The comparison in numbers
*SWISSPACER Georgian bar ψg = 0.040 W/m2K
*Aluminium bar ψg = 0.070 W/m2K
The length-related heat transfer coefficient ψ (Psi) is much lower with the SWISSPACER Georgian bar than with aluminium bars, while the negative impact on the window’s energy efficiency is minimised. You can find the actual calculation and much more information in the extensive product brochure.