2 0 1 3 P R O D U C T G U I D E VIRACON PRODUCT GUIDE 2013 ...

PERFORMANCE DATA TABLES
Insulating laminated low-E (Air Filled)
The performance data applies to insulating laminated glass constructed with three plies (clear inboard laminate) of 1/4" (6mm) glass,
a .060 (1.52mm) clear polyvinyl butyral (PVB) interlayer and a 1/2" (13.2 mm) airspace. The coating is applied to the second (#2)
surface.
The solar and optical data presented in this guide is center of glass data based on the National Fenestration Rating Council
measurement standards. They were calculated using Lawrence Berkeley National Laboratory’s (LBNL) WINDOW 5.2/6.3 software.
In some cases performance data changed in comparison to previous versions of LBNL’s WINDOW program.
Product Transmittance Reflectance U-Value
Visible Solar U-V Exterior Interior Solar Winter Summer
Shading
Coefficient
Relative
Heat Gain
VE 1-2M 67% 29%