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1" (25mm) Insulating VS1-20

1" (25mm) Insulating VS1-20

1/4" (6mm) clear with VS-20 #2 and 20% coverage V175 High-Opacity White #2
1/2" (13.2mm) space - argon filled
1/4" (6mm) clear

Reflected Color
Transmitted Color

Performance Data

Show data as:

Transmittance

Visible Light
15%
Solar Energy
11%
UV
6%

Reflectance

Visible Light-Exterior
26%
Visible Light-Interior
34%
Solar Energy
22%

NRFC U-Value

Winter
0.39 (hr x sqft x °F)
Summer
0.41 (hr x sqft x °F)
Shading Coefficient
0.24
Relative Heat Gain
53Btu/(hr x sqft)
Solar Heat Gain Coefficient (SHGC)
0.21
LSG
0.71

Viracon's solar and optical performance data is center of glass data based on the National Fenestration Rating Council measurement standards, calculated using Lawrence Berkeley National Laboratory's (LBNL) WINDOW 7 software.

Winter and Summer U-Values are the only performance values available for spandrel glazing. The U-Values for spandrel glazing are the same as the corresponding vision unit. The spandrel color does not impact U-Value.