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1" (25mm) Insulating VS1-20

1" (25mm) Insulating VS1-20

1/4" (6mm) clear with VS-20 #2 and 40% 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
13%
Solar Energy
9%
UV
5%

Reflectance

Visible Light-Exterior
28%
Visible Light-Interior
34%
Solar Energy
23%

NRFC U-Value

Winter
0.39 (hr x sqft x °F)
Summer
0.41 (hr x sqft x °F)
Shading Coefficient
0.22
Relative Heat Gain
49Btu/(hr x sqft)
Solar Heat Gain Coefficient (SHGC)
0.19
LSG
0.68

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.