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1" (25mm) Insulating with RoomSide Low-E VP24-13

1" (25mm) Insulating with RoomSide Low-E VP24-13

1/4" (6mm) Optiwhite™ with VP-13 #2
1/2" (13.2mm) space - air filled
1/4" (6mm) RoomSide™ Low-E #4

Reflected Color
Transmitted Color

Performance Data

Show data as:

Transmittance

Visible Light
13%
Solar Energy
10%
UV
11%

Reflectance

Visible Light-Exterior
31%
Visible Light-Interior
45%
Solar Energy
30%

NRFC U-Value

Winter
0.32 (hr x sqft x °F)
Summer
0.30 (hr x sqft x °F)
Shading Coefficient
0.21
Relative Heat Gain
46Btu/(hr x sqft)
Solar Heat Gain Coefficient (SHGC)
0.18
LSG
0.72

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.