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1-3/4" (44mm) Triple Insulating (Single Coating) VP1-18

1-3/4" (44mm) Triple Insulating (Single Coating) VP1-18

1/4" (6mm) clear with VP-18 #2
1/2" (13.2mm) space - argon filled
1/4" (6mm) clear
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
9%

Reflectance

Visible Light-Exterior
24%
Visible Light-Interior
42%
Solar Energy
20%

NRFC U-Value

Winter
0.26 (hr x sqft x °F)
Summer
0.29 (hr x sqft x °F)
Shading Coefficient
0.22
Relative Heat Gain
49Btu/(hr x sqft)
Solar Heat Gain Coefficient (SHGC)
0.19
LSG
0.79

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.