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

PRODUCT CONFIGURATIONS
STANDARD INSULATING GLASS
The most common insulating glass unit is constructed with two plies of glass and one sealed air space. This configuration is
a dual pane or double pane insulating glass unit, however is commonly shortened to insulating glass. Insulating glass is used
due to the improvement in solar performance it provides. The most significant improvement is thermal performance (u-value)
which improves by approximately 50% when compared to a monolithic glass ply. This improvement occurs whether the glass is
coated or uncoated.
In addition to the improved solar performance,
insulating glass offers a greater availability
of coatings.
1/4" CLEAR MONOLITHIC
1/4" (6mm) clear
1" CLEAR insulating
1/4" (6mm) clear
1/2" (13.2mm) airspace
1/4" (6mm) clear
Low-E coatings which cannot be exposed,
and therefore cannot be used with monolithic
glass, can be used inside the insulating unit
where they are protected by the hermetically
sealed space. Insulating units also have more
aesthetic possibilities than monolithic glass.
The Low-E coating and silk-screen pattern,
if desired, are applied to the exterior ply of
glass leaving the interior ply available for
additional treatment.
For a spandrel location, a full coverage
opaque ceramic frit can be applied to the
inner face (surface #4). For vision areas
where daylight is desired but view through
needs to be minimized, a translucent ceramic
frit can be applied to the surface facing the
airspace (surface #3).
VLT 88%
Winter u-value 1.02
Summer u-value 0.92
SHGC 0.82
1/4" VS1-20 MONOLITHIC
1/4" (6mm) clear with VS-20 #2
VLT 79%
Winter u-value 0.47
Summer u-value 0.49
SHGC 0.70
1" VS1-20 insulating
1/4" (6mm) clear with VS-20 #2
1/2" (13.2mm) airspace
1/4" (6mm) clear
VLT 20%
Winter u-value 0.86
Summer u-value 0.75
SHGC 0.31
VLT 18%
Winter u-value 0.42
Summer u-value 0.43
SHGC 0.23
046 VIRACON // INSULATING GLASS