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

PRODUCT COMPONENTS
SPACERs
MATERIAL
When selecting a spacer material it is necessary to be aware of the different u-values used in the glass industry. Center of glass
(COG) u-values represent the center of the glass. Center of glass values provide an effective way to directly compare glass
products without bias from spacer material, framing or unit size. Edge of glass (EOG) values represent the perimeter of the glass
unit affected by the spacer material. Values are weighted based on the area of the unit to provide an overall u-factor. The overall
value is typically an input needed to run whole building energy calculations and determine code compliance.
COG = 15.7 ft 2 (65%)
EOG = 3.6 ft 2 (15%)
area = 24ft 2
u-factor = 0.4
6’
Aluminum, Stainless Steel and ExtremEdge
are the three spacer material options
available from Viracon. Although aluminum
is the most specified, increasing energy
requirements are escalating the demand for
alternate spacer options to improve edge
of glass (EOG) u-value. Spacer materials
that improve the EOG u-value beyond
the performance offered by aluminum are
commonly grouped together under the
category of warm edge spacers or warm
edge technology.
ALUMINUM
Historically has been the most-used spacer
because of its malleability and availability.
FRAME = 4.7 ft 2 (20%)
STAINLESS STEEL
A warm edge spacer option offered by
Viracon. Stainless steel is less conductive
than aluminum and has one-tenth the thermal
conductivity of aluminum.
4’
E xtremE dge
NEW
Viracon’s newest warm edge spacer
offering. The ExtremEdge spacer consists
of a biopolymer in the cross section area
which is encapsulated in stainless steel.
This combination further reduces the edge
conductivity and thus reduces heat transfer
into the building.
NEW
Learn more at viracon.com.
VIRACON // INSULATING GLASS
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