viracon insulating glass

insulatingglassspecs &tech

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controlling the temperaturewemake you feel comfortable

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IWhy Viracon?

For over 37 years,

architects, designers

and contactors

throughout the world

have come to rely on

our proven expertise

to make Viracon the

company to go to

when it comes to

exploring a variety of

glazing options. We

invite you to sit down,

tell us your thoughts,

and together we’ll

come up with a way

to make it all work.

Seven World Trade Center

New York, New York

Architect: Skidmore Owings & Merrill LLP

Glazing Contractor: Permasteelisa

Cladding Technologies, Ltd.

Glass Type: VRE15-59

Photographer: Greg West Photography

Viracon Insulating Glass is available in

a wide variety of choices using tints,

silk-screened patterns and Low-E and

reflective coatings to achieve the specific

designs, transmission levels and the

solar control options you’re looking for.

We welcome the challenge to help you

spec Viracon Insulating Glass in new and

imaginative ways to get the perfect com-

bination of aesthetics and performance.


viraconsultingtFIELD SALES REPRESENTATIVES

We’re here to help with design assistance, budget costing, return on

investment costing, spec writing and review as well as act as a liaison

between architects and glazing contractors. We also work closely with

the glazing contractor to offer assistance with initial costs, final pricing

negotiations, product information and job site inspections. Just ask.

ACCOUNT REPRESENTATIVES & CUSTOMER SUPPORT

Call on us to help with quoting, product performance data, pricing, project

coordination, samples and mockups. All it takes is a phone call.

techelpNeed an answer—fast? Our Architectural Technical Services group, along with

our Architectural Design group, can assist you with specification and design

assistance, performance and environmental analyses, structural calculations,

energy payback, hurricane requirements and security threat levels. No problem.

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Viracon insulating glass

TERMS AND DEFINITIONS

Solar Spectrum

The solar spectrum, commonly referred to as sunlight, consists of ultraviolet

light (UV), visible light and infrared (IR). The energy distribution within the

solar spectrum is approximately 2 percent UV, 47 percent visible light and 51

percent IR (see Figure 1). One aspect of the solar spectrum is its wavelength

in which nanometer (nm) is the unit of length [1 nm = 10-9 m].

UV is invisible to the human eye and has a wavelength range of ~300 - 380

nm. The damaging effects on long-term UV exposure results in fabric fading

and plastic deterioration.

Visible light is the only portion of the solar spectrum visible to the human

eye. It has a wavelength band of ~380 - 780 nm.

IR is invisible to the human eye, has a wavelength range of ~790 - 3000 nm

and has a penetrating heat effect. Short-wave IR converts to heat when it is

absorbed by an object.

Heat Transfer Methods

Heat transfers from one place to another via convection, conduction or

radiation. Convection occurs from the upward movement of warm, light air

currents. Conduction occurs when energy passes from one object to another.

Radiation occurs when heat is sent through space and is capable of traveling

to a distant object where it can be reflected, absorbed or transmitted

(see Figure 2).

Solar Energy

When solar energy meets glass, portions of it are reflected, absorbed or

transmitted – giving you the RAT equation (see Figure 3).

RAT Equation

The RAT equation accounts for 100 percent of solar energy, which is equal to

the sum of solar reflectance, absorption and transmittance. For example, with

a single pane of 1/8" (3 mm) clear glass, 83 percent of solar energy is trans-

mitted, 8 percent is reflected and 9 percent is absorbed by the glass. Of the

solar energy absorbed, portions are emitted back towards the exterior and

towards the building interior (see Figure 4).

Solar Control

The visible light and IR portions of solar energy are an essential part of

sunlight, since they represent nearly 100 percent of the solar spectrum.

As a result, each plays an important role when glass is selected as a glazing

material for commercial building applications. To enhance thermal

performance, thin metallic films are applied to one or more glass surfaces.

Solar Reflective Coatings

Solar reflective coatings reduce solar heat gain through higher reflection and

absorption with the glass appearing mirror like. Typically, the coating reflects

and absorbs high amounts of visible and IR portions of the solar spectrum.

As a result, heat gain is dramatically reduced, but the trade off is lower light

transmission through the glass.

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SolarRadiation

Thermal Radiation

Convection &Conduction

T 83%

3%6%

R 8%

1/8" (3 mm) Clear Glass

100%A 9%

T

eR =A =T =e =

R

A

Reflection Absorption Transmission emission

Ultraviolet

2%

51%

InfraredVisible

47%

Figure 1

Figure 2

Figure 3

Figure 4

Solar Spectrum

Thermal Heat Transfer

RAT Equation


Low-Emissivity Coatings (Low-E)

Low-Emissivity coatings, which are applied to glass, reflect invisible long-wave

infrared or heat. They reduce heat gain or loss in a building by redirecting the

heat. In addition, they provide greater light transmission, low reflection and

reduce heat transfer.

Condensation Formation

Condensation forms on glass when the glass temperature falls below the

dewpoint of the air. To prevent condensation from forming, the glass

temperature needs to be higher than the dewpoint of ambient air. That’s why

it is critical to choose a glass product that addresses these concerns, such as

insulating glass.

For instance, insulating glass units decrease the potential for condensation

formation on roomside glass surfaces by “insulating” the inboard glass ply

from conductive/convective heat loss to the outside.

This “insulation,” using an air space between the two glass plies, results in

a more stabilized interior glass temperature. Unfortunately, insulating glass

alone may not totally eliminate condensation formation in extreme climates.

To lessen this risk, a Low-E coating can be applied to the insulating unit.

Insulating Glass

Inherently, insulating glass increases a window’s thermal performance. It is

constructed with two or more glass plies, separated by a desiccant-filled

spacer and sealed with an organic sealant. The desiccant absorbs the insu-

lating glass units internal moisture. The sealant may be the standard black

silicone and PIB or you may choose a gray silicone/ PIB sealant (see Figure 5).

Viracon uses mill finish and black painted spacers. We also offer a stainless

steel spacer for warm edge performance.

Viracon’s insulating glass products offer a wide range of performance levels,

as well as aesthetic options.

VIRACON GLASS

Viracon High-Performance Reflective Insulating Glass

This type of glass combines the thermal advantages of insulating glass with

the superior solar control characteristics of reflective coatings.

Viracon Low-E Insulating Glass

When applied to a variety of glass substrates, Viracon’s Low-E coatings offer

a balance between light transmission and solar energy control.

Each coating offers high visible light transmittance, low exterior reflectance

and the lowest U-values available; thereby, reducing radiant heat transfer

(see Figure 6).

By combining tinted glass with silk-screened patterns and Low-E coatings,

the building design professional can achieve unique, custom glass designs.

Viracon VRE (Radiant Low-E)

Viracon’s VRE high-performance coatings allow designers to balance aesthetics,

along with the economical necessity of reducing solar heat gain and the

psychological need for natural light. The product, available in 5 levels of light

transmittance, provides a crisp neutral exterior appearance and soothing

tones to the interior, allowing two-way vision through the glazing under

varying lighting conditions. In addition, VRE coatings offer an efficient blend

of u-values as low as any coatings along with reduced solar heat gain not

previously available with Low-E products.

Viracon VNE (Neutral Low-E)

Viracon’s VNE high-performance glass is the latest revolution in solar control

glass coatings to offer you an innovative alternative for your glass selection.

VNE blends the low reflectivity of traditional Low-E (VE) coatings with the

improved solar control characteristics of the Radiant Low-E (VRE) coatings.

The result is a new glazing option with low solar heat gain, low reflectance

and an ultra-subtle neutral reflected color architects have been asking for.

The real beauty of VNE is that it provides an appealing visual balance without

dominating the building façade.

Commercial Applications

Many commercial building designs feature large ratios of glass-to-wall areas,

which translate into a greater potential for increased heat gain. What’s more,

secondary sources, such as people, office machines and artificial lighting

generate heat within a building. Consequently, the emphasis is on reducing

heat gain into the building interior.

Low-E coatings on tinted glass play an important role in thermal performance

by possessing high visible light transmission and low heat transfer properties.

What’s more, Low-E coatings on tinted glass reduce glare.

When short-wave solar energy (IR) strikes the tinted exterior glass ply it is

absorbed and converted into long-wave infrared or heat. By applying a Low-E

coating to the second (#2) surface, the heat is reradiated back outdoors,

reducing the heat gain potential into the building interior (see Figure 7).

Exterior PlySight Line 1/2"

± 1/8"

Desiccant

#3 Surface

Interior Ply

#1 Surface

Primary Seal PolyisobutyleneSecondary Seal

#2 Surface

#4 Surface

5

300

800

900

1000

1100

1200

1300

1400

1500

1600

1700

1800

1900

2000

2100400

500

600

700

10

20

30

40

50

60

70

80

90

Visible Infrared

VE 1-85

Visible (Light)

VE 1-2M (Solarscreen 2000)

VE 1-2M VE 1-85 VE 1-55 VE 1-52 VE 1-42 VE 1-40

W A V E L E N G T H (nanometer)

TR

AN

SM

ITTA

NC

E(%

)

Infraredt(Heat)

Visible Light

(Short Wave) IR (Long Wave)

IR Radiation

Solar Energy

Low-Emissivity Coating

Exterior Glass TintedInterior Glass

ClearCoating #2 Surface

Figure 7

Commercial Application

Insulating Glass Unit

Figure 5

Figure 6


Vision/Spandrel Match

Often a project may require spandrel glass to harmonize with the vision

areas of your building. However, this is sometimes difficult to achieve when

high-light transmitting or low-reflective glass types are used. Instead, the

use of low-light transmitting and high-reflective glass types provide the

least contrast between vision and spandrel areas under a variety of lighting

conditions.

In addition, variable sky conditions can also influence our perception of

glass color and general appearance. On a bright, sunny day, the exterior

light intensity is approximately 50 to 100 times greater than the interior

lighting level. When viewing the glass from the outside, the dominant

visual characteristic is the exterior reflection. On gray, overcast days,

a greater visual disparity is created between vision and spandrel areas.

This is due to the transparency of the vision glass and the perception of

depth created by interior lighting. The non-vision areas tend to look flat

and two-dimensional by contrast.

Because spandrel glass is virtually opaque, it can only be viewed in reflec-

tion. On the other hand, vision glass possesses a degree of transmission.

As the transmission of the vision glass increases during overcast conditions,

interior lighting becomes more prevalent. Viracon recommends viewing

glass samples or full-size mockups to match vision and spandrel glass areas

when the vision glass light transmission exceeds 14 percent.

Greater contrast between vision and spandrel areas occurs when using

uncoated, tinted glass (green, bronze, blue, etc.) or high transmission

Low-E coatings. Under these conditions, insulating spandrel units can

create the illusion of depth and approximate the vision glass more closely.

By keeping the vision and spandrel glass construction similar (the same

exterior glass color, coating, etc.), the contrast can be minimized under

various lighting conditions. Viracon recommends a neutral colored ceramic

frit on the number four (#4) surface.

ENERGY TERMS

Visible Light Transmittance

The percentage of visible light (380 - 780 nm) that is transmitted through

the glass.

Solar Transmittance

The percentage of ultraviolet, visible and near infrared energy (300 - 3000

nm) that is transmitted through the glass.

Visible Light Reflectance

The percentage of light that is reflected from the glass surface(s).

Solar Reflectance

The percentage of solar energy that is reflected from the glass surface(s).

NFRC U-Value

A measure of heat gain or heat loss through glass due to the differences

between indoor and outdoor temperatures. These are center pane values

based on NFRC standard winter nighttime and summer daytime conditions.

U-values are given in BTU/(hr*ft2*°F) for the English system. Metric

U-values are given in W/(m2*°K)*.

*Note: To convert from English to metric, multiply the English U-value

by 5.6783.

NFRC winter nighttime U-values are based on an outdoor temperature of

0°F (-17.8°C), an indoor temperature of 70°F (21°C) and a 12.3 mph (19.8

km/h) outdoor air velocity.

NFRC summer daytime U-values are based on an outdoor temperature of 89°F

(32°C), an indoor temperature of 75°F (24°C), a 6.2 mph (10.1 km/h) outdoor

air velocity and a solar intensity of 248 BTU/(hr*ft2*°F) (782 W/m2).

R-Value

Thermal resistance is expressed in ft2*hr*°F/BTU). It is the reciprocal of

U-value. The higher the R-value, the less heat is transmitted through the

glazing material.

Shading Coefficient

Shading coefficient is the ratio of solar heat gain through a specific type of glass

that is relative to the solar heat gain through a 1/8" (3 mm) ply of clear glass

under identical conditions (see Figure 8). As the shading coefficient number

decreases, heat gain is reduced, which means a better performing product.

Relative Heat Gain (RHG)

The amount of heat gained through glass taking into consideration U-value

and shading coefficient. Using the NFRC standard, relative heat gain is

calculated as follows:

English System:

RHG = Summer U-value x 14°F + shading coefficient x 200.

Metric System:

RHG = Summer U-value x 7.8°C + shading coefficient x 630.

Solar Heat Gain Coefficient (SHGC)

The portion of directly transmitted and absorbed solar energy that enters into

the building’s interior. The higher the SHGC, the higher the heat gain.

Light to Solar Gain Ratio (LSG)

The ratio is equal to the Visible Light Transmittance divided by the Solar Heat

Gain Coefficient. The Department of Energy’s Federal Technology Alert publica-

tion of the Federal Energy Management Program (FEMP) views an LSG of 1.25

or greater to be Green Glazing/Spectrally Selective Glazing.

European U-Value (formerly K-Value)

Based on ISO-DP10292 draft standard conditions. It is based on an outdoor

temperature of 5.5°C, an indoor temperature of 20.5°C and a 4.8 m/s outdoor

air velocity.

The solar and optical data presented in this guide is center-of-glass data based on the NationalFenestration Rating Council measurement standards. They were calculated using Lawrence BerkeleyNational Laboratory’s (LBNL) WINDOW 5.2 software. In some cases performance data changed incomparison to previous versions of LBNL’s WINDOW program.

A

BSHG of X

SHG of 1/8" CLSC =

Solar Heat Gain (SHG)

SHG = A + B

Figure 8

Shading Coefficient (SC)

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UNCOATED INSULATING GLASS (TABLE 1)

Product Transmittance Reflectance U-ValueShading

CoefficientRelative

Heat Gain SHGC*Visible Solar U-V Vis-Out Vis-In Solar Winter Summer

LSG*EuropeanU-Value

Clear 79% 61% 46% 14% 14% 11% .47 .49 .81 169 .70 1.13 2.8

Green 68% 39% 24% 11% 13% 7% .47 .49 .57 121 .49 1.39 2.8

Gray 41% 35% 19% 7% 12% 7% .47 .49 .55 117 .48 .85 2.8

Bronze 47% 38% 19% 8% 12% 7% .47 .49 .58 123 .50 .94 2.8

Blue 50% 37% 26% 8% 13% 7% .47 .49 .57 120 .49 1.02 2.8

Blue-Green 67% 40% 26% 12% 14% 8% .47 .49 .59 124 .51 1.31 2.8

UltraWhite™ 82% 76% 55% 14% 14% 13% .47 .49 .92 191 .80 1.02 2.8

CrystalGray™ 58% 43% 27% 10% 13% 8% .47 .49 .63 132 .54 1.07 2.8

PRODUCT CODES

*Detailed performance data is provided on the following pages for these substrates.

To view Viracon's complete product offering, including an expansion of high performance coatings and glass substrates, visit www.viracon.com.

VNE= Neutral Low-E 1 = Clear*

VRE = Radiant Low-E 2 = Green*

VE = Low-E 3 = Gray*

VS = Stainless Steel 4 = Bronze*

5 = Blue*

6 = Blue-Green*

7 = Azuria™

8 = EverGreen™

08 = 8%

14 = 14%

20 = 20%

30 = 30%

37 = 37%

38 = 38%

40 = 40%

42 = 42%

46 = 46%

52 = 52%

54 = 54%

55 = 55%

59 = 59%

63 = 63%

67 = 67%

85 = 85%

2M = 70%

*SHGC refers to Solar Heat Gain Coefficient

*LSG refers to Light to Solar Gain ratio

1. The performance data for Table 1 applies to insulating glass constructed with two plies (clear inboard) of 1/4" (6 mm) glass and a 1/2" (13 mm) air space. If UltraWhite™ (15) glass is used,both plies of the unit are the UltraWhite™ substrate.

Coating Type Outboard Glass Substrate Nominal Visible Light Transmittance of Coating

7

9 = Versalux® Blue 2000

10 = Versalux® Green 2000

11 = Arctic Blue™

12 = Atlantica™

13 = Starphire™

14 = Caribia™

15 = Guardian UltraWhite™*

19 = Guardian CrystalGray™*


1. The performance data in Table 2 applies to insulating glass constructed with two plies (clear inboard) of 1/4" (6 mm) glass and a 1/2" (13 mm) air space. The VNE coating is applied to the second(#2) surface. If UltraWhite™ (15) glass is used, both plies of the unit are the UltraWhite™ substrate.

2. If Viracon’s VNE coatings are applied to tinted glass, the glass must be heat treated.

3. If Viracon’s VNE coatings are applied to clear glass, contact our Technical Services Department at 800-533-2080 to determine the possibility of using annealed glass.

VIRACON VNE (NEUTRAL LOW-E) INSULATING GLASS (TABLE 2)


CoefficientRelative

Heat Gain SHGCVisible Solar U-V Vis-Out Vis-In Solar Winter Summer

LSGEuropeanU-Value

VNE1-37 37% 19% 13% 13% 10% 27% .30 .27 .28 61 .25 1.48 1.6

VNE1-63 62% 23% 4% 10% 11% 36% .29 .25 .32 67 .28 2.21 1.5

VNE2-37 31% 13% 6% 11% 10% 10% .30 .27 .24 51 .21 1.48 1.6

VNE2-63 52% 18% 2% 9% 11% 11% .29 .25 .29 61 .25 2.08 1.5

VNE3-37 19% 10% 6% 6% 9% 12% .30 .27 .20 44 .17 1.12 1.6

VNE3-63 31% 12% 2% 6% 10% 15% .29 .25 .21 47 .19 1.63 1.5

VNE4-37 22% 11% 5% 8% 9% 14% .30 .27 .22 47 .19 1.16 1.6

VNE4-63 37% 14% 2% 6% 10% 18% .29 .25 .23 50 .20 1.85 1.5

VNE5-37 23% 12% 7% 8% 9% 11% .30 .27 .22 48 .19 1.21 1.6

VNE5-63 39% 15% 2% 7% 10% 13% .29 .25 .25 53 .21 1.86 1.5

VNE6-37 32% 14% 7% 11% 10% 12% .30 .27 .25 53 .21 1.52 1.6

VNE6-63 53% 19% 3% 9% 11% 13% .29 .25 .29 62 .25 2.12 1.5

VNE15-37 39% 21% 15% 14% 9% 36% .30 .27 .29 63 .26 1.50 1.6

VNE15-63 65% 25% 5% 11% 11% 50% .29 .25 .32 67 .28 2.32 1.5

VNE19-37 27% 13% 8% 9% 9% 15% .30 .27 .24 51 .21 1.29 1.6

VNE19-63 46% 17% 3% 8% 11% 19% .29 .25 .27 57 .23 2.00 1.5

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VIRACON VRE (RADIANT LOW-E) INSULATING GLASS (TABLE 3)

VRE1-38 36% 18% 12% 44% 21% 46% .30 .26 .27 57 .23 1.56 1.6

VRE1-46 43% 23% 16% 34% 15% 40% .30 .27 .33 69 .28 1.54 1.6

VRE1-54 47% 25% 16% 32% 16% 37% .30 .27 .35 74 .31 1.52 1.6

VRE1-59 53% 28% 17% 30% 19% 38% .30 .27 .39 81 .33 1.61 1.6

VRE1-67 59% 32% 20% 29% 25% 35% .30 .27 .43 90 .38 1.55 1.6

VRE2-38 30% 13% 6% 32% 21% 19% .30 .26 .22 48 .19 1.58 1.6

VRE2-46 36% 16% 7% 25% 15% 16% .30 .27 .26 56 .23 1.56 1.6

VRE2-54 40% 17% 8% 24% 16% 15% .30 .27 .28 60 .24 1.67 1.6

VRE2-59 44% 19% 8% 23% 19% 15% .30 .27 .30 64 .26 1.69 1.6

VRE2-67 50% 21% 9% 22% 24% 15% .30 .27 .33 69 .28 1.79 1.6

VRE3-38 18% 10% 5% 14% 21% 17% .30 .26 .20 43 .17 1.06 1.6

VRE3-46 22% 12% 7% 12% 14% 15% .30 .27 .23 49 .20 1.10 1.6

VRE3-54 24% 14% 7% 11% 15% 15% .30 .27 .24 53 .21 1.14 1.6

VRE3-59 26% 15% 7% 11% 18% 15% .30 .27 .26 55 .22 1.18 1.6

VRE3-67 30% 17% 8% 10% 24% 14% .30 .27 .28 60 .24 1.25 1.6

VRE4-38 22% 11% 5% 19% 21% 22% .30 .26 .21 45 .18 1.22 1.6

VRE4-46 26% 14% 7% 15% 14% 19% .30 .27 .25 53 .21 1.24 1.6

VRE4-54 29% 16% 7% 14% 15% 18% .30 .27 .26 57 .23 1.26 1.6

VRE4-59 32% 17% 7% 14% 19% 18% .30 .27 .28 60 .24 1.33 1.6

VRE4-67 36% 20% 8% 13% 24% 17% .30 .27 .31 66 .27 1.33 1.6

VRE5-38 23% 11% 7% 20% 21% 18% .30 .26 .21 46 .18 1.28 1.6

VRE5-46 27% 14% 9% 16% 14% 16% .30 .27 .25 53 .21 1.29 1.6

VRE5-54 30% 16% 10% 15% 15% 15% .30 .27 .26 56 .23 1.30 1.6

VRE5-59 33% 17% 10% 15% 19% 15% .30 .27 .28 60 .24 1.37 1.6

VRE5-67 37% 19% 11% 14% 24% 15% .30 .27 .30 65 .26 1.42 1.6

VRE6-38 31% 14% 7% 33% 21% 22% .30 .26 .23 50 .20 1.55 1.6

VRE6-46 37% 17% 9% 26% 15% 18% .30 .27 .27 58 .23 1.61 1.6

VRE6-54 41% 19% 10% 24% 16% 18% .30 .27 .29 62 .25 1.64 1.6

VRE6-59 45% 20% 10% 23% 19% 17% .30 .27 .31 66 .27 1.67 1.6

VRE6-67 51% 23% 11% 23% 24% 17% .30 .27 .34 72 .30 1.70 1.6

VRE15-38 38% 22% 14% 46% 22% 59% .30 .26 .28 59 .24 1.58 1.6

VRE15-46 45% 27% 18% 35% 15% 51% .30 .27 .35 73 .30 1.50 1.6

VRE15-54 49% 29% 19% 33% 16% 51% .30 .27 .37 78 .32 1.53 1.6

VRE15-59 55% 33% 20% 31% 19% 49% .30 .27 .41 86 .36 1.53 1.6

VRE15-67 62% 38% 23% 30% 25% 45% .30 .27 .46 97 .40 1.55 1.6

VRE19-38 26% 13% 7% 26% 21% 25% .30 .26 .23 49 .20 1.30 1.6

VRE19-46 31% 17% 10% 20% 15% 22% .30 .27 .27 58 .23 1.35 1.6

VRE19-54 34% 18% 10% 19% 16% 20% .30 .27 .29 61 .25 1.36 1.6

VRE19-59 38% 20% 11% 18% 19% 21% .30 .27 .31 66 .27 1.41 1.6

VRE19-67 43% 23% 12% 18% 24% 19% .30 .27 .34 72 .30 1.43 1.6


CoefficientRelative


LSGEuropeanU-Value

9

1. The performance data in Table 3 applies to insulating glass constructed with two plies (clear inboard) of 1/4" (6 mm) glass and a 1/2" (13 mm) air space. The VRE coatings are applied to the second(#2) surface. If UltraWhite™ (15) glass is used, both plies of the unit are the UltraWhite™ substrate.

2. If Viracon’s VRE coatings are applied to tinted glass, the glass must be heat treated.

3. If Viracon’s VRE coatings are applied to clear glass, contact our Technical Services Department at 800-533-2080 to determine the possibilityof using annealed glass.


VIRACON VE (LOW-E) INSULATING GLASS (TABLE 4)

VE1-2M 70% 32% 10% 11% 12% 31% .29 .26 .44 91 .38 1.84 1.5VE1-85 76% 46% 26% 12% 13% 21% .31 .29 .63 129 .54 1.41 1.6VE1-55 47% 27% 13% 11% 16% 21% .31 .29 .40 84 .35 1.34 1.6VE1-52 50% 32% 21% 16% 11% 20% .32 .29 .46 96 .40 1.25 1.7VE1-42 37% 24% 16% 19% 14% 21% .31 .29 .36 77 .31 1.19 1.6VE1-40 36% 21% 10% 15% 19% 25% .31 .29 .32 68 .28 1.29 1.6VE2-2M 60% 24% 5% 9% 11% 10% .29 .26 .36 75 .31 1.93 1.5VE2-85 65% 31% 13% 10% 12% 9% .31 .29 .45 93 .39 1.67 1.6VE2-55 40% 18% 6% 10% 16% 9% .31 .29 .30 64 .26 1.54 1.6VE2-52 43% 21% 10% 12% 11% 9% .32 .29 .34 72 .29 1.48 1.7VE2-42 31% 15% 8% 15% 14% 10% .31 .29 .27 58 .23 1.35 1.6VE2-40 32% 14% 5% 12% 19% 10% .31 .29 .26 55 .22 1.45 1.6VE3-2M 35% 17% 4% 6% 9% 12% .29 .26 .28 59 .24 1.46 1.5VE3-85 38% 25% 11% 6% 10% 10% .31 .29 .38 81 .33 1.15 1.6VE3-55 23% 14% 5% 6% 15% 10% .31 .29 .26 57 .23 1.00 1.6VE3-52 25% 17% 8% 7% 10% 9% .32 .29 .29 63 .25 1.00 1.7VE3-42 19% 13% 7% 8% 13% 10% .31 .29 .25 53 .21 .90 1.6VE3-40 18% 11% 4% 7% 19% 11% .31 .29 .22 49 .19 .95 1.6VE4-2M 41% 20% 5% 7% 10% 15% .29 .26 .31 65 .26 1.58 1.5VE4-85 44% 28% 11% 7% 10% 11% .31 .29 .43 89 .37 1.19 1.6VE4-55 27% 17% 6% 7% 15% 12% .31 .29 .29 62 .25 1.08 1.6VE4-52 29% 19% 9% 8% 10% 10% .32 .29 .33 69 .28 1.04 1.7VE4-42 22% 15% 7% 10% 14% 11% .31 .29 .27 57 .23 .96 1.6VE4-40 22% 13% 4% 8% 19% 13% .31 .29 .24 52 .21 1.05 1.6VE5-2M 45% 21% 6% 7% 10% 12% .29 .26 .32 67 .28 1.61 1.5VE5-85 48% 28% 15% 8% 11% 9% .31 .29 .42 87 .36 1.33 1.6VE5-55 29% 16% 8% 7% 15% 9% .31 .29 .29 61 .25 1.16 1.6VE5-52 32% 19% 12% 9% 10% 10% .32 .29 .32 68 .28 1.14 1.7VE5-42 23% 14% 9% 10% 14% 10% .31 .29 .26 56 .23 1.00 1.6VE5-40 23% 12% 6% 9% 19% 10% .31 .29 .24 52 .20 1.15 1.6VE6-2M 60% 25% 6% 10% 11% 12% .29 .26 .36 76 .31 1.93 1.5VE6-85 65% 32% 15% 11% 12% 10% .31 .29 .46 97 .40 1.62 1.6VE6-55 40% 19% 7% 9% 15% 10% .31 .29 .32 67 .27 1.48 1.6VE6-52 42% 22% 12% 13% 11% 11% .32 .29 .35 73 .30 1.40 1.7VE6-42 32% 17% 9% 15% 14% 11% .31 .29 .29 61 .25 1.28 1.6VE6-40 31% 15% 6% 13% 19% 12% .31 .29 .26 56 .23 1.35 1.6VE15-2M 73% 37% 11% 11% 12% 42% .29 .26 .45 95 .39 1.87 1.5VE15-85 79% 56% 31% 12% 13% 27% .31 .29 .69 142 .60 1.32 1.6VE15-55 49% 33% 25% 12% 16% 28% .31 .29 .44 91 .38 1.29 1.6VE15-52 52% 39% 25% 16% 11% 25% .32 .29 .50 105 .44 1.18 1.7VE15-42 39% 29% 18% 20% 14% 26% .32 .30 .40 83 .34 1.15 1.6VE15-40 38% 25% 12% 16% 19% 33% .31 .29 .34 72 .29 1.31 1.6VE19-2M 51% 24% 6% 8% 11% 16% .29 .26 .35 73 .30 1.70 1.5VE19-85 55% 33% 16% 9% 12% 12% .31 .29 .48 99 .41 1.34 1.6VE19-55 34% 20% 8% 8% 16% 12% .31 .29 .32 68 .28 1.21 1.6VE19-52 36% 23% 13% 10% 11% 12% .32 .29 .36 76 .31 1.16 1.7VE19-42 27% 17% 10% 12% 14% 13% .32 .30 .29 53 .25 1.08 1.6VE19-40 27% 15% 6% 10% 19% 14% .31 .29 .26 56 .23 1.17 1.6


CoefficientRelative


LSGEuropeanU-Value

10

1. The performance data in Table 4 applies to insulating glass constructed with two plies (clear inboard) of 1/4" (6 mm) glass and a 1/2" (13 mm) air space. The VE coatings are applied to the second(#2) surface. If UltraWhite™ (15) glass is used, both plies of the unit are the UltraWhite™ substrate.

2. If Viracon’s VE-85 coatings are applied to tinted glass, contact our Technical Services Department at 800-533-2080 to determine the possibility of using annealed glass.

3. If Viracon’s VE-55, VE-52, VE-42 and VE-40 coatings are applied to clear glass, contact our Technical Services Department at 800-533-2080 to determinethe possibility of using annealed glass.

4. If VE-2M, VE-55, VE-52, VE-42, VE-40 coatings are applied to tinted glass, the glass must be heat treated.

5. Our Technical Services Department can also provide performance information on products not listed here.


11

VS1-08 8% 5% 3% 42% 38% 34% .38 .39 .16 37 .13 .61 2.2

VS1-14 12% 9% 6% 32% 38% 27% .40 .41 .21 47 .18 .67 2.3

VS1-20 18% 12% 8% 24% 34% 21% .42 .43 .27 59 .23 .78 2.4

VS1-30 26% 18% 12% 15% 30% 14% .44 .45 .35 76 .30 .87 2.6

VS1-40 36% 26% 17% 11% 25% 10% .45 .47 .44 94 .38 .95 2.7

VS2-08 6% 3% 1% 31% 38% 16% .38 .39 .16 37 .13 .46 2.2

VS2-14 10% 5% 3% 25% 38% 14% .40 .41 .19 44 .16 .62 2.3

VS2-20 15% 8% 4% 18% 34% 11% .42 .43 .23 52 .20 .75 2.4

VS2-30 22% 11% 6% 12% 30% 8% .44 .45 .28 62 .24 .92 2.6

VS2-40 30% 16% 8% 9% 25% 6% .45 .47 .33 73 .29 1.03 2.7

VS3-08 4% 3% 1% 14% 38% 15% .38 .39 .16 37 .14 .29 2.2

VS3-14 6% 5% 3% 12% 38% 13% .40 .41 .19 44 .16 .37 2.3

VS3-20 9% 7% 4% 10% 33% 11% .42 .43 .23 52 .20 .45 2.4

VS3-30 13% 10% 5% 7% 29% 7% .44 .45 .27 61 .23 .56 2.6

VS3-40 18% 14% 7% 6% 25% 6% .45 .47 .32 71 .27 .67 2.7

VS4-08 4% 3% 1% 17% 38% 16% .38 .39 .16 38 .14 .29 2.2

VS4-14 7% 5% 2% 14% 38% 13% .40 .41 .19 45 .17 .41 2.3

VS4-20 11% 8% 3% 11% 33% 11% .42 .43 .23 52 .20 .55 2.4

VS4-30 16% 12% 5% 8% 30% 8% .44 .45 .29 64 .25 .64 2.6

VS4-40 21% 16% 7% 6% 25% 6% .45 .47 .34 75 .29 .72 2.7

VS5-08 5% 3% 2% 19% 38% 14% .38 .39 .16 37 .14 .36 2.2

VS5-14 8% 5% 3% 15% 38% 12% .40 .41 .19 44 .16 .50 2.3

VS5-20 11% 7% 4% 12% 33% 10% .42 .43 .23 51 .19 .58 2.4

VS5-30 16% 11% 7% 9% 30% 8% .44 .45 .28 62 .24 .67 2.6

VS5-40 22% 15% 9% 7% 25% 6% .45 .47 .33 72 .28 .79 2.7

VS6-08 6% 3% 2% 31% 38% 18% .38 .39 .16 37 .14 .43 2.2

VS6-14 10% 6% 3% 25% 38% 15% .40 .41 .19 45 .17 .59 2.3

VS6-20 15% 8% 4% 19% 34% 12% .42 .43 .23 53 .20 .75 2.4

VS6-30 23% 13% 7% 12% 29% 8% .44 .45 .30 66 .26 .88 2.6

VS6-40 30% 17% 9% 9% 25% 7% .45 .47 .35 76 .30 1.00 2.7

VS15-08 8% 7% 2% 43% 39% 43% .38 .39 .15 36 .13 .61 2.2

VS15-14 13% 11% 4% 34% 39% 34% .40 .41 .22 49 .19 .68 2.3

VS15-20 19% 16% 6% 25% 34% 27% .42 .43 .28 62 .24 .79 2.4

VS15-30 27% 24% 9% 16% 30% 17% .44 .45 .39 83 .33 .82 2.6

VS15-40 37% 34% 12% 11% 26% 11% .45 .47 .49 105 .43 .86 2.7

VS19-08 6% 2% 4% 24% 38% 19% .38 .39 .16 37 .14 .43 2.2

VS19-14 9% 6% 3% 19% 38% 15% .40 .41 .20 45 .17 .53 2.3

VS19-20 13% 9% 5% 15% 33% 12% .42 .43 .24 54 .21 .62 2.4

VS19-30 19% 13% 7% 10% 30% 9% .44 .45 .30 66 .26 .73 2.6

VS19-40 26% 18% 10% 7% 25% 7% .45 .47 .36 71 .31 .84 2.7


CoefficientRelative


LSGEuropeanU-Value

VIRACON VS (STAINLESS STEEL) REFLECTIVE INSULATING GLASS (TABLE 5)

1. The performance data in Table 5 applies to insulating glass constructed with two plies (clear inboard) of 1/4" (6 mm) glass and a 1/2" (13 mm) air space. The VS coatings are applied to the second(#2) surface. If UltraWhite™ (15) glass is used, both plies of the unit are the UltraWhite™ substrate.

2. If Viracon’s reflective coatings are applied to tinted glass, the glass must be heat treated.

3. If Viracon’s reflective coatings are applied to clear glass, contact our Technical Services Department at 800-533-2080 to determine the possibilityof using annealed glass.


12

technical information

Glazing Guidelines

Viracon requires that only 100% silicone setting blocks be used for all types of

glazing systems. The blocks should have a durameter hardness of 85±5. They

should also be centered at quarter points and be 1/16" (1.6 mm) less than the

channel width (see Figure 9).

Lockstrip gasket systems also require setting blocks. For additional

recommendations, contact the appropriate gasket manufacturer.

Inadequate edge clearances can cause glass breakage as a result of glass-

to-frame contact. Viracon recommends a minimum face clearance of 3/16"

(5 mm), a minimum edge clearance of 1/4"(6 mm) and a minimum glass bite

of 1/2" (13 mm) (see Figure 10).

Weep System

Do not expose the edges of laminated, insulating and opacifier film glass to

standing water. This can cause premature seal failure or delamination. Viracon

requires either impervious weather seals or an adequate weep system to

prevent this from occurring (see Figure 11). This is also true of lockstrip

gasket glazing.

The glazing system manufacturer or designer is ultimately responsible for the

design of the weep system and its proper performance.

Structural Silicone Glazing

Structural silicone glazing systems use silicone sealants with an interior

backup mullion. It must be specified as a structural silicone glazing system

due to compatibility limitations of silicone sealants with certain types of glass

or insulating unit secondary seals. To obtain approval for any structural

silicone glazing system, contact the appropriate silicone manufacturer or

Viracon’s Technical Services Department.

Gray Silicone/PIB (Polyisobutylene)

Viracon offers Gray silicone/PIB in addition to standard Black silicone/PIB

sealant. Both colors of sealant are the same Dow Corning 982 structural

silicone used by Viracon for the past 20 years. Therefore, the structural

performance and long-term durability expected of the primary and secondary

seal of our insulating glass unit remains the same.

The Gray silicone/PIB dual seal construction has certain inherent visual

characteristics that are not readily apparent with a Black silicone/PIB dual seal

construction. These include the following:

• Gray color variation. Given the inherent variation in compounding both

silicone and PIB by suppliers, visual differences may occur.

• Color match between silicone and PIB. While every effort is made to

match these visually, the compounding variation mentioned above

precludes a perfect match. Additionally, a slight contrast in color is

required in order to identify any sealant inconsistencies.

• Black specks within the silicone and PIB. These are due to the existence

of carbon black in the sealant manufacturing process.

• Dark lines or streaks in the silicone. These may occur as a result of

the edge deletion process used to remove certain coatings around the

perimeter glass edge. With black silicone/PIB these are not visible;

however, with the light gray color they may be visible when viewed

from close distances.

None of these inherent product characteristics would be considered cause

for rejection.

Glass Handling and Storage

Care needs to be taken during handling and glazing to ensure that glass

damage does not occur. Do not allow glass edges to contact the frame or any

hard surface during installation. Use rolling blocks if the insulating units are

W/4 W/4

85 ± 5 Shore A Durometer Blockscentered at 1/4 points with length

dependent upon glass area.Weep System

(3/8" DiameterHoles)

Bite

Edge

Face

DenseWedgeGasket

Closed-Cell NeopreneGasket

Weep

Typical Glazing Detail

Clearance, Bite andDimensional Tolerances

Setting Block LocationWeep Hole Location

Figure 9

Figure 10

Figure 11

The “W” indicates width of glass ply unit


PRODUCT STANDARDS

13

RECOMMENDED CLEARANCES

Edge Clearance

1/4"(6 mm)

Face Clearance

3/16"(5 mm)

Glass Bite

1/2"(13 mm)

Dimensional Tolerance

+3/16"/ -1/16"(+4.8 mm / -1.6mm)

Thickness Tolerance

+1/32"/ -1/16"(+.8 mm / -1.6mm)

Glass Thickness

1" (25 mm) unitwith 1/4"(6 mm) glass

rotated or “cartwheeled” on their corners. To see an example of a rolling

block, refer to the Glass Association of North America (GANA) glazing manual.

Improper glass storage techniques may result in damage to glass components,

glass surfaces, coatings or glass breakage. Store glass crates properly to pre-

vent them from tipping. Also, ensure proper blocking and protection from

outside elements.

Viracon recommends a 5-7° lean against two wide, sturdy uprights, which are

capable of withstanding crate weight.

Once the glass is installed, the architect, general contractor or building owner

should provide for glass protection and cleaning. Weathering metals, alkaline

materials or abrasive cleaners may cause surface damage. Windblown objects,

welding sparks or other material that contacts the glass surface during

construction may cause irreversible damage.

Maintenance and Cleaning

To maintain aesthetics, it is important to clean the glass during and after

construction. For routine cleaning, use a soft, clean, grit-free cloth and a mild

soap, detergent, or window cleaning solution.

Rinse immediately with clean water and remove any excess water from the

glass surface with a squeegee. Do not allow any metal or hard parts of the

cleaning equipment to contact the glass surface.

Take special care cleaning coated reflective glass surfaces. Do not use abrasive

cleaners, razor blades, putty knives and metal parts of cleaning equipment,

since these will scratch the reflective coating. Fingerprints, grease, smears,

dirt, scum and sealant residue are more noticeable on reflective glass,

requiring more frequent cleaning. Follow the same cleaning techniques

used for non-reflective glass.

Glass Breakage

It is important to first determine appropriate loads for the glass. Viracon

can supply architects with glass strength analyses on specified products.

“Unexplained” glass breakage may still occur due to thermal stress, glazing

system pressures, glazing damage, handling and storage conditions, excessive

wind loads, objects and debris striking the glass, improper factory fabrication

or damage by persons or objects at the construction site.

Framing Deflections

Refer to the GANA glazing manual for information on adequate framing

systems. You are required to comply with industry standards for framing

deflection. It must not exceed either the length of the span divided by 175

or 3/4" (19 mm), whichever is less.

Non-Rectangular Glass Shapes

Viracon’s capabilities include cutting virtually any shape glass required for your

project without full-size patterns. However, if you require a full-size pattern, it

must be submitted to Viracon on mylar material. If not, Viracon will transfer

the pattern to mylar at an additional charge. However, Viracon will not be

responsible for size accuracy. For additional information, contact Viracon’s

Inside Sales Department.

Suggested Specifications

You can specify Viracon products, using the MASTERSPEC® Basic Section

“Glass and Glazing” or the MASTERSPEC Supplemental Section “Decorative

Glazing” software.

MASTERSPEC is a comprehensive and unbiased master specification system

produced and distributed by the American Institute of Architects (AIA) on a

licensed user basis. For further information, call 800-424-5080.

Warranty Information

Viracon’s architectural products carry limited warranties. Contact our Inside

Sales Department for copies of our product warranties.

PRODUCT STANDARDS

Uncoated Insulating Glass

Minimum Size Standard Maximum Size

Annealed:

8" x 18" 84" x 144"

(203 mm x 457 mm) (2134 mm x 3658 mm)

Heat processed:

12" x 12" 84" x 144"

(305 mm x 305 mm) (2134 mm x 3658 mm)

Premium over-sized maximum: 84" x 165" (2134 mm x 4191 mm) or 96" x 144"

(2438 mm x 3658 mm). Premium over-sized maximum for silk-screened glass

and for heat-soaked glass is 84" x 165" (2134 mm x 4191 mm). A technical

review is required for all over-sized requests.

1. Viracon’s architectural insulating glass units have been CBA rated with

the Insulating Glass Certification Council (IGCC) in accordance with

ASTM Specifications E-773 and E-774. ASTM E 2190 now supercedes

ASTM E-773 and E-774. In 2005 IGCC has begun certifying insulating

glass to ASTM E 2190. Viracon’s insulating glass will now be IGCC

certified to ASTM E 2190.

2. In some cases, Viracon’s insulating glass may require heat processing. Refer

to heat processing comments on page 14 for further product information.

Viracon High-Performance Reflective and Low-E Coated

Insulating Glass


Annealed:

8" x 18" 84" x 144"

(203 mm x 457 mm) (2134 mm x 3658 mm)

Heat processed:

12" x 36" 84" x 144"

(305 mm x 914 mm) (2134 mm x 3658 mm)

The maximum size for Viracon’s VNE63 coating is 72” x 144”. The maximum size

for the VNE37 coating is 84” x 144”.

Premium over-sized maximum: 84" x 165" (2134 mm x 4191 mm) or 96" x 144"

(2438 mm x 3658 mm). Premium over-sized maximum for silk-screened glass

and for heat-soaked glass is 84" x 165" (2134 mm x 4191 mm). A technical


1. In some cases, insulating glass units may require heat processing. Refer

to heat processing comments on page 14 for further product information.

*Detailed performance data is provided on the following pages for these substrates.

To view Viracon’s complete product offering, including an expansion of high performance coatings and glass substrates, visit www.viracon.com


14

2. Coated Glass Inspection Guidelines. Viracon’s coated glass products

comply with ASTM Standard C 1376.

• Pinholes— Inspect glass from a distance of 10 ft. (3 m) in transmission,

at a viewing angle of 90° to the specimen, against a bright uniform

background. If a pinhole is readily apparent, the following criteria apply:

Pinholes larger than 1/16" (1.6 mm) in diameter are not allowed in 80

percent of the central glass area. Pinholes larger than 3/32" (2.4 mm)

are not allowed in the outer 20 percent of the glass area. No more than

two readily apparent blemishes are allowed in a 3" (75 mm) diameter

circle and no more than five readily apparent blemishes are allowed in

a 12" (300 mm) diameter circle.

• Uniformity—When viewing coated glass from a minimum distance of

10 ft. (3 m), color variation may occur from one unit to another. This

can be caused by variations within the float glass substrate and normal

production variations, and this is not considered a defect. All Viracon

commercial glass products conform to industry color standards.

• Distortion—Various factors involved in heat processing, insulating air

spacers and frame binding may distort reflected objects viewed on the

glass surface. These are not considered defects of the coated glass or

the final fabricated product.

• Scratches—Inspect glass from a distance of 10 ft. (3 m). Scratches up to

2" (50 mm) are allowed in 80 percent central glass area, and scratches

up to 3" (75 mm) are allowed in the outer area. Concentrated scratches

or abraded areas are not allowed.

Viracon Insulating Spandrel Glass


12" x 36" 84" x 144"

(305 mm x 914 mm) (2134 mm x 3658 mm)

Premium over-sized maximum: 84" x 165" (2134 mm x 4191 mm). A technical


1. Viracon designs its spandrel glass for glazing against a uniform, opaque

background. We do not recommend its use in transoms, partitions or

other areas where a uniform, opaque background is unavailable.

2. Reflective Spandrel Glass Inspection Guidelines

• View spandrel glass from a distance of 15 ft. (4.6 m) under natural

daylight conditions. Color and reflectance may vary when viewed under

a uniform, opaque background. This is not considered a defect.

• When viewing spandrel glass under similar conditions, reflected pinholes

and scratches are not considered defects if they are unobtrusive.

Viraspan™ for Uncoated Insulating Glass


12" x 12" 84" x 144"

(305 mm x 305 mm) (2134 mm x 3658 mm)

Premium over-sized maximum: 84" x 165" (2134 mm x 4191 mm). A technical


1. Viracon designs its spandrel glass for glazing against a uniform, opaque

background. We do not recommend its use in transoms, partitions or

other areas where a uniform, opaque background is unavailable.

2. Viraspan Spandrel Glass Inspection Guidelines

• View spandrel glass from a distance of 15 ft. (4.6 m) under natural

daylight conditions. Color and reflectance may vary when viewed under

a uniform, opaque background. This is not considered a defect.

• When viewing spandrel glass under similar conditions, reflected pinholes

and scratches are not considered defects if they are unobtrusive.

3. You can use Viraspan in structurally glazed applications. However,

a clear edge may be visible. Contact Viracon’s Architectural Inside Sales

Department for more information.

4. Viracon reserves the right to change substrate glass suppliers. As a result,

this may affect perceived colors of our Viraspan samples. Approval of all

glass colors is based on 12" x 12" (305 mm x 305 mm) samples, which

are ordered for each project.

Heat-Processed Glass (Heat Strengthened and Tempered)

1. Glass cutting and fabrication is completed prior to heat processing.

2. Viracon’s two types of heat-processed glass comply with ASTM Standard

C1048. Surface compression of heat-strengthened glass with thicknesses

of 1/4" (6 mm) and less is 4,000-7,000 psi. Surface compression for 5/16"

(8 mm) and 3/8" (10 mm) heat-strengthened glass is 5,000-8,000 psi.*

For fully-tempered glass, the minimum surface compression is 10,000 psi.

It also complies with ANSI Z97.1 and CPSC 16 CFR 1201 safety glazing

standards.

*Because of reader repeatability and instrument tolerances, Viracon’s toler-

ance for heat-strengthened glass surface compression is +/- 1,000 psi.

Note: The maximum sizes listed are shown to illustrate pro-

duction limits. These sizes are unavailable as finished products.

Maximum piece size for annealed glass under any condition

is 50 sq. ft. (4.65 sq.m.) Maximum size for heat-treated glass

under any condition is 65 sq. ft. (6.04 sq.m.) Maximum unit

weight is 750 pounds (340 kg). The premium over-weight

maximum is 2000 pounds (907 kg). A technical review is

required for all over-weight requests.

For complete information on all of Viracon products including: insulating,

silk-screened, spandrel, laminated, protective, monolithic and acoustical

glass, visit www.viracon.com, or contact us at [email protected] or by

calling 800-533-2080.

CONTINUING EDUCATIONWe also work with professional organizationsand firms worldwide to provide AIA registerededucational seminars. As a registered provider

with the AIA/Continuing Education System (AIA/CES), archi-tects can receive 1.5 continuing learning units (LU’s) withAIA/CES, including health, safety and welfare credits. Visitour website for a complete listing of available educationalseminars and to schedule a presentation, or contact usat 800-533-2080.


800 Park Drive, Owatonna, MN 55060507.451.9555 800.533.2080 (Toll Free)507.444.3555 FAX (Within U.S.A.) 507.451.2178 FAX (Outside U.S.A.)E-Mail: [email protected] Internet address: http://www.viracon.com

This publication describes Viracon’s architectural insulating glass products

to help you analyze possible design options and applications. To obtain

warranty information, contact Viracon’s Architectural Inside Sales or

Technical Services Department.

The information contained in this publication is presented in good faith.

It is believed to be accurate at the time of publication. Viracon reserves

the right to change product specifications without notice and without

incurring obligation.

Viraspan and Viraconsulting are registered trademarks of Viracon.Azuria, Atlantica, Starphire and Caribia are trademarks of PPG Industries, Inc.EverGreen and Arctic Blue are trademarks of Pilkington.UltraWhite and CrystalGray are trademarks of Guardian Industries Corp.

Versalux is a registered trademark of ACH.MASTERSPEC is a registered trademark of the American Institute of Architects.

© 2008 Viracon. All rights reserved.VSG-004L MOJOJC0208


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