KnowledgeSeminarSeries:HighPerformanceGlass

October18,2017

JimLarsenDirector,TechnologyMarketing

CardinalGlassDivisions

• FG:flatglass• TG:tempered(safety)glass• CG:coatedglass(low-E)• LG:laminatedglass(safety&hurricane)• IG:insulatingglass(2and3paneunits)

WinnipegGlassDesignPriorities

• Coldweather:DesignforlowU-Factor– Reduceheatloss– Warmerglasssurfaceatwinternight

• WintersunonSouthelevation– Potentialforpassivedesign

• SummersunonEast&Westelevations– Bewarediscomfortduetooverheat

5 months below freezing

5 months below freezing

Low-Eunitsarewarmonwinternight. Clearglassiscool.

WinterSun:8hoursofDaylight

SummerSun:16hoursofDaylight

Highsolargainlow-Eishotinsunlight

EnergyTerms

• U-Factor(heatloss)

• SHGC:SolarHeatGainCoefficient

• VT:VisibleLightTransmission– Aesthetic(clarity,color)– Daylightingenergymostlyincommercial

TraditionalEnergySolutionsforWindows

1. Addlayerstoinsulateglass– Single,double,triple,etc.

2. Changeframematerial– Metal,thermalbreak,wood/vinyl/fiberglass– Addwarm-edgespacer

3. Addtintedorreflectiveglass– Absorbsunlightwithtintedglass– Rejectwithreflectiveglass

TheRuleofPanes

Eachlayerofglassinamulti-paneunitaddsapproximately1“R”totheinsulatingvalue

(Inch-PoundR-Value)

Low-Ecoatingsandgasfillsdisplacelayersofglass

LotsofPanes

SinglePane ~R1DoublePane ~R2TriplePane ~R3QuadPane ~R4………

“Octo-Pane” ~R8

“R2”Glass

WindowU~0.50(2.8)

“R4”Glass

WindowU~0.35(2.0)

Less“Pain”withLow-E

• SinglePane ~R1• DoublePane ~R2• TriplePane ~R3• QuadPane ~R4

• 2Pane+Low-E ~R3• 2P+Low-E+Argon ~R4

MoreLow-EandMorePanes

• SinglePane ~R1• DoublePane ~R2• TriplePane ~R3• QuadPane ~R4

• 2Pane+Low-E ~R3• 2P+Low-E+Argon ~R4

• Triplew/2Low-E+Argon ~R8

Non-MetalWindowU~0.30(1.7)

2Pane+WarmEdge+Low-E+Argon

TraditionalOptionsforSolarControlGlass

Tinted– Addscolorto“body”ofglass– Absorbssunlightandre-radiatestoexterior

Reflective– Mirrorappearance– Reflectssunlightout

ClearGlassWindowSHGC

~0.60

WindowSHGC

TheSolarSpectrum

45%3% 52%

2PClear:WindowSHGC~0.6

2PTinted:WindowSHGC0.4– 0.5

ANewOptionforSolarControlGlass

Tinted– Addscolorto“body”ofglass– Absorbssunlightandre-radiatestoexterior

Reflective– Mirrorappearance– Reflectssunlightout

SpectrallySelectiveLow-E– Clearglassappearancewithsolarcontrol– Reflectssolarinfrared(invisibletohumaneye)

HighSolarGainLow-E:WindowSHGC~0.5

MediumSolarGainLow-E:WindowSHGC~0.3

|Low-E|ClearGlassMedSolar|HighSolar

LowSolarGainLow-E:WindowSHGC~0.2

DualPaneInsulatingGlass

HighSolarGainLow-EonSurface3=HotinSunlight!

TriplePaneInsulatingGlass

TriplePaneCoatingRecommendations

• Avoidlow-Eoncenterpane(#3or#4)

• Usehighsolargainlow-Eon#5forbestvisiblecharacteristicsandloweredriskofthermalstressbreakage

• SelectHigh,Medium,orLow solargainlow-Efor#2surface(orientationspecific)

Thankyou!

Anyquestions?