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glass performance

Choosing the correct glass

All performance for C.O.G. (centre of glass) ratings are based on Vision v4.0 simulations. All C.O.G U- and R-values are based on ASHREA Winter Conditions. Framing, cladding, frame type and other items will affect the overall thermal values of a complete window.

View Chart
Glass Series Heat System Description METRIC* IMPERIAL* SHGC Visible Light Ultraviolet Block
U-Value R-Value U-Value R-Value
Dual Clear Dual (clear/clear) no argon 2.725 0.367 0.480 2.083 0.760 81% 42%
Triple Clear Triple (clear/clear/clear) no argon 1.760 0.568 0.310 3.226 0.685 74% 52%
ComfortGain180
ComfortGain180 Best for homes where passive solar heat is a benefit and you want to feel the sun's warmth indoors
HS1 Dual (clear/180) with argon 1.476 0.678 0.260 3.846 0.686 79% 71%
HS1V Dual (180/i89) with argon 1.187 0.843 0.209 4.785 0.623 77% 73%
HS2 Triple (clear/clear/180) with argon 1.045 0.957 0.184 5.435 0.615 73% 76%
HS3 Triple (180/clear/180) with argon 0.755 1.325 0.133 7.519 0.561 70% 87%
ComfortPlus270
ComfortPlus270 Best for mixed climates that demand better solar heat control and improved insulation
HS4 Dual (270/clear) with argon 1.408 0.710 0.247 4.032 0.367 70% 86%
HS4V Dual (270/i89) with argon 1.136 0.881 0.200 5.000 0.360 68% 86%
HS5 Triple (270/clear/clear) with argon 1.056 0.947 0.185 5.376 0.339 64% 88%
HS6 Triple (270/clear/270) with argon 0.704 1.420 0.124 8.065 0.311 55% 96%
ComfortMax366
ComfortMax366 Best for overall maximum performance—lowest solar heat gain, highest insulation, and the best UV protection
HS7 Dual (366/clear) with argon 1.368 0.731 0.241 4.149 0.272 65% 95%
HS7V Dual (366/i89) with argon 1.108 0.903 0.195 5.128 0.267 63% 95%
HS8 Triple (366/clear/clear) with argon 1.031 0.970 0.182 5.495 0.251 59% 96%
HS9 Triple (366/clear/180) with argon 0.721 1.387 0.127 7.874 0.244 57% 98%
HS9V Triple (366/180/i89) with argon 0.635 1.575 0.112 8.929 0.236 56% 98%
HS10 Triple (366/clear/366) with argon 0.677 1.477 0.119 8.403 0.236 47% 99%

Notes
Values are in METRIC. All performance for C.O.G. (centre of glass) ratings are based on Vision v4.0 simulations. All C.O.G U- and R-values are based on ASHREA Winter Conditions. Framing, cladding, frame type and other items will affect the overall thermal values of a complete window.

U Value: the total heat transfer out of a window (Btu/hr-sq ft-F or W/sq m- C). The lower the number the better the glass. 

R-Value: the amount of heat retained by the window. The higher the number the better the glass.

Solar Heat Gain Coefficient: the amount of solar radiation which enters the house through radiation. This is expressed as a dimensionless number between 0 and 1. It represents the heat gain through 3mm clear glass.

Visible Light Transmittance: measures how much of the visible light is entering the building through the glass. 1.0 would mean all of the light was getting through and 0 would mean none of it was getting through. Our atmosphere naturally filters out 5% of the visible light. Clear glass with no coatings lets in approx. 90% of visible light.

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  • 01 | Series
  • 02 | Shape
  • 03 | Type
  • 04 | Glass
  • 05 | Grilles
  • Complete all the tabs to obtain a result.

Select a Series
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For more information, please refer to the Glass Performance chart below this section.
Blinds Triple HS1 HS1V HS2 HS3 HS4 HS4V HS5 HS6 HS7 HS7V HS8 HS9 HS9V HS10

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No Grille Over Or Equal 1 Inch Grille Over Or Equal 1 Inch SDL Under 1 Inch Grille Under 1 Inch SDL

Selected Options:

  1. Series:
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Result

  • U-value
    Metric
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  • U-value
    Imperial
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  • Solar Heat
    Gain-Coefficient
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  • Visible Light
    Transmission
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  • Energy
    Rating
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  • Energy Star®
    2020
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  • Energy Star®
    2020 Most Efficient
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  • Meets NBC
    9.36 Code
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  • Meets BCBC
    9.36 Code Zones
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