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PRODUCTS / WINDOWS / GLASS
CHOOSE YOUR GLASS
Good design and correct installation are important factors
in ensuring energy efficient windows, but glass performance
plays the biggest role.
Different glass options have different benefits, so before choosing your glass, be sure
to consider the weather conditions of where you live. Colder climates will require more
insulation power and specific glass coatings to improve energy efficiency.
GLASS OPTION RATINGS
GLASS NAME HEAT SYSTEM DESCRIPTION U-VALUE* U-VALUE† R-VALUE* R-VALUE† SHGC† VISIBLE LIGHT UV BLOCK
CLEAR DUAL Dual pane, clear glass, no coatings 2.725 0.480 0.367 2.083 0.760 81% 42%
TRI Triple pane, clear glass, no coatings 1.760 0.310 0.568 3.226 0.685 74% 52%
HS1-C180 Dual pane, one Low-E coating, Argon 1.476 0.260 0.678 3.846 0.685 79% 71%
LOW-E HS2-C180 Triple pane, one Low-E coating, Argon 1.045 0.184 0.957 5.434 0.615 73% 76%
HS3-C180 Triple pane, two Low-E coatings, Argon 0.755 0.133 1.325 7.518 0.560 70% 87%
SYSTEM V SUNSTOP HS4-C270 Dual pane, one SunStop coating, Argon 1.408 0.248 0.710 4.032 0.367 70% 86%
HS5-C270 Triple pane, one SunStop coating, Argon 1.056 0.186 0.947 5.376 0.338 63% 88%
HS6-C270 Triple pane, two SunStop coatings, Argon 0.704 0.124 1.420 8.064 0.310 54% 96%
HS1V Dual pane, two Low-E coatings, Argon 1.187 0.209 0.842 4.783 0.623 77% 73%
HS4V Dual pane, one Low-E & one SunStop coating, Argon 1.136 0.200 0.880 4.998 0.361 69% 86%
*D enotes Metric and †denotes Imperial. Values are R-Value: A measurement of the resistance of heat transfer through glass. The
from centre of glass. Rating may vary by product higher the R-Value, the better the window insulates against heat.
line. See your sales representative for more details.
All performance is C.O.G. (centre of glass) ratings Solar Heat Gain: The amount of the sun’s heat that transfers through glass from the
based on Vision v4.0 simulations. All C.O.G R-values exterior to the interior side. The higher the solar heat gain, the more a window allows
are based on ASHREA Winter Conditions. heat to pass through into a home.
10 U-Value: A measure of the rate of nonsolar heat flow through a material or assembly.
The lower the U-Value, the greater a window’s resistance to heat flow and the better
its insulating value.