When the temperature soars, ordinary window glass just can’t handle the heat. And tinted glass spoils the view. Cardinal LoĒ³-366, however, has been specially formulated to reject the sun’s heat without affecting the view. It lets more light in and keeps more heat out. So your home stays cool and comfortable. Our patented LoĒ³-366 coating provides the ultimate in performance of all our LoĒ products.
What’s more, LoĒ³-366 provides exceptional fading protection as well. It blocks 95% of the sun’s damaging ultraviolet rays (a leading cause of fading), so it will help your furniture, carpets, curtains and wall coverings stay beautiful for years to come.
Cardinal LoĒ³-366® glass is the ultimate performance glass. It just might make all other low-e glass obsolete. LoĒ³-366 delivers the ideal balance of solar control and high visibility. And it provides the highest levels of year-round comfort and energy savings.
It’s the perfect cold remedy, too. During cold weather, the insulating effect of your windows has a direct impact on how your rooms feel. Typically, 75% of the exposed surface of a window is glass, and the temperature of the room-side of the glass directly affects the air temperature in the room. The better insulated the window glass, the warmer your room will be.
Inside glass and outside temperatures.
The table below compares the room-side center of glass temperatures of different glass types against two different winter conditions.
The superior insulating capability of Cardinal LoĒ³-366 is a key factor in the construction of comfortable windows for cold climates. The dramatic comfort improvement from windows with warm glass surfaces also means the relative humidity of the indoor air can be controlled and maintained properly. Proper humidity levels (not too much, not too little) will improve comfort and promote a healthier living environment.
Three layers of silver make the clear difference.
For years, Cardinal has been setting the standard for energy efficient glass. Top-of-the-line residential window and door manufacturers all rely on our high quality. Our patented state-of-the-art sputter coating processes are unmatched by any other glass manufacturer. Now we’ve raised the bar. LoĒ³-366 adds a third layer of silver coating. Result: a clear coating that blocks even more solar gain, reflects heat, and lets the light stream in. LoĒ³-366 actually outperforms the tinted glass often used in warm climates.
You’re always in season with LoĒ³-366 glass.
LoĒ³-366 is the ultimate performance glass, with energy savings throughout the year, in every part of the country. All with exceptional visibility. It’s the perfect glass wherever you live.
Opague Glass Options
Unprecedented Solar Performance.
The solar performance of our new LoĒ³-340 glass is unprecedented in a double-pane unit – no room-darkening tint required. With its SHGC of just 0.18, it greatly reduces oppressive solar heat gain. And wherever glare is a problem, LoĒ³-340 controls that as well. Then when cold weather rolls around, its low U-Factor reduces indoor heat loss.
Result? Year around comfort.
The best solar control glass under the sun.
When it comes to reducing solar heat gain from the blazing sun, LoĒ³-340 simply has no equal. And because it’s not tinted, you enjoy a number of other advantages as well. First, there’s the cost savings of no tint. Then you avoid the disadvantages of tinting: the potential for thermal stress breakage and the potential need to heat treat the glass.
Tinted glass has several other glaring deficiencies. Regular tinted glass works by absorbing sunlight, so the glass becomes hot in the sun. The color of the glass also changes with its thickness. On the other hand, LoĒ³-340’s appearance and performance remain the same regardless of glass thickness.
What's more, LoĒ³-340 has a very high LSG (light to solar gain ratio) of 2.17. So even though solar gain is being controlled, plenty of visible light is still allowed inside. (NOTE: LSG based on 340/clear with 3mm glass thickness.)
LoĒ³-340: spectrally selective glass.
What makes multi-layer LoĒ³-340 different is its ability to handle each portion of the solar spectrum differently. This graph compares the solar transmission of clear glass, bronze tinted glass and LoĒ³-340. Clear glass allows nearly all the solar energy through. Bronze glass reduces transmission by absorbing sunlight, but it’s more effective at blocking light than heat. To match the glare control of LoĒ³-340, a tinted glass would have to be 1/4″ thick.
Even at this heavy thickness, the solar blockage of tinted glass doesn’t compare with LoĒ³-340. The LoĒ³-340 plot demonstrates the “selective” nature of the coating. Visible Light Transmittance is more than twice the Solar Heat Gain Coefficient. As a result, LoĒ³-340 provides effective glare control and maximum solar blockage in a softly tinted design – without the punishing discomfort of heat-absorbing glass or the visual disruption of highly reflective glass.
Enjoy all season comfort.
Year-round thermal comfort is mainly the result of two things: Blocking oppressive solar heat gain in hot weather, thus maintaining cooler glass temperatures. Reducing heat loss in cold weather, thus maintaining warmer glass temperatures.
Because LoĒ³-340 is more than a solar control glass, its advanced design provides a very low U-Factor of 0.25. This results in more comfort and energy savings in cold weather.
One of the best ways to compare comfort is to use the Mean Radiant Temperature (MRT). MRT can be thought of as a “feels like” temperature; the closer the MRT is to the thermostat setting, the better the comfort will be.
Double glazing improves the winter comfort, especially when a low-emittance LoĒ³ coating is used. A double-pane window with a conventional tinted glass and low-e on the #3 surface (air-space side of indoor pane) improves the solar blockage, but exposes the building occupants to hot glass temperatures in the summer.
LoĒ³-340 is placed on the #2 surface (air-space side of outdoor pane) and provides the best comfort through all the seasons.
Less heat gain when it’s hot, less heat loss when it’s cold, more comfort year-round, and the best glare control under the sun.
Finally, LoĒ³-340 delivers the lowest UV transmission of any LoĒ glass we offer. This greatly reduces fading on furniture, carpet, draperies and everything inside the home.
Duralite® from Quanex is a warm-edge spacer system used in the high-volume production of dual- and triple-pane insulating glass units. Windows made with Duralite have a smooth surface appearance, superior argon gas retention and a warmer edge of glass, adding comfort and energy efficiency to homes.
For the production efficiency, Duralite has a patented design that is applied in a single step using heat and minimal compression.
Smooth surface appearance
Superior argon gas retention
Improved condensation resistance
Warmer edge of glass temperature
Features / Sizes
Composite laminating technology
Polycarbonate spacer element (no metal)
Black or gray sightline
Proven adhesive technology
Sizes to accommodate airspaces of ¼” (6mm) to 13/16” (20.5mm)