LoĒ³-366® Raises the Bar for Glass Performance
For decades, Cardinal has set the standard for energy-efficient glass. Our LoĒ³-366 coated glass lifts the performance threshold to a new level.
A Perfect Balance, With the triple-layer coating of LoĒ³-366, you can truly have it all.
Year-Round Comfort, Unmatched Visibility and Aesthetic, and Substantial Energy Savings.
LoĒ³-366 is a clear coating that blocks even more solar gain, reflects heat, and lets the light stream in. It even outperforms the tinted glass often used in warm climates.
Beats the Heat, Keeps the View
When the temperature soars, ordinary window glass just can’t handle the heat. And tinted glass darkens the view. Our patented LoĒ³-366 glass has been formulated to reject the sun’s heat without spoiling visibility. It lets more light in and keeps more heat out.
It protects building interiors. LoĒ³-366 provides exceptional fading protection. It blocks 95% of the sun’s damaging ultraviolet rays, protecting your furniture, carpets, curtains and wall coverings for years to come.
It’s the Perfect Cold Remedy
During cold weather, the insulating effect of your windows has a direct impact on how your rooms feel.
The largest exposed surface of a window is the 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.
To maintain the best comfort during the winter, select a glass product that produces surface temperatures that stay above this point during the coldest outdoor conditions.
Inside Glass and Outside Temperatures
The table below compares the room-side center of glass temperatures of different glass types against two winter conditions.
Inside Glass Temperatures
| IG Type and Coating | -20°F Very Cold Outside | 20°F Cold Outside | -30°C Very Cold Outside | -10°C Cold Outside |
| Single Pane, Clear | 0°F | 31°F | -19°C | -3°C |
| Double Pane, Clear | 37°F | 51°F | -2°C | 9°C |
| Ordinary low-e, Clear | 46°F | 57°F | 7°C | 13°C |
| LoĒ3-366, Clear (Air Fill) | 49°F | 58°F | 9°C | 14°C |
| LoĒ3-366, Clear (Argon Fill) | 52°F | 60°F | 11°C | 15°C |
The superior insulating capability of 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 improve comfort and promote a healthier living environment.
What makes LoĒ³-366 glass different is its ability to handle each portion of the solar spectrum differently. The chart below shows the “spectrally selective” nature of the LoĒ³-366 coating.
LoĒ³-366 cuts down heat-inducing infrared light and nearly eliminates ultraviolet transmission, while maintaining a high level of the visible light transmittance.
ENERGY STAR, Everywhere
The goal of the U.S ENERGY STAR Windows program is to be better than code.
LoĒ³-366 can be made to qualify in all 4 climate zones: superior insulating value in the north, and clear solar control for everywhere else in the country. In the northern climate zone, choose LoĒ³-366 with a triple pane IG unit.
