Glass for All

Comfort in Any Kind of Weather

Who says you can’t do anything about the weather? Cardinal’s LoĒ²® coated glass delivers year-round comfort in any weather. In summer, it rejects the sun’s heat and damaging UV rays. In winter, it reflects heat back into the room.

Cardinal’s LoĒ²-272 offers a bit more light transmittance, while LoĒ²-270 gives a little more solar control.

Regardless of your location, choosing windows that provide the highest level of comfort and energy savings year-round is important. Choosing the right glass is the most crucial factor. So go beyond ordinary low-E glass. Let LoĒ² glass help you handle the weather – any weather.

Hot sun? Cool windows.

When the temperature is heading to the top of the thermometer, ordinary window glass lets the heat through. Cardinal LoĒ², however, is formulated to reject the sun’s heat and damaging rays and keep your home cool and comfortable.

Frigid outside, cozy inside.

During cold weather, the insulating effect of your windows has a direct impact on how your rooms feel. Typically, the largest 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.

To maintain comfort during the winter, select a glass that produces surface temperatures that stay above this point during the coldest outdoor conditions.

Inside Glass Temperatures
Inside Glass Temperature :
  • °F
  • °C

The superior insulating capability of Cardinal LoĒ² glass 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 properly. Proper humidity levels improve comfort and promote a healthier living environment.

Glass Performance
Visible Light
Fade Transmission
U-Factor :
  • IP
  • SI

All values calculated using Window 7.8. Emittance of ordinary (pyrolitic) low-E is 0.16.

Solar Heat Gain Coefficient – (SHGC):
The amount of solar radiation that enters a building as heat. The lower the number, the better the glazing is at preventing solar gain.

Fading Transmission:
The UV Transmittance is determined as an average for wavelengths 300 -380 nm. ISO is the weighted average for wavelengths 300 – 700 nm (based on CIE 89/3). This region includes all of the ultraviolet energy and part of the visible spectrum, and will give the best representation of relative fading rates. The lower the number, the better the glass is for reducing fading potential of carpets and interior furnishings.

This represents the heat flow rate through a window expressed in IP (BTU/hr·ft²·°F) and SI (W/m2K), using winter night weather conditions of 0°F outside and 70°F inside. The smaller the number, the better the window system is at reducing heat loss.

More information on the ENERGY STAR windows program.

GENERAL NOTES: (1) Data was calculated using the LBNL Window computer program per NFRC environmental conditions. (2) 90% argon/10% air fill is used for IG’s with LoE coated glass, otherwise 100% air fill is used for uncoated units.

The difference is clear.

Cardinal LoĒ² glass is ideal for all weather conditions in most climates. In summer, its patented coating blocks around 85% of the sun’s harmful ultraviolet rays and 60% of the sun’s heat. It even outperforms tinted glass often used in warm climates. You can see out and the light shines in, with no heavy bronze or smoke-colored tones to darken the personality of your home. In winter, it reflects heat back into rooms.

LoĒ² glass can be purchased in heat-strengthened, tempered, and laminated glass configurations, with a variety of shapes and sizes.

To learn more about LoĒ² and other Cardinal glass products, ask your window manufacturer, contractor, or architect.

Additional Resources