CARDINAL CG COMPANY

Solar and Glare
Control Glass

A Superior Defense Against
Sweltering Solar Heat

Wherever heat and glare are a problem, Cardinal’s LoĒ²-240® and LoĒ³-340® glass are the ideal solution. With unparalleled solar performance and optimum glare protection, LoĒ²-240 and LoĒ³-340 keep the sun in its place.

The result? Maximum comfort and great views, even on the warmest of days. 

LoĒ²-240 is an excellent overall performer for climates where the sun is constantly on the offensive.

As a specially formulated two-layer coating, many opt for LoĒ²-240 for its great solar performance and gentle gray hue.

Our newest triple-layer LoĒ³-340 simply has no equal for reducing solar heat gain.

Its SHGC of 0.18 slashes the sun’s thermal energy. And wherever glare is a problem, LoĒ³-340 keeps it in check.

LoĒ³-340 delivers the lowest UV blocking of any LoĒ glass we offer. This greatly reduces fading on furniture, carpet, drapes, and everything inside the home.

Control the Glare.

Too much sunlight makes it difficult to see. This can cause problems like eye strain, headaches, and overall discomfort. Furthermore, solar glare can make it hard to use computer screens, televisions, and electronic devices.

LoĒ²-240 and LoĒ³-340 glass have special anti-glare properties that allow sufficient visible light through, without being excessive. No need to use drapes or blinds, which otherwise diminish the visual benefit of windows in the first place.

Glare Control Comparisons

Glare Control Glass

Rejects most solar heat, controls glare. Rooms stay cool, comfy and attractive.

Grey Tinted Glass

Cuts sunlight by 50%, but poor solar heat control. Glass temperatures can exceed 100°F.

Clear Glass

Transmits 80% of solar energy. No glare control, no protection. Blinds required.

LoĒ²-240 and LoĒ³-340 Cut Out
Unwanted Parts of the Spectrum
Ultraviolet
(UV)

UV is invisible and makes up
about 3% of the total solar energy. This region of wavelengths is typically associated with fading of fabrics, paints, furniture, and other household items.

Visible
Light

This portion of the solar spectrum makes up about 45% of total solar energy.

Near Infrared
(NIR)

NIR is approximately 52% of the solar energy and invisible to the eye.

What makes these glass coatings different is their ability to handle each portion of the solar spectrum differently.

The plot shows the “spectrally selective” nature of the LoĒ²-240 and LoĒ³-340 coatings.

They cut down heat-inducing infrared light and nearly eliminate ultraviolet transmission, while maintaining a proportionately high level of the visible range.

LoĒ²-240

LoĒ3-340

84%

98%

Blocks over 84% 98% of the harmful UV radiation.

60%

60%

Rejects 60% 60% of the visible light, which gives the coating excellent glare control.

~92%

~99%

Rejects nearly all the heat producing infrared rays.

UV LIGHT

VISIBLE LIGHT

NIR LIGHT

Grey Tinted Glass

Clear Glass

  • Wavelength (Nanometers)
  • Light Spectrum
Enjoy all season
comfort.

LoĒ²-240 and LoĒ³-340 control more than the sun. During cold weather, their advanced coating design also provides an extremely low U-Factor to deliver comfort and energy savings.

Year-round thermal comfort is a result of warm glass temperatures in the winter, cool glass temperatures in the summer, and the blockage of oppressive solar heat gains. Note in the chart below that the solar blockage for single pane tinted glass is marginal, and the extreme temperature fluctuations can lead to serious year-round comfort problems.

Inside Glass Temperatures
Coated Glass Product
Tinted
LoĒ²-240, Clear(Argon Fill)
LoĒ³-340, Clear (Argon Fill)
Winter Night
°F
44°
55°
56°
Summer Day
°F
95°
86°
84°
Solar Blockage
%
42%
75%
82%

Double glazing improves the winter comfort, especially when a low emittance LoĒ coating is used. A double-pane window with a conventional tinted glass improves some solar blockage but leaves the building occupants exposed to hot glass temperatures in the summer. LoĒ²-240 and LoĒ³-340 are placed on the #2 surface (air-space side of outdoor pane) and provides the best comfort through all the seasons.

Get ready for
maximum solar
comfort

If you envision your home’s design benefiting from a tinted glass for glare control, both LoĒ²-240 and LoĒ³-340 offer a great combination of aesthetic appeal along with energy performance and indoor comfort.

Glass Performance
IG Type and Coating
2 Pane, Gray Tint, LoĒ-180(#3)
LoĒ2-240, Clear
LoĒ3-340, Clear
Visible Light
Trans-mittance External Reflectance Internal Reflectance
53%
9%
14%
40%
14%
11%
39%
13%
16%
Fade Transmission
UV ISO
17%
42%
16%
35%
2%
27%
Solar
Heat Gain Coefficient
0.49
0.25
0.18
U-Factor :
  • IP
  • SI
Air
Fill
Argon
Fill
0.31
1.74
0.26
1.48
0.31
1.72
0.26
1.46
0.29
1.66
0.25
1.39

Note:
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.

U-Factor:
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.

Double glazing improves the winter comfort, especially when a low emittance LoĒ² 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 leaves the building occupants exposed to hot glass temperatures in the summer. LoĒ²-240 and LoĒ³-340 are placed on the #2 surface (air-space side of outdoor pane) and provide 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.

LoĒ²-240 and LoĒ³-340 can be purchased in heat- strengthened, tempered, and laminated glass configurations, with a variety of shapes and sizes.

To learn more about LoĒ²-240 and LoĒ³-340 and other Cardinal Glass products, ask your window manufacturer, contractor, or architect.

Additional Resources

COATED GLASS TECHNOLOGY TOUR  5:46 min

 LoĒ³-340 GLASS PDF BROCHURE

 LoĒ2-240 GLASS PDF BROCHURE