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LoĒ²-272 Glass for All Climates

LoĒ² -272 glass delivers year round comfort, and is ideal for all weather conditions in most climates, whether it’s 20 below or 110 in the shade. In winter, LoĒ²-272 reflects heat back into the room. In summer, it rejects the sun’s heat and damaging UV rays. Not only is it the clearest, highest performing glass you can buy, there’s no haze or bluish cast.

LoĒ²-272 Glass for All Climates

LoĒ-i89 Roomside LoĒ Glass Enhanced Winter Performance Glass

LoĒ-i89 is an energy-saving 4th surface coated glass. It offers more light transmittance and less reflectance than LoĒ-i81. And it’s now available in annealed making it less expensive. 

When LoĒ-i89 is used in conjunction with LoĒ³-366, your windows are in compliance with ENERGY STAR. What’s more, the LoĒ-i89 surface is smooth and scratch resistant, making it easier  to clean and there’s no haze to mar the view.  As well, rather than absorbing internal heat, LoĒ-i89 reflects it back into the room, making your living space feel warmer and more comfortable. LoĒ-i89, an enhanced performance glass.

Double-pane windows become triple-pane performers.

LoĒ-i89 is sputtered onto the indoor lite, the #4 surface, thus reflecting escaping heat back into the room and lowering U-factors. Coupled with LoĒ² or LoĒ³ glass and argon fill, this double-pane unit delivers performance much better than a clear triple-pane.

LoĒ - 180 Passive Solar Control Glass

LoĒ – 180 keeps homes warmer and more comfortable by blocking heat loss to the outside and letting the sun’s heat stream in. LoĒ – 180 is the ideal product for passive solar applications. It extends a warm welcome home while achieving the highest ER values.

Regardless of where your home is located, choosing windows that provide you with the highest level of comfort and energy savings year-round is extremely important. And choosing the right glass for your windows is the most important factor in the decision. Go beyond ordinary low-e glass – choose Cardinal LoĒ-180, the ideal choice for passive solar designs.

LoĒ - 180 Passive Solar Control Glass

LoĒ³ - 366 Ultimate Solar Control Glass

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 also the one glass you can use to be compliant in every ENERGY STAR zone – in a double-pane window. Couple it with LoĒ-i89®, and you’re compliant in the North.

A unique triple-layer coating. 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.

LoĒ³ - 366 Ultimate Solar Control Glass

Innovation through superior glass engineering

Products Include:

Cardinal Glass Industries Inc.
AGC - Beyond Glass

AGC Glass Company is one of the largest manufacturers of glass and glass-related products in North America, offering a broad selection of flat glass and high-performance coatings for commercial, residential and industrial applications.

Products Include:



Energy Select 20


Triple-Silver low-e coating on AGC tinted float glass for maximum solar control.

Energy Select 20 combines the high performance of AGC’s triple-silver low-e coating with an array of tinted glass substrates to yield the best solar heat gain coefficient available. With SHGC as low as .20, and a light-to-solar gain ratio of up to 2.02, depending on the tint selected, this low-e glass is an obvious choice for climates where air-conditioning costs are a concern.

Energy Select 20 is available in 3 distinct tints -Pure Grey, Pure Bronze and Forest Green and provides excellent solar control, blocking up to 80% of the heat generated by the sun, as well as aesthetics that blend harmoniously with nature.


An array of nature-inspired tinted substrates

Reduced cost for high-cooling demand regions

Low levels of interior and exterior reflectivity

Available annealed and post-temperable

Energy Select 25

Solar control low-emissivity coating on AGC tinted float glass.

Energy Select 25 is an offering of tinted solar control low-e glass, developed to provide more options when designing to meet the most challenging energy code requirements. Based on the tinted glass option desired,  achieve as low as a 0.25 solar heat gain coefficient in a double glazed insulating unit. Meet code and achieve stunning aesthetics.

Energy Select 25 is available in 3 distinct tints - Pure Grey, Pure Bronze and Forest Green


More color options to meet most demanding energy codes

Low levels of interior and exterior reflectivity

High visible light transmission

Meets energy codes for regions where cooling is the main energy concern


Energy Select 23
Maximum solar control low-e glass

Energy Select 23 is designed for maximum solar control in the hottest climate regions. Featuring a neutral blue reflected color, 50% visible light transmittance and 0.23 solar heat gain coefficient, this high performing low-e glass lets natural light in, while keeping more heat out—maximizing energy savings and creating greater indoor comfort. 

Energy Select 28

Neutral triple-silver solar control low-e with high visible light transmission

The combination of excellent solar control, a neutral appearance and low reflectivity make Energy Select 28 an obvious choice for commercial buildings in the warmest climate regions. In areas where air conditioning costs are the primary concern, Energy Select 28 provides exceptional solar blocking performance, while maintaining a high level of visible light transmission, maximizing building performance and indoor comfort.

Energy Select 31

Neutral reflective low-emissivity glass for energy efficiency and year-round savings

With a solar heat gain coefficient of 0.31 and visible light transmittance of 62%, the high clarity and neutral appearance make Energy Select 31 a natural choice for commercial and mixed-use building applications—meeting even the most stringent energy code requirements. Energy Select 31 provides exceptional performance for both warm and cold weather throughout North America, resulting in energy savings on both heating and cooling. 

Energy Select 36

Low-emissivity soft-coated glass that blocks solar heat in warm climates

Energy Select 36 provides the warm-weather energy efficiency, beautiful appearance, and high light transmittance levels to meet the needs of today’s architects.

Energy Select 36 is an outstanding solar heat blocker, designed for regions where air conditioning is the primary energy component. With high levels of light transmittance and a neutral appearance—Energy Select 36 is a beautiful choice for meeting code in your buildings. 

Energy Select 40

Low-emissivity soft-coated glass providing moderate solar heat blocking in moderate climates

The ideal solution for regions with moderate climates, AGC’s Energy Select 40 delivers energy savings and high levels of natural light transmission, all with a stunning neutral appearance. 

With excellent solar heat blocking performance, Energy Select 40 is the premier solution for commercial buildings in moderate climate regions. A balanced performer, Energy Select 40, provides excellent solar control that maximizes air conditioning efficiency and delivers interior comfort with outstanding levels of daylighting.

Energy Select 63

Low-emissivity soft-coated glass allows for solar gain and high levels of visible light and daylighting.

In colder climates, Energy Select 63 capitalizes on free solar energy to maximize heat gain and minimize annual heating costs. The ideal choice for the Northern regions, Energy Select 63 enables free solar heat gain during winter months, retaining radiant energy within the building and flooding the interior with light - resulting in more comfortable interior spaces. Energy Select 63 provides outstanding insulating performance and beautifully neutral color to complement any design.

Energy Select 73

Low-emissivity hard-coated glass that provides thermal insulation with passive solar gain

Energy Select 73 is a pyrolytic low-emissivity glass that combines excellent year-round energy efficiency with hard-coat durability. Energy Select 73 saves energy costs by reflecting heat back into the room during colder months—while also allowing free solar energy into interior spaces. During warmer months, Energy Select 73 reduces direct sunlight and blocks re-radiated solar heat. 

Energy Select R42

Beautifully reflective low-emissivity glass

With its low SHGC and high reflectivity, Energy Select R42 from AGC is the perfect choice for high rise residential and architectural facades. 

Energy Select R42 is an outstanding solar blocker, making it the natural choice for those regions where air conditioning is used most of the year. To meet the high aesthetic needs of today's Architects, Energy Select R42 offers excellent light transmission and an aesthetically neutral reflectance.


Energy Select a high performance low-e coated glass designed specifically for the architectural market. With a broad range of options, Energy Select was developed to help Architects meets the regulatory challenges of each project, while maintaining their design vision. ENERGY Select …Energy Efficiency with options. 

Comfort Select 28


Maximum solar control for the hottest climates

Comfort Select 28 is a triple silver soft-coated low-e glass designed for maximum solar control performance in the hottest climates of the Southern region. The 0.28 SHGC, 0.24 U-value and 62% VLT provides impressive solar blocking, while providing aesthetic appeal with its high level of light transmission and neutral color. Comfort Select 28 is ideal for meeting the energy code requirements in climates that are cooling dominate.g a 0.25 U-value, 0.43 SHGC and 65% VLT. The mid-range solar heat gain coefficient (SHGC) makes Comfort Select R42 ideal for moderate to cooler climates of the North and North-central regions.

Comfort Select 36


Solar control for the north-central and south-central regions

Comfort Select 36 is a soft-coated low-e glass providing a higher level of solar heat control in moderate and warm climate regions. With a 0.25 U-value, 0.36 SHGC and 66% VLT, Comfort Select 36 improves energy efficiency and keeps interior temperatures comfortable in the North-Central and South-Central regions.

block solar energy providing a 0.25 U-value, 0.43 SHGC and 65% VLT. The mid-range solar heat gain coefficient (SHGC) makes Comfort Select R42 ideal for moderate to cooler climates of the North and North-central regions.

Comfort Select 40


Solar heat control in moderate to hot climates

Comfort Select 40 is a soft-coated low-e glass providing solar heat control in moderate to hot climates of the North-Central and South-Central regions. Comfort Select 40 delivers a 0.24 U-value, 0.39 SHGC and 72% VLT. The neutral appearance and high level of natural light transmitted makes Comfort Select the ideal solution for homes where heating and cooling requirements vary throughout the year.

Comfort Select 63


Thermal insulation and passive solar control

Comfort Select 63 is a neutral soft-coated low-e glass that provides thermal insulation and captures passive solar energy in cooler climates. With a U-value of 0.26, SHGC of 0.61 and 79% VLT, Comfort Select 63 allows free solar heat gain during winter months, while also retaining radiant energy within the interior of the home for added comfort in Northern and North-Central regions.

Comfort Select 73


Hard-coated passive solar low-e glass

Comfort Select 73 is a durable hard-coated low-emissivity glass that provides passive solar gain resulting in year-round cost savings. Designed for use on the #3 surface, Comfort Select 73 offers a U-value of 0.29 and solar heat gain coefficient (SHGC) of 0.72 maximizing energy efficiency in the colder Northern region climates, where heating is dominant and the greatest energy concern. 

Comfort Select 73 may be used on the #4 surface, combined with a sputter (soft) or pyrolytic (hard) coating on the #2 surface for maximum performance in colder climates. Visit our web page and learn more about our U4 - 4th Surface Technology and how this configuration of coatings can improve overall window performance by 15% or more.

Comfort Select R42


Neutral reflective soft-coated low-e

Comfort Select R42 is a neutral reflective soft-coated low-e glass designed to block solar energy providing a 0.25 U-value, 0.43 SHGC and 65% VLT. The mid-range solar heat gain coefficient (SHGC) makes Comfort Select R42 ideal for moderate to cooler climates of the North and North-central regions.

Comfort Select meeting ENERGY STAR® requirements is just one aspect of window performance. AGC's Comfort Select™ line takes things a step further—providing energy performance specifically tailored to your region to give you a bigger advantage. And with U4 - 4th Surface Technology, you can get even more performance from your current double-glazed units.


 Energy Star Regions Map
Energy Star northern regions
Energy Star north-central regions
Energy Star south-central and southern regions
IGMA - Insulating Glass Manufacturers Alliance

IGMA The world’s leading organization on the engineering and manufacturing of insulating glass. IGMA is the international standards development organization for the insulating glass industry. Their focus is on developing new technologies in the manufacturing of insulating glass units supported by new research, best practices and the development of codes and standards.

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