Our enhanced performance glass …is even more enhanced.
Introducing LoĒ-i89™, our new energy-saving 4th surface (roomside) coated glass. It offers more light transmittance, less reflectance and it now is available in a less expensive annealed version.
Yet it still delivers a center of glass U-factor of just 0.20 when coupled with our LoĒ³ or LoĒ² glass and argon fill in a double-pane unit. Without argon and with or without capillary tubes, the unit still delivers a U-factor of just 0.23 – perfect for high altitudes.
So if you’re ENERGY STAR compliant today, by adding LoĒ-i89 you’ll be compliant tomorrow as well.
What’s more, LoĒ-i89 is easy to clean and there’s no haze to mar the view. That’s our new LoĒ-i89, our enhanced enhanced performance glass.
Turn your double-pane windows into triple-pane performers.
There’s no need to go to triple-pane windows to meet the various energy-saving guidelines. No need to invest in redesigning your windows and altering your manufacturing processes either. A double-pane IG unit with LoĒ-i89 can meet the guidelines.
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 our LoĒ² or LoĒ³ glass and argon fill, this double-pane unit delivers performance much better than clear triple-pane – a center of glass U-factor of just 0.20 compared to 0.37 with clear triple-pane.
To surpass the U-factor performance of our LoĒ-i89 double-pane unit, you would need to go to a triple-pane unit with a low-E coating in each gap.
|Double-Pane, Clear, Air||0.48|
|Double-Pane w/LoĒ³-366, Argon||0.24|
|Double-Pane w/LoĒ³-366 and LoĒ-i89, Air||0.23|
|Double-Pane w/LoĒ³-366 and LoĒ-i89, Argon||0.20|
7/8″ IG UNIT
|Triple-Pane w/LoĒ³-366, Argon||0.25|
|Triple-Pane w/LoĒ³-366, LoĒ-180, Argon||0.20|
|Triple-Pane w/LoĒ³-366, LoĒ-180, LoĒ-i89, Argon||0.17|
Meet today’s strictest energy efficiency guidelines.
With a center of glass U-factor of only 0.20 (0.23 without argon) and SHGC of just 0.25, an insulating glass unit with LoĒ³-366 and LoĒ-i89 meets the most stringent energy standards – without going to a triple-pane unit.
This allows you to offer more double-pane window options that can meet the proposed ENERGY STAR guidelines throughout North America.
The advantages are more than clear.
In addition to providing maximum energy efficiency in a double-pane unit, LoĒ-i89 offers several other customer-pleasing benefits.
Its surface is smooth, making it easier to remove label residue and clean. And perhaps most importantly, there’s no haze to mar the view.
Naturally Cardinal IG units with LoĒ-i89 live up to the Cardinal reputation for long-range durability, delivering the industry’s lowest failure rate – only 0.20% over 20 years.
Give homeowners another reason to love LoĒ-i89 units – include Neat® naturally clean glass on the outside. Your windows stay cleaner longer and clean easier. Finally, protect your windows in transit as well as on the job site with Preserve® protective film.
|Glass Performance||Visible Light
|Solar Heat Gain
(Air / Argon)
|Fade UV||Fade ISO|
|LoĒ-180, LoĒ-i89||77%||0.62||0.24 / 0.21||0.27||0.61|
|LoĒ²-272, LoĒ-i89||70%||0.41||0.23 / 0.20||0.16||0.53|
|LoĒ²-270, LoĒ-i89||69%||0.36||0.23 / 0.20||0.14||0.51|
|LoĒ³-366, LoĒ-i89||63%||0.27||0.23 / 0.20||0.05||0.41|
|LoĒ-180, LoĒ-180, LoĒ-i89||68%||0.50||0.21 / 0.17||0.13||0.49|
|LoĒ²-272, LoĒ-180, LoĒ-i89||62%||0.34||0.21 / 0.17||0.08||0.43|
|LoĒ²-270, LoĒ-180, LoĒ-i89||60%||0.30||0.21 / 0.17||0.07||0.42|
|LoĒ³-366, LoĒ-180, LoĒ-i89||56%||0.22||0.21 / 0.17||0.02||0.35|
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 portion of energy transmitted in a spectral region from 300 to 700 nanometers. 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 BTU/hr·ft²·°F, 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.
Cardinal actively supports and participates in The National Fenestration Rating Council (NFRC). Windows with LoĒ-i89 and LoĒ² or LoĒ³ that are rated and certified by the NFRC can comply with Energy Star™ requirements for most climates in the country. (See https://www.energystar.gov/index.cfm?fuseaction=find_a_product.showProductGroup&pgw_code=WI for more information on the Energy Star windows program.)
Take your window U-factors to a new low – with LoĒ-i89.
LoĒ-i89 on the 4th surface of your windows allows you to get near triple-pane performance in a double-pane unit, and meet the toughest energy guidelines as well. Finally, LoĒ-i89 can be purchased in hurricane-resistant laminated glass in a variety of shapes and sizes.
To learn more about LoĒ-i89 and other Cardinal glass products, ask your contractor or architect.