Introducing LoĒ-i89™, our new 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. 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.
When LoĒ-i89 is used in conjunction with LoĒ³-366®, your windows are in compliance with ENERGY STAR guidelines across the country, including the stricter northern guidelines taking effect in 2014.
What’s more, LoĒ-i89 is easy to clean and there’s no haze to mar the view.