Crystal View™ standard acrylic block windows combine the insulating value of acrylic with an optimum dead air space to give them insulated glass efficiency, a difference of 35% over other prefabricated block windows. By adding the ULTRA Low-E™ option, the insulating value of a Crystal View™ acrylic block window increases even more; approximately 50% more than other prefabricated block windows. With a U-Factor of 0.35 and a Solar Heat Gain Coefficient below 0.40, Crystal View™ Ultra Low-E™ acrylic block windows are one of the only block window products qualified for ENERGY STAR® in all four regions of the United States.

ULTRA Low-E™ Brochure

ULTRA Low-E™ Press Release

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