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How Low-E and Argon Gas works

Our optional ClimaTech insulated glass package combines multi-layered low-emissivity (Low-E) glass, argon gas** and the PPG Intercept Warm-Edge Spacer System. ClimaTech is up to 40% more energy efficient than most other Low-E or Mid-E glass systems and provides more than twice the energy efficiency of clear glass units. Excalibur Windows with ClimaTech exceed the performance requirements set forth by the U.S. Department of Energy in conjunction with the National Fenestration Rating Council (NFRC) test criteria.
One of the most critical NFRC tests measures the rate of heat loss through a window or door (U-Factor). The lower the U-Factor, the better the product is at resisting heat flow, which results in a product with a greater insulating value.

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