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One of the very persuasive causes to replace windows is to enhance energy efficiency. Older windows often function single-pane glass and dated frames that allow temperature to escape during the wintertime and allow heat in through the summer. By choosing energy-efficient windows, homeowners may reduce energy reduction, reducing heat and cooling charges significantly. Many contemporary windows come built with dual or triple-pane glass, low-emissivity (Low-E) films, and Columbia window replacement gasoline fills, which work together to keep up a steady indoor temperature.