Featuring a beefed-up energy package, Ultra EP casement and awning windows are made with triple-pane glass for improved performance in colder climates. The aluminum-clad wood windows come standard with 1?-inch insulating glass and LoE coatings that can achieve U-factors as low as 0.19. Kolbe & Kolbe | kolbe-kolbe.com | 800.955.8177.
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