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Series 3900 sliding windows offer the same premium enhancements as Series 3900 double hung windows, plus:
InsulKor™ technology is a system of sash and frame enhancements that dramatically improves the performance of the Series 3900 double hung window. Our exclusive InsulKor fiberglass-enriched polyurethane sash reinforcement yields better energy efficiency while maintaining the structural integrity of traditional metal reinforcement. The optional InsulKor™ foam injections add thermal-enhancing insulation in specific hollows of the frame. The combination of foam-filled and dead air chambers optimizes each window's thermal properties for exceptional R-values. When combined with either of our R-5 rated, triple-pane glazing systems, these InsulKor enhancements help make the Series 3900 one of the most energy efficient, strongest window systems available today.
ADVANCED SERIES 3900 FEATURES
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