35 34 Clean design with narrow sightlines and wide glass panels AAMA- and NFRC-tested and certified Integrated weep system with 1.5″ sill height Low-E, dual-paned, argon-filled glass from Cardinal IG A .29 U-factor for energy efficiency The Series 3700 Vinyl Multi-Slide Door is not only our most economical solution for indoor-outdoor living, but it also boasts several key features that make it stand out from other options on the market. While narrow sightlines and wide glass panels offer a sleek, modern aesthetic, the door has been designed for optimized installation and the ease of operation Western Window Systems is known for. With the value and efficiency of vinyl, it’s a low-maintenance alternative that brings style and flexibility to your design. Vinyl Line: Series 3700 Multi-Slide Door Learn more Series 3700 Vinyl Multi-Slide Door
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