Next Dimension Vinyl Windsor Windows - Sliding Patio Doors. Established in 1946, Windsor Windows & Doors offers quality windows and doors for builders, architects and homeowners, with a solution for nearly every application: Pinnacle Wood, Legend Cellular PVC, Next Dimension Vinyl, Bi-fold doors, and WinPac sash replacement kit. Our Pinnacle, Legend, and Next Dimension products are all custom-built. Each product is designed to meet your specific needs, depending on architectural style, regional preference and price point. Windsor is an Energy Star® Partner and our products are NFRC rated, meaning that they meet exacting standards for energy efficiency and durability. You can find Windsor products at select dealers throughout the United States, Mexico and Canada. To find a Windsor dealer near you, please visit the Dealer Locator on our website at http://windsorwindows.com/DealerLocator.page