The PVC Top Sliding + Bottom Fixed Window from Xiamen KDSBuilding offers a perfect balance between functionality, visibility, and energy efficiency. This unique dual-structure design features a top sliding sash for ventilation and a bottom fixed panel for unobstructed outdoor views and enhanced insulation. Crafted from premium PVC profiles, the window provides outstanding durability, corrosion resistance, and weatherproof performance. The top sliding sash glides smoothly on high-quality rollers, ensuring easy operation without occupying interior or exterior space. The bottom fixed section, fitted with double-glazed glass, enhances energy savings and noise reduction, maintaining a comfortable indoor environment all year round. With precision-engineered airtight seals, the window effectively blocks wind, rain, and dust while maintaining superior thermal insulation. Available in various finishes and glass options, it complements modern, traditional, and commercial building designs. KDSBuilding’s PVC Top Sliding + Bottom Fixed Window meets international standards like NFRC and CE, reflecting the company’s commitment to quality and sustainability. Ideal for apartments, offices, and residential homes, this window delivers a refined appearance, practical ventilation, and long-lasting performance — a smart choice for modern architecture seeking both elegance and efficiency.