The PVC Single Hung Window from Xiamen KDSBuilding combines traditional design with modern innovation to create a window that is both functional and visually appealing. Featuring a vertically sliding lower sash and a fixed upper sash, this design offers smooth operation, efficient ventilation, and enhanced energy performance. Constructed from high-quality PVC profiles, the window provides excellent resistance to corrosion, moisture, and UV radiation, making it durable and low-maintenance in any climate. The double-glazed glass and multi-chamber frame design deliver superior insulation, helping to reduce heat transfer and noise infiltration while maintaining comfortable indoor temperatures year-round. Equipped with secure locking mechanisms and airtight sealing, it effectively prevents water and air leakage, ensuring lasting performance and safety. Its clean lines and timeless proportions make it suitable for a wide range of architectural styles, from modern apartments to classic homes. Certified by NFRC and CE, KDSBuilding’s PVC Single Hung Window meets international standards for quality, efficiency, and durability. With easy cleaning, elegant appearance, and reliable functionality, it is an excellent choice for homeowners and builders seeking a cost-effective, energy-efficient, and aesthetically pleasing window solution.