The PVC Double Hung Window from Xiamen KDSBuilding is designed to provide versatility, comfort, and durability in one elegant package. Both the upper and lower sashes can slide vertically, allowing flexible ventilation options while maintaining excellent energy performance. Crafted from premium PVC profiles, this window offers exceptional resistance to corrosion, fading, and weathering, ensuring long-term durability with minimal maintenance. The double-glazed glass and multi-chamber frame design deliver outstanding thermal insulation and sound reduction, keeping interiors comfortable and quiet all year round. Each sash is counterbalanced for smooth, effortless operation, and both can tilt inward for easy cleaning from inside the room—an ideal feature for multi-story buildings. With airtight sealing and advanced locking systems, the PVC Double Hung Window prevents air and water leakage, enhancing energy efficiency and security. Available in various colors and finishes, including classic white and woodgrain textures, it perfectly complements diverse architectural styles. Certified under NFRC and CE standards, KDSBuilding’s PVC Double Hung Window combines modern functionality with timeless design, making it a preferred choice for homeowners, architects, and developers seeking reliable, attractive, and eco-friendly window solutions.