When you purchase upvc profile double hung  window 006, you purchase directly from the factory. PVC double hung windows feature two operable sashes that slide vertically, allowing flexible ventilation from the top or bottom. Compared with sliding or fixed windows, they provide better airflow control and easier cleaning, as both sashes tilt inward. PVC material offers excellent thermal insulation, long-term durability, and resistance to moisture, corrosion, and UV exposure, making maintenance minimal and ensuring stable performance in various climates. series: 82 series PVC Color: white opening style: Double Hung Glass: 3mm+12A+3mm clear tempered glass Certification: NFRC, AAMA, CE, TITLE 24, AS2047 U-Factor  ≤ 0.3 SHGC ≤ 0.21 Visible Transmittance: 0.41 Air Leakage: 0.15

When you purchase upvc profile double hung  window 005, you purchase directly from the factory. Designed for both comfort and efficiency, PVC double hung windows outperform single hung and fixed windows by offering dual-sash operation for improved ventilation. The tilt-in function allows convenient interior cleaning, ideal for multi-story buildings. PVC profiles ensure strong weather resistance, high energy efficiency, and long service life without warping or peeling. Unlike wood windows, PVC requires no repainting and delivers reliable performance with low maintenance costs. series: 82 series PVC color : white opening style: Double Hung Glass: 3mm+12A+3mm clear tempered glass Certification: NFRC, AAMA, CE, TITLE 24, AS2047 U-Factor  ≤ 0.3 SHGC ≤ 0.21 Visible Transmittance: 0.41 Air Leakage: 0.15

When you purchase upvc profile double hung  window 002-2, you purchase directly from the factory. PVC double hung windows combine classic appearance with modern performance. Unlike casement windows, they do not swing inward or outward, saving interior and exterior space. The dual movable sashes enhance air circulation and safety. Made from durable PVC, these windows resist rot, rust, and fading while providing excellent thermal and acoustic insulation. Their smooth surface allows easy cleaning and minimal maintenance throughout long-term use. series: 82 series PVC color : white opening style: Double Hung Glass: 3mm+12A+3mm clear tempered glass Certification: NFRC, AAMA, CE, TITLE 24, AS2047 U-Factor  ≤ 0.3 SHGC ≤ 0.21 Visible Transmittance: 0.41 Air Leakage: 0.15

Good sealing performance: aluminum alloy profile is easy to be extruded, which is a sealing material with good elasticity and durability.

KDSBUILDING supply factory direct sale upvc sliding window 014. With a sleek and practical design, PVC sliding windows enhance both appearance and performance. The robust PVC structure improves insulation and weather resistance, while precision hardware ensures smooth sliding. Optional glazing and mesh systems make them adaptable to different project requirements and regional standards. series: 60 series PVC opening style: Top sliding and bottom fixed Color: White Glass: 5mm+9A+5mm clear tempered glass Certification: NFRC, AAMA, CE, TITLE 24, AS2047 U-Factor  ≤ 0.3 SHGC ≤ 0.23

KDSBUILDING supply factory direct sale upvc sliding window 002. PVC sliding windows maximize natural light while preserving interior space. The smooth sliding system ensures effortless use, and the PVC construction provides thermal insulation and sound reduction. Resistant to rust and decay, these windows are a durable and economical solution for modern buildings. series: 60 series PVC opening style:  sliding  Color: white Glass: 5mm+9A+5mm clear tempered glass Certification: NFRC, AAMA, CE, TITLE 24, AS2047 U-Factor  ≤ 0.3 SHGC ≤ 0.23 Visible Transmittance :  0.41 Air tightness :  0.15 Nail Fin Design  :  YES Window Screen :  With removable screen Grille design : Yes

KDSBUILDING supply factory direct sale upvc casement window 22. PVC casement windows combine classic operation with modern materials. The outward or inward opening design allows flexible ventilation, while the insulated PVC profile reduces heat loss and noise. With low maintenance requirements and strong durability, they are suitable for homes, apartments, and commercial projects. series: 60 series PVC opening style:  casement with top arch fixed Color: white Glass: 5mm+9A+5mm clear tempered glass Certification: NFRC, AAMA, CE, TITLE 24, AS2047 U-Factor  ≤ 0.3 SHGC ≤ 0.23 Visible Transmittance :  0.41 Air tightness :  0.15 Nail Fin Design  :  NO Window Screen :  no Grille design : Yes