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

It is economical and easy to maintenance,if you purchase and install aluminum tilt and turn window. An aluminum tilt and turn window allows users to switch easily between ventilation and full opening. The inward-opening design makes cleaning simple, especially for high-rise buildings. Durable aluminum profiles ensure strength, reliability, and a refined contemporary look. series: 55 series thermal break opening style: TILT AND TURN Glass: 5mm+9A+5mm clear tempered glass Color: GREY Certification: NFRC, AAMA, CE, TITLE 24, AS2047 U-Factor  ≤ 0.3 SHGC ≤ 0.23