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138 Series Ultra-Insulated uPVC / Vinyl Sliding Windows with Nailing Flange

Introduction：

The 138 Series Ultra-Insulated uPVC / Vinyl Sliding Windows are designed as a premium window system for the North American market, offering exceptional insulation and structural strength for larger openings. The horizontal sliding design ensures smooth operation while maintaining a clean, modern appearance.

With an advanced 11-chamber uPVC profile, this system delivers superior thermal insulation and rigidity compared to conventional vinyl windows. Combined with premium American VIG hardware, it ensures stable operation, long service life, and reliable performance in demanding climate conditions. The integrated flanged design supports precise installation and long-term air and water tightness.

Basic Configuration

Type	Sliding Windows
Frame material	11 chambers UPVC profile
Frame thickness	138 mm
Thickness	2 mm
Glass	3Low-e+14Ar+3+14Ar+3Low-e(Warm Edge Spacer）
Hardware	VIG
Open Method	1 Fixed+1 Sliding
U-Factor	≤1.2w/㎡ ·k
Color	White/Black or Wood Colors(German Renolit Film)