125 Series Heavy-Duty Commercial Modern Energy Efficient Office Door External Glass Slide Large Sliding Patio Doors and Windows for Home

125 Series Heavy-Duty Commercial Modern Energy Efficient Office Door External Glass Slide Large Sliding Patio Doors and Windows for Home. We One of the few manufacturing enterprises in China that have more than ten products certified by NFRC and C-S-A and have achieved outstanding performance in doors and Windows. Energy Performance ratings: U-factor(U.S/I-P), 0.20; solar heat gain coefficient, 0.17; visible ransmittance, 0.29; air leakage(U.S/I-P)<=0.3. Resistance to wind load - Test pressure: 3000pa; Relative frontal deflection: Class E 2000; Watertightness - Non-shielded (A): Class E700. Our 80 series windows are With C-S-A, NFRC and CE certifications. We are the first factory in China to receive the U.S. ENERGY STAR certification; partnering with us makes you eligible for U.S. government subsidies. Our company integrates manufacturing and trading. We possess extensive experience in production and export, and our products are widely sold in North American and European markets.