Product Selection Guide CURTAIN WALLS - PRODUCT COMPARISON EFCO KAWNEER OLD CASTLE BUILDING ENVELOPE US ALUMINUM YCW 750 XT IG High Performance Inside Glazed Thermally Broken Curtain Wall System - 1600 Wall System®4 Reliance™-TC IG Series 4250T YCW 750 SplineTech® Thermally Improved Storefront System - 1600 SS Reliance™-SS YCW 752 Outside Glazed Thermally Improved Pressure Wall System S-5600 2 " 1602 Wall Reliance™-LT Series 2200 YCW 752 OGP Outside Glazed Thermally Improved Pressure Wall System - 1620 Curtain Wall System Reliance™-LT (Polyamide) - YCU 750 TU Thermally Broken Unitized Curtain Wall System X-Therm® 8250 - Reliance Unit Wall™ - YUW 750 TU Unitized curtain wall system. X-Therm® 8250 2500 UT Unitwall™ Signature Series Unit Wall - YKK AP PRODUCT Page-22 Series 3150/3250 (With custom mullions) PS-1000-08 | Effective Date: April 28, 2020