Product Selection Guide STOREFRONTS - PRODUCT COMPARISON YKK AP PRODUCT YCN 45 FS (Center Set) Ribbon Window Storefront System YCN 45 FI (Center Set) Ribbon Window Storefront System YES 40 FS (Center Set) Outside Glazed Storefront System YES 40 FI (Center Set) Outside Glazed Storefront System YES 45 FS (Center Set) Center Set Storefront System YES 45 FI (Center Set) Center Set Storefront System YES 45 TU (Center Set) Thermally Broken Storefront System YES 45 TU (Front Set) Thermally Broken Storefront System EFCO KAWNEER OLD CASTLE BUILDING ENVELOPE US ALUMINUM - - - Series 450-S - - - Series 451-S - Trifab® 400 - Series 400 - - - - Series 401 (NT) Trifab® VG 450 (Center Glazed) FG-2000 Series 450 Series 402 (NT) Trifab® VG 451 (Center Glazed) FG-3000 Series 451 Series 403 (T) Trifab® VG 451 T Series 3000 Thermal Multiplane Series IT 451 Thermal Series 433 Trifab® VG 451 T ThermaStackTM Series FT 451 Thermal Page-8 PS-1000-13 | Effective Date: Aug 29, 2024