Product Selection Guide CURTAIN WALLS - PRODUCT COMPARISON YKK AP PRODUCT YHC 300 OG impact resistant and blast mitigating outside glazed curtain wall system EFCO KAWNEER Series 5600 21 /4 " Impact 1600 Impact (2-1/2 " Wide) 1630 SS IR (Screw Spline) YHC 300 SSG impact resistant and blast mitigating structural silicone glazed curtain wall system Series 5600 21 /4 " Impact 1600 Wall System™2 OLD CASTLE BUILDING ENVELOPE HR-250 StormMax® (Monolithic) StormWallTM HR-251 StormMax® (Insulating) HR-250 StormMax® (Monolithic) StormWallTM HR-251 StormMax® (Insulating) YHC 300 IG impact resistant and blast mitigating inside glazed curtain wall system - - - - XL XL US ALUMINUM Page-22 PS-1000-11 | Effective Date: May 31, 2023