The CA821 Staggered Hole Perforated Grille offsets the CA820 Straight Hole grille, creating an embellished, yet simplistic, design—without compromising free air. This pattern is a  perfect choic for commercial, high-end residential, industrial and historic renovation projects. Available in three square sizes, 1/2”, 3/8” and 1/4”, the CA821 provides free air percentages of 35, 28 and 20 percent. With a variety of size variations, materials and finishes to choose from, Coco Architectural Grilles & Metalcraft can customize your grille to ensure your desired installation and embellishment specifications.

Popular options include: Our Exclusive L-Bead and L45-Bead Frame, Countersunk Mounting Holes, Welded Stiffener Bars or Support Boot, Welded Angles/Clips for Concealed Fastening, Access Door and Beveled Edges, Exact Border Specification, and Pattern Scaling.

Free Air Percentage