Standard Features * Gang-operated opposed blade radial volume control damper for use with RD Series Round Diffusers * Available in 2" increments from 6"-24"
Single deflection radius mount spiral pipe grille with adjustable blades
Free area equals more than 75% of nominal size
3 hour fire resistance rating
Extruded aluminum fixed bar blades at 45°
Architectural Lattice Grilles 1307-36x32 Finish:DarkBronze Standard Features * Gang-operated opposedStandard Features * 1" rim size (2" larger than nominal duct size) * 14 gauge steel * 1305: 1 2" lattice opening, 3 16" cross bars, 53% free area * 1306: 3 4" lattice opening, 1 4" cross bars, 57% free area * 1307: 13 16" lattice opening, 3 16? cross bars, 69% free area * 1308: 7 8" lattice opening, 1 4" cross bars, 60% free area * Soft White Options * Countersunk screwholes with matching Phillips #8 x 1 1 2" oval Screws * 10 or 12 gauge steel *