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Allows for 4-way airflow adjustment
Square collar designed for a 20” × 20”
Square collar designed for 20” × 20” duct
Performance Data With Opposed Blade Damper
904 - Double Deflection Adjustable Aluminum Blade Grille For a 48" x 20" Duct Opening (front blades parallel to shortest dimension)
Architectural Lattice Grilles 1307-22x8 Finish:Tan Allows for 4-way airflow adjustmentStandard 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 *
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