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904 - Double Deflection Adjustable Aluminum Blade Grille For a 36" x 14" Duct Opening (front blades parallel to shortest dimension)
904 - Double Deflection Adjustable Aluminum Blade Grille For a 42" x 18" Duct Opening (front blades parallel to shortest dimension)
4-way reversible door on square sizes
with 75% free area Options 14 GA 304 SS Construction 12 GA (
½ × ½ × ½ Aluminum lattice
Parallel Blade Volume Damper 3000P-52X34 Smoke-Fire Damper 904 - Double Deflection Adjustableh3. Standard Features * 16 gauge galvanized channel frame * Parallel blades are cee stiffened 16 gauge galvanized for strength and stability * Blades pivot on non metallic celcon bushings * 1 2" square zinc plated steel pivot pins * 1 2" square zinc plated steel adjustable operating shaft extending up to 4" beyond the air control frame * Single blades on dampers with a height of 12" or less * Mill finish h3. Options * 3000 PLL Low Leak Air Control
