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3-Way and 4-Way Air Patterns
904 - Double Deflection Adjustable Aluminum Blade Grille For a 14" x 12" Duct Opening (front blades parallel to shortest dimension)
Perforated face grille
Curved saddle with gasket provides airtight fit to spiral pipe
Parallel Volume Damper Low Leak 3000PLL-46X20 Smoke-Fire Damper 3-Way and 4-Way Air Patternsh3. 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
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