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Individually welded 14 guage diffusion bars
450 Series Submittal
Perforated Face Grille
Ceiling opening must be 4” larger in length and width than the nominal duct size
Opposed Blade Volume Damper 3000-0BD-24X36 past 12 months Individually welded 14 guage diffusionh3. Standard Features * Opposed blade operation for precise volume control * 16 gauge galvanized channel frame * Blades are vee 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.
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