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listed Fire-Resistance Diffusers * TVB - Thermal Vapor Blanket * Square collar
Center margins are mounted on the backside of the grille for a streamlined continuous look
Standard collar diameter is the same as the diffuser size
904 - Double Deflection Adjustable Aluminum Blade Grille For a 24" x 16" duct Opening (front blades parallel to shortest dimension)
Submittal and Performance Data
Opposed Blade Volume Damper 3000-0BD-70X52 Commercial listed Fire-Resistance Diffusers * TVBh3. 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.
