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round collar only) * 830 OR - factory installed opposed radial damper (sizes 6"-14") * 830 FR - U
Standard Features * Return air T-Bar lay-in filter grille * Removable louvered 20 gauge steel face * 20" x 20"x 1" filter (not included) * 7/8" fiberglass back plenum cut holes 6"-16" (collar by others) * Seismic support holes * Soft White
955 Series Submittal
PERFORMANCE DATA FGAD Series Engineering/Performance Data
Volume Damper Low-Leak OBD 3000-0BDLL-28X14 Step Down Ceiling Diffuser round collar only) * 830h3. 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.
