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904 - Double Deflection Adjustable Aluminum Blade Grille For a 34" x 18" Duct Opening (front blades parallel to shortest dimension)
904 Series Submittal
Ceiling opening must be 4” larger in length and width than the nominal duct size
Heavy Duty ConstructionMRI CompatibleInsect Screen
SUBMITTAL RS52 Series Submittal
Volume Damper Low-Leak OBD 3000-0BDLL-38X20 Residential Registers & Grilles 904 - Double Deflection Adjustableh3. 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.
