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The Bard DAHV-30X10 is an OEM double deflection aluminum supply grille sized for a 30 inch by 10 inch duct opening, used on compatible Bard wall mounted HVAC applications where controlled discharge air direction is needed. Its two sets of adjustable blades let a technician dial in the throw pattern to reduce drafts and improve comfort, making it a practical replacement when the existing grille is damaged, bent, or no longer holds its blade settings. Use the Bard part number DAHV-30X10 to confirm the correct size and mounting style for your unit and grille opening before ordering.