TRUaire's SF series spiral duct supply grilles are designed to be installed directly on round or spiral duct, eliminating the need for costly register taps and offers a clean, low profile appearance. The curved frame of these grilles is designed to follow the contour of round or spiral duct and has a closed cell gasket for an air tight fit. These grilles come in either vertical single deflection or front vertical double deflection. Optional air scoop or optional aluminum opposed blade damper both have a screwdriver adjustment which is accessible through the face of the registers allowing for air balancing and uniform air flow.

• Aluminum construction
• SF1 is single deflection with individually adjustable vertical blades
• Foam gasket for air tight seal
• 1/4' blade spacing
• Pristine white or aluminum powder coat finishes
• Optional scoop damper
• Optional opposed blade damper