SD - Universal Mount Spiral Duct Single & Double Deflection

TRUaire's SD 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 appearance. The curved saddle of these grilles is designed to follow the contour of round or spiral duct for a tight fit. These grilles come in either a 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
  • Galvanized saddle construction
  • 1/4' blade spacing
  • SD1 is single deflection with individually adjustable vertical blades
  • SD2 is double deflection with individually adjustable blades with vertical front blades
  • Pristine white or aluminum powder coat finishes
  • Optional scoop damper
  • Optional opposed blade damper

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Brand : TRUaire

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Grilles, Registers & Diffusers

TRUaire differentiates itself from competitors by meticulously manufacturing each component, painting them individually prior to assembling their grilles, registers and diffusers. Also known as the SmoothGlide technology, this process ensures that each product has 100% powder coat coverage and is highly resistant to corrosion and rattling. In contrast, many other registers on the market are painted after assembly, leading to flaking and corrosion when exposed to humidity.

TRUaire has created a full line of styles & models driven by distributor & contractor feedback


Perforated lay-in diffusers

Lay-in Diffusers & returns

Sidewall / Ceiling GRD’s

Spiral Duct GRD's

Supplemental Air Distribution

GRD Accessories

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