Spiral Duct Grille (SDG)

SDG Spiral Duct Grille

The SDG mounts directly onto circular spiral duct, removing the need for a separate branch or saddle. Its adjustable blades provide controlled air distribution in exposed-duct installations.

Specification

• Laser-cut galvanised-steel frame
• Single or double-bank adjustable blades
• Nominal opening widths: 225, 325, 425, 525, 625, 825 and 1225 mm
• Nominal opening heights: 85, 125, 175 and 225 mm

Contact DuctFix with the spiral-duct diameter, required opening size and single- or double-deflection requirement.

Choose the right Spiral Duct Grille (SDG)

Select by nominal neck size, airflow duty, mounting position and the required finish or damper option. Available options are grouped on this page so you can compare compatible sizes without searching through duplicate product pages.

Browse all grilles, diffusers and air valves or ask the DuctFix team for product-selection help.

Spiral Duct Grille (SDG) frequently asked questions

How do I choose the correct size and configuration?

Use the nominal neck or opening size and check the intended supply, return or extract duty. Contact DuctFix if you need help with airflow, throw, finish or damper selection.

Are other sizes or finishes available?

Availability depends on the product range. Where a required option is not listed, send DuctFix the model, opening size and application details for confirmation.

Lead time and delivery

Availability varies by size and specification. Stocked items can usually be dispatched promptly, while made-to-order items may require additional lead time. Delivery charges and available services are calculated at checkout. Contact DuctFix before ordering if your project has a fixed delivery date.