DuctFix fixed blade swirl diffusers are constructed from mild steel and come with a compatible range of top and side entry plenum boxes. Volume control can be managed using Quadrant flap-type or Iris dampers on the plenum inlet spigots.

There are four swirl diamters sizes: 254, 356, 457, and 535mm in diameter. Each size is available in both square and circular faceplate configurations. The square designs also offer additional border styles to match popular ceiling grid designs. Standard fixing involves a central screw into a secondary bracket within the plenum box. The standard finish for the diffusers is Polyester Powder White, with other colors available upon request.

Plenum boxes sold separately