Spiral Grilles

Spiral grilles are double deflection grilles made for mounting directly onto round duct, so you can supply or extract air straight from an exposed spiral duct run without boxing it in or adding a separate plenum. They are the neat solution for warehouses, gyms, bars, retail units and offices where the spiral ductwork is left on show as part of the interior.

Being double deflection, the grille has two sets of adjustable blades, letting you direct the air both horizontally and vertically after installation — useful for pushing supply air along or across the space as the layout demands. Seven stocked sizes cover common duties: 425mm and 525mm widths in heights of 75mm, 125mm and 225mm, plus a 625mm x 125mm size.

Stocked sizes are available for next-day delivery when ordered by 3pm. For flat-wall applications, see our standard double deflection grilles, or browse the full louvres and grilles range.