Square Perforated Fixed Swirl Diffusers (SWP) are suitable for Supply of Air with a large temperature differential, making these units ideal for Fan Coil Units, VAV and VRF Systems. The rotating supply air pattern provides a high degree of induction making these diffusers well suited to supply of both warm and cool air. For Extract/Return air applications internal Swirl element is not required, thus our PPD Perforated Grille is used.
SWP diffusers are manufactured from Galvanised Steel.
Standard finish is RAL9010 or polyester powder coated to the customers colour requirement.
Plenum boxes are accessories for use with Grilles and Diffusers. They are designed to equalise the pressure profile within the box and hence provide an even velocity at the face of the Grille or Diffuser without the use of Equalising Grids