Linear Slot Diffusers



Polyaire Linear Slot Diffusers are an attractive alternative to the ceiling or high sidewall supply diffusers. Slot diffusers can be installed individually in set lengths or in a continuous line. They can also be installed in any type of ceiling application.

The modules are available with a 20mm Slot with the number of slots ranging from 1 to 8 slots and are further available as fixed or removable core. (Fixed Core - Model LSD-FC, Removable Core – LSD-RC.

The air pattern control is adjustable from the diffuser face and is achieved by means of an adjustable pattern control with each slot, enabling a full 180º air pattern adjustment. The suggested volume control should be from the main duct run take-off, or from a butterfly damper fitted to the inlet of the cushion head box.

Construction is from extruded aluminium and the recommended maximum length for each section is 3 metres. Standard finish is powder coat white while other finishes are available to suit the interior and architectural design requirements.

Fixed Core Linear Model LSD 
Sizes Available/Dimensions
20mm Slot
No of Slots Neck Size (mm) Overall Face Size (mm)
 1 45 80
 2 90 125
 3 132 167
 4 176 210
 5 222 257
 6 264 300
 7 306 341
 8 348 383









Non-standard size slot and neck widths are available upon request

Plaster-in type also available

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