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PMW-AD - Perforated Multistream Diffuser Current Range

High induction, draught-free side blow diffuser with manually adjustable multi-stream discharge direction, for installation in walls or bulkheads.

Volume flow rate range

  • 30 – 500 L/s (108 – 1800 m³/h)


  • 1.3 – 17 m

Nominal length

  • 0.6 m
  • 0.95 m
  • 1.5 m
  • Bespoke lengths ≤ 1.5 m available

Face height

  • 134 mm
  • 173 mm
  • 212 mm
  • 251 mm

Discharge height

  • 2.5 – 4 m


  • Highly inductive multi-stream discharge for draught-free comfort.
  • Multi-stream discharge direction manually adjustable via Allen key through diffuser face.
  • Allen key adjustment prevents inadvertent discharge direction adjustment (eg by cleaners).
  • Black plastic discharge elements (ABS, V0 fire rated) located behind the perforated discharge face break the airflow into a multitude of highly inductive individual air streams of differing discharge direction.
  • Adjustable air streams have four different discharge angles, with the outer angles flatter than inner ones, and each may be rotated to one of six discharge directions, ensuring highly inductive, broad dispersion of the supply air flow for draught-free air supply.
  • Perforated discharge face and frame of metal, painted to colour of choice.
View / Download PDF
View / Download PDF

Furnish and install SMARTEMP® Perforated Multistream Wall Adjustable Diffusers, type PMW-AD, or equivalent, consisting of:

Front face made of perforated metal, located in an aluminium mounting frame, both painted to the colour specified.

Adjustable nozzles (manually rotatable via an Allen key inserted through the front face) made of plastic, located upstream of the front face, that produce a multitude of high and low momentum air streams of differing discharge direction.

A galvanised perforated inlet plate located upstream of the nozzles.

Download: Selection Tool - (xls) (12/4/18)

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