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Round Ceiling Diffuser Adjustable core – ARD


Frame and inner cones: High quality aluminium sheet as standard.
Damper frame and blades: Steel sheet with black matt finish.


Round Ceiling Diffuser – Adjustable Core

  • Frame and inner cones of round ceiling diffuser is made of high quality aluminium sheet construction with the advantages of corrosion resistance and rigidity.
  • Inner cones fixed centrally to the frame. Cones can be taken out by pushing inward, turn around and pull down. This provides easy installation, maintenance and access to the duct.
  • Radial, opposed blade damper is fixed to the frame by rivets. Damper can be operated by screw through diffuser face.
  • Foam gasket is sealed around the back of the frame as option to avoid air leakage.
  • Discharge pattern can be adjusted for horizontal flow by extending the cones and for vertical flow by retracting the cones.
  • Can be used for ceiling or exposed duct mounting especially in installation when an adjustable pattern is required.

Standard finishes:

  • Aluminium construction with white powder coated color finish (RAL 9010).
  • Steel construction with white powder coated finish (RAL9010)
  • Powder coated color finish as per other RAL color codes available as option.

Same as ARD, but with steel construction.

ARD N (mm) A (mm) B (mm) C (mm) D (mm)
150 150 342 412 12 75
200 200 392 462 12 75
250 250 490 580 12 93
300 300 540 630 12 93
350 350 590 680 12 93
400 400 640 730 10 93
450 450 690 780 10 93
500 500 740 830 10 93
600 600 1010 1120 10 113
  • N = Nominal size
  • All the dimensions are in mm.

Air pattern:
Horizontal air pattern

  • Pattern is obtained by extending the cones downwards.
  • This arrangement handles more capacity of air with increased induction and uniform air distribution.

Vertical air pattern

  • Pattern is obtained by retracting the cones upwards.
  • Air is delivered vertically without much induction.
  • Suitable for localized cooling in conditioned area and for higher altitudes


  • ARD: Concealed screw fixing from neck of the diffuser to the duct after removing internal cones.


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