Shadowline Diffuser AC Round installed in a white gyprocked ceiling
Front view of a Shadowline Diffuser AC Round
Side profile view of a Shadowline Diffuser AC Round
A minimalist bedroom interior with the Shadowline Diffuser AC Round installed in the ceiling, floor-length taupe linen curtains, a white ribbed pendant light, a beige plaster wall, light wood flooring, and part of a white bed visible
Shadowline Diffuser AC Round installed in a white gyprocked ceiling showing three centre panel adjustments
Cutaway view of an installed Shadowline Diffuser AC Round with insulated duct connected
Shadowline Diffuser AC Round installed in a white gyprocked ceiling
Front view of a Shadowline Diffuser AC Round
Side profile view of a Shadowline Diffuser AC Round
A minimalist bedroom interior with the Shadowline Diffuser AC Round installed in the ceiling, floor-length taupe linen curtains, a white ribbed pendant light, a beige plaster wall, light wood flooring, and part of a white bed visible
Shadowline Diffuser AC Round installed in a white gyprocked ceiling showing three centre panel adjustments
Cutaway view of an installed Shadowline Diffuser AC Round with insulated duct connected

Shadowline Diffuser AC Round

1SLD250ACR

$198.00
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Designed to integrate discreetly with contemporary interiors, the Shadowline Diffuser AC Round allows air to be channelled through air conditioning systems. This discreet, minimalist circular grille features a flangeless profile that sits flush with the ceiling, while the fine-textured centre panel can be painted to match surrounding surfaces for a clean, architectural finish.

Designed in Australia by Expella, it has been engineered to optimise airflow and efficiency with the centre panel adjustable according to the required air volume. This is the ideal air conditioning grille solution for the design-conscious.


  Download Shadowline Diffuser AC Round fact sheet

Discreet flangeless internal grille designed to be set into the ceiling for a streamlined surface

Centre panel that is ready to be painted to match the ceiling for a consistent finish

Suitable for use with ducted air conditioning systems 

  • A round interior grille, designed to channel air (supply and return air) through ducted air conditioning systems
  • Designed for optimal air conditioning air flow and efficiency
  • Flangeless design that sits flush with the ceiling once installed
  • Fine textured centre panel finish (resembling gyprock) that is ready for painting, to provide a finish that is consistent with the ceiling or wall
  • Adjustable centre panel for control over the diffuser’s aperture size and air flow  
  • Manufactured from durable, non-corrosive and high-quality ABS plastic – an ideal material for channeling conditioned air
  • Easy to install with unique easy fix clips
  • Low 148mm profile
  • Suitable for 10mm and 13mm gyprock
  • Easy to clean, simply wipe with a damp cloth as required
  • Designed and engineered in Australia by Expella. Design Registration –202518478

Air conditioning supply and return air grilles for ducted systems

  • Centre panel (Circle)
  • Round Base Plate with fixing lugs (x3)

The Shadowline Diffuser AC Round (1SLD1200ACP) is designed to be used as part of a ducted air conditioning system. It can be installed in the ceiling as a flangeless opening with vertical throw.

It is recommended that installation of the Shadowline Diffuser AC Round is carried out by a qualified tradesperson, it is to be installed as part of a ducted air conditioning system.

The Shadowline Diffuser Round requires a circular ceiling cutout (refer to dimensions drawing). The Shadowline Diffuser AC Round should be installed prior to the ceiling gyprock sheets being installed, as the plenum box is larger than the ceiling cut out.

Please check product specifications with your tradesperson before ordering.

Clean the grille as required with a damp cloth to maintain optimal system performance and prevent the build up of dust and debris.

5 year warranty from date of purchase. Refer to ourwarranty pagefor more information.

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