Shadowline Diffuser Round
Shadowline Diffuser Round
Shadowline Diffuser Round
Shadowline Diffuser Round
Shadowline Diffuser Round
Shadowline Diffuser Round
Shadowline Diffuser Round
Shadowline Diffuser Round
Shadowline Diffuser Round
Shadowline Diffuser Round
Shadowline Diffuser Round
Shadowline Diffuser Round

Shadowline Diffuser Round

1SLD260R

$198.00
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Application

The Shadowline Diffuser Round is a flangeless internal ceiling grille that sits flush with the ceiling, allowing air to be channelled through ventilation systems. The diffuser has a round profile with a centre panel that is ready for painting, resulting in a discreet finish that matches the ceiling. Designed in Australia by Expella, it has been engineered to optimise airflow and efficiency.


  Download Shadowline Diffuser Round fact sheet

Discreet 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 inline ventilation systems 

  • 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
  • Designed to optimise air flow and improve ventilation system efficiency
  • Manufactured from durable, non-corrosive and high-quality ABS plastic – an ideal material for channelling damp air
  • Low profile design for restricted ceiling space
  • Easy to install 
  • Low 148mm profile, ideal for restricted ceiling space
  • Acts as a service panel for system maintenance
  • Easy to clean, simply wipe with a damp cloth as required
  • Designed and engineered in Australia by Expella

Bathroom and laundry exhaust grilles for inline ventilation systems

  • Centre panel (round)
  • 150mm oval spigot
  • Round Base Plate with fixing lugs (x4)
  • Cable tie (x1),
  • Mounting tab (x1)
  • 20mm screws (x4)

It is recommended that installation of the Shadowline Diffuser Round is carried out by a qualified tradesperson, it is to be installed as part of an inline ventilation system. 

The Shadowline Diffuser Round requires a 265mm diameter circular ceiling cutout. It should be installed prior to the ceiling 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 performance and prevent the buildup of dust and debris.

5 year warranty from date of purchase. Refer to our warranty page for full warranty terms and conditions. 

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