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Shadowline Diffuser AC Round

Expella
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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.

2kg
$198
Details
General
  • Type of use
    Commercial and Residential
  • Care and cleaning
    Easy maintenance
  • Installation
    Professional installation recommended
  • Assembly
    No assembly required
Specifications
  • Product contents: Centre panel (Circle), Round Base Plate with fixing lugs (x3)
  • Material: ABS Plastic, textured finish to resemble gyprock
  • Compatible duct size (mm): 250mm
  • Design: Designed by Expella, Shadowline Diffuser AC Round Australian Design Registration –202518478
Scope of use

Air conditioning supply and return air grilles for ducted systems

Features
  • 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
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About the
Seller

Australian innovation and excellence in residential and commercial ventilation systems

Expella is an Australian business specialising in healthy, architectural and effective mechanical ventilation solutions.

Founded on good design principles and practicality, Expella’s approach means that homeowners, architects, designers and builders no longer need to settle for unattractive grilles, squashed ducting and underpowered fans.

With Expella’s range of architectural grille designs and airflow system solutions, you have function and form. And our systems are more than just beautiful; wherever possible, our designs reduce noise, increase airflow and make installation simpler and more secure.

Our approach is best exemplified by our world-first odourless toilet. Odourless by Expella is a self-contained ventilation system that runs inside the toilet cistern to send odours straight to the sewer. No more putting up with toilet odour travelling up from the bowl and around the room before it reaches a window or extractor fan.

Expella products have provided years of health and comfort in commercial buildings and more than 13,000 homes around Australia.

Verified ArchiPro Member1 year · Since 2025