Internal Grilles

Expella internal grilles and diffusers are designed to blend discreetly into interior spaces while improving airflow performance. Award-winning designs help reduce turbulence, noise and system pressure, making them suitable for exhaust and supply air applications for ventilation and air conditioning.

    Filter
      Linear Bar Grille
      $90.00
      Linear Slot Grille
      from $155.00
      Round Ceiling Diffuser
      from $27.50
      Shadowline Diffuser Pro
      from $385.00
      Sold Out
      Shadowline Diffuser Round
      from $198.00
      Shadowline Diffuser Square
      from $198.00
      Shadowline Diffuser Squircle
      from $198.00
      Slimline Ceiling Diffuser Square
      $66.00

      Frequently Asked Questions about Internal Grilles

      Internal grilles by Expella are designed to channel air through interior spaces while improving airflow performance.

      They are designed to reduce turbulence, noise and system pressure, helping air move more effectively through the ventilation system.

      Yes, Expella internal grilles feature discreet, award-winning designs so that they blend seamlessly into interior spaces.

      Insulated internal grilles are intended for air conditioning applications, while uninsulated options are designed for ventilation systems.

      The internal grilles in this range are made from powder coated aluminium or ABS plastic, as shown in the collection filters.

      They are suitable for home renovators, trades including builders, plumbers and electricians installing residential ventilation or air distribution systems.

      Inspiration and advice from the experts

      Projects

      Alexander House by
      Alexander & Co

      Advice

      Getting started on home ventilation

      News

      Expella Wins Gold at Good Design Awards