Performance Line Diffusers

£ 164.55 164.55 GBP £ 164.55

£ 164.55

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  • Slots
  • Length

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Performance Slot Diffusers

We are very proud that the Ventmann Performance Linear Slot Diffuser won the coveted reddot award 2023 showing how innovative this product is.  The curved inner faces of this grille allow the air to be directed either side of the unit and utilise the coanda effect causing the airflow to adhere to the surrounding ceiling or wall.  This allows a wide dispersal of air whilst reducing the perceptible airflow in the room.


  • Made from gypsum - a natural and durable material
  • Sleek, modern design
  • Coanda air flow
  • Available in a range of sizes and options
  • Easy to install and use
  • Adjustable airflow direction
  • Can be used on walls or ceilings
  • Ideal for home, offices and commercial spaces
  • Available in 3 lengths: 1250mm, 1000mm, 625mm
  • Available with 1, 2 or 3 slots


  • A linear diffuser can help provide a comfortable and healthy environment
  • Reduces noise levels
  • The plasterboard vent is the same material as its surrounding for seamless finish


  • Standard fixing of our slot diffusers is by use of a standard plasterboard jointing compound which can be sanded and painted.  On new-build sites, the plenum and diffusers are normally hung together and the plasterboard then cut and introduced to the face of the diffuser.  Further instructions to install the hidden linear diffuser can be found in the video link above.

Technical Parameters

(See separate images for supply and exhaust)


Our PLINE diffusers come complete with a deflector and the option of a perforated deflector.  The deflector can also be removed.   Each of these options is represented graphically opposite:


Slots 1 or 2 or 3
Length 625 or 1000 or 1250