Linear Slot Diffusers

£ 140.43 140.43 GBP £ 140.43

£ 140.43

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  • Slots
  • Length
  • Gap

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Slot Diffusers

The Ventmann Linear Slot Diffuser is a high-quality, versatile diffuser that can be used in a variety of applications. The frameless slot diffuser is made of durable materials and features a sleek, modern design. These linear grilles are easy to install and use, and each slot linear diffuser can be adjusted to provide a variety of airflow patterns.  The frameless slot diffuser can be used as a ceiling diffuser or a wall diffuser depending on your requirements.


  • A modern grille diffuser made of durable materials
  • Sleek, modern design of slotted diffuser
  • Available in a range of sizes and options
  • Easy to install and use
  • Adjustable airflow patterns
  • A linear slot diffuser that can be installed on walls or ceilings
  • Ideal for use in homes, offices, and commercial spaces
  • Available in three lengths: 1250mm, 1000mm, and 625mm
  • Available with two slot gaps: 12mm and 18mm
  • Available with 1, 2, or 3 slots


  • A linear diffuser grille can Improve air quality by providing a wider flow
  • The frameless linear diffuser can help provide a comfortable and healthy environment
  • Reduces noise levels
  • Increases energy efficiency
  • With upstream filtering, the plaster in linear slot diffuser can help to reduce allergens and pollutants in the air
  • The plasterboard vent is the same material as its surrounding for a seamless finish


Standard fixing of our slot diffusers is by use of a standard plasterboard jointing compound which can then be sanded and painted. On new-build sites, the plenum and diffuser 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 on the video option above.

Technical Parameters

See legend and footnotes for explanation.  Supply and exhaust figures are available on separate images. These charts are also available as downloads in the documents section above.


Slots 1 or 2 or 3
Length 625 or 1000 or 1250
Gap 12mm or 18mm