A modern bathroom with seamless extract air outlets

Gypsum Diffusers – Circle

Ventmann CIRCLE diffusers offer unparalleled versatility. Suitable for supply or extract, they are a stylish and functional addition to any room or interior design style.

Technical Information

A gypsum composite circular diffuser with a round face plate which attaches magnetically to the base.

Our CIRCLE diffuser is suitable for plasterboard ceilings or walls. Once installed, the diffuser forms a permanent bond with the plasterboard, offering outstanding durability. It can be sanded and painted just like the surrounding surfaces. It leaves no visible frames or flanges between the diffuser and the surrounding surface, making it ideal for very clean and modern interior design styles.

CIRCLE diffusers are designed to provide a radial air pattern with high entrainment and air mixing, resulting in a more comfortable environment for all occupants.

CIRCLE can be installed on its own or arranged into groups if required.

Available in 100/125/160/200/250mm connector diameters.

  • Materials: Gypsum composite body with industrial strength internal magnets, steel connector, rubber gasket and elastic fixing strap.
  • 45mm diffuser depth
  • Supply or extract
  • Suitable for short throw applications
  • Includes screws, fixing strap and plastic spacers
Installing a round Ventmann frameless diffuser
Step 1


Make a slot in the ceiling or wall and insert the diffuser, connecting it to the supply or extract duct. Fasten the diffuser into place with the screws provided.

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Seamless air diffuser installation
Step 2


Seal the gap around the edges and level off to create a smooth surface all around the diffuser, leaving no visible lines, gaps or joints.

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Paintable round diffuser
Step 3


Finish the ceiling or wall as planned. The diffuser can be painted in the same way – no need for special paints, primers or treatments.

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Seamless and frameless gypsum ceiling diffuser
Step 4


A stylishly frameless Ventmann diffuser.

An instant classic.

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Technical specifications & Installation guide

Ventmann diffusers are much more than an interior design solution: they are engineered to deliver comfortable airflow exactly where you need it most. For detailed technical specifications, download our full catalogue now.

Download tech specifications