Aluminium Circular Louvre -

CVCWL - Circular External Weather Louvre

Product Overview

Our circular external louvres offer a fantastic alternative to traditional square and rectangular louvres.

CVE Shop small diameter external louvres are designed for applications requiring a high free area external vent, perfect for bathroom extractor fans etc. 

When using circular ductwork or flex, the duct will connect directly over the louvre spigot without using a transition piece.

Manufactured from cast aluminium, the louvre is very robust and rattle free.

The circular weather louvre also offers excellent resistance to rain whilst maintaining a 50% free area.

The circular weather louvre can be fixed through the face into the substrate (supplied undrilled), or by using the two concealed holes in the rear spigot.

Size not listed?

If the size you require is intermediate to the sizes listed we advise taking the next size up.

All prices include VAT (where applicable)


Manufactured from cast aluminium featuring slimline blades on 20mm pitch. Rear vermin mesh constructed from galvanised steel.


The standard finish is Silver Aluminium. Should you require an alternative colour we can powder coat your circular louvre to match any RAL/BS colour required. For other colours we offer a paint matching service, simply submit your colour details or send a small sample and we will do the rest.


Air intake or discharge in domestic and commercial ventilation systems. Suitable for external use.

Integral Vermin Mesh

At the rear of the louvre blades is a 12.5mm x 12.5mm galvanised mesh screen to prevent the ingress of vermin or foreign objects.  

Optional insect mesh available.



All circular louvres are supplied with unpunched flanges but are suitable for face fixing or sidewall fixing into duct using the neck at the back of the louvre.

Spigot Diameter

-3mm smaller than listed diameter. E.G. CVCWL200 will connect to 200mm Dia duct with an actual spigot diameter of 197mm.

  • If the louvre is being installed into an external wall opening, the opening must have a minimum diameter of 200mm.
  • If face fixing the louvre, a maximum opening diameter of 210mm is advised.

Free Area 50%

Options & Accessories

  • Powder coated colour finish (RAL/BS)
  • Rolled steel wall sleeves
  • Insect mesh
  • Flanged rings (allows surface mounting)


Download PDF Download Data Sheet

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