Circular Weather Louvres

1 product

Circular weather louvres finish round ductwork at an outside wall, letting supply or exhaust air through while keeping out rain, leaves and birds. Our Systemair aluminium circular louvre has 35 degree slats with 14mm fin spacing and a stainless steel bird screen with an 8 x 8mm mesh, and comes in seven sizes from 100mm to 315mm to fit standard round duct. It plugs straight into the duct and fixes through the frame. For sizing help or larger openings, email hello@efans.co.uk or call 0161 399 3825.

Frequently asked questions

What is a circular weather louvre used for?

Terminating a round duct at an external wall. Typical uses are bathroom and kitchen extract fans, MVHR intake and exhaust, tumble dryer vents and plant room ventilation. The angled slats shed rain and the bird screen keeps birds and debris out of the duct.

What sizes do you stock?

Seven sizes to fit standard round duct: 100mm, 125mm, 150mm, 160mm, 200mm, 250mm and 315mm. Choose the size that matches the duct, because the louvre plugs directly into it.

Does it come with a bird mesh?

Yes. Every size has an integral stainless steel bird screen with an 8 x 8mm mesh.

Weather louvre or cowl?

A louvre sits almost flush on the wall and suits most wall terminations. A cowl projects from the wall or roof and deflects the air down or to the side, giving more protection on exposed elevations and roof outlets. See our roof and vent cowls.

Can circular louvres be used inside?

Yes, they are suitable for internal or external use, for example as a neat finish on an internal duct termination. On their own they do not provide a fire rating.

How do I fit and clean it?

Push the spigot into the duct and fix through the holes in the frame. To clean, wipe the outside with a damp cloth, and remove the louvre if you need to get into the duct.