tel 01484 861 233

Manufacturers of Air Diffusion Products Since 1969

Direct Mounted Grilles


Strong, durable and convenient

Recommended for use with circular and spiral ducting, with a diameter of 150mm diameter and above, our direct mounted grilles do not require grille boxes or shoes.

Benefits of FNW direct mounted grilles:

  • Fits straight onto spiral wound or circular ductwork - no need for grille boxes or shoes
  • Possible to turn air and balance volume - easy to push / pull, adjustable damperflector
  • Offers sideways spread air diffusion - individually adjustable vertical deflection louvres
  • Complete corrosion protection - zinc coated steel construction with polyester powder coating in black
  • Easy to attach – two fixing hole attachment, comes complete with foam sealing gasket and fixing screws
  • Range of sizes – 16 standard sizes to fit all circular ducting from 150mm diameter upwards
  • Bespoke products available - double deflection fixed louvre and eggcrate variants can be manufactured in larger sizes, both height and length

If you’d like to know more about FNW Engineering and our range of British made grilles and air diffusion products then call 01484 861233 or complete our online contact form.

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Made in England


ALL Air diffusion products supplied by FNW are manufactured at our West Yorkshire premises by our skilled staff and engineers.

Contact Us

FNW Engineering Developments Ltd.
New Street

Tel: 01484 861233 Fax: 01484 864928


FNW Engineering Developments Ltd - Tel: 01484 861 233 - Fax: 01484 864 928 - Copyright © FNW Engineering Developments Ltd