450mm Grilles
All of our 450mm grilles and diffusers in one place. The range takes in ceiling grilles, wall grilles, plastic grille boxes and external louvres. Every product listed here is made to the same neck size, so you can pick parts that fit first time.
Stocked items ordered before 3pm are dispatched for next-working-day delivery, and UK delivery is free on orders over £400 ex VAT.
For other sizes and styles, browse the full louvres and grilles range.
Showing 1–16 of 17 results
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Eggcrate Grille with Damper – 450mm x 450mm Neck (495mm x 495mm Face)
£62.65 + VAT Add to basket -
Square Weather Louvre – 450mm x 450mm
£43.64 + VAT Add to basket -
4-Way Ceiling Diffuser – 450mm x 450mm (Face size 595mm x 595mm)
£29.50 + VAT Add to basket -
4-Way Ceiling Diffuser – 450mm x 450mm (Face size 595mm x 595mm) – With Damper
£54.08 + VAT Add to basket -
Grille Box (Plenum Box) – 450mm x 450mm x 100mm
£13.00 + VAT Choose Options -
Grille Box (Plenum Box) – 450mm x 450mm x 150mm
£13.00 + VAT Choose Options -
Grille Box (Plenum Box) – 450mm x 450mm x 200mm
£13.00 + VAT Choose Options -
Grille Box (Plenum Box) – 450mm x 450mm x 250mm
£13.00 + VAT Choose Options -
Grille Box (Plenum Box) – 450mm x 450mm x 300mm
£13.00 + VAT Choose Options -
Grille Box (Plenum Box) – 450mm x 450mm x 315mm
£13.00 + VAT Choose Options -
Grille Box (Plenum Box) – 450mm x 450mm x 355mm
£13.00 + VAT Choose Options -
Grille Box (Plenum Box) – 450mm x 450mm x 400mm
£13.00 + VAT Choose Options -
Grille Box (Plenum Box) – 450mm x 450mm x 450mm
£13.00 + VAT Choose Options -
Single Deflection Grille – 450mm x 450mm Neck (495mm x 495mm Face)
£46.52 + VAT Add to basket -
Double Deflection Grille – 450mm x 450mm Neck (495mm x 495mm Face)
£59.99 + VAT Add to basket -
Eggcrate Grille – 450mm x 450mm Neck (495mm x 495mm Face)
£37.20 + VAT Add to basket