4 Inch Grilles
All of our 4 inch 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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Circular Weather Louvre – 4 inch
£9.37 + VAT Add to basket -
Air Extract Valves – 4 inch
£6.65 + VAT Add to basket -
Air Extract Valves – Fire Rated – 4 inch
£33.48 + VAT Add to basket -
Air Supply Valves – 4 inch
£6.65 + VAT Add to basket -
Air Supply Valves – Fire Rated – 4 inch
£39.00 + VAT Add to basket -
Grille Box (Plenum Box) – 4 inch x 4 inch x 4 inch
£7.00 + VAT Choose Options -
Terlok Ring Leader® – 4 inch Diameter
£3.90 + VAT Add to basket -
Eggcrate Grille – 4 inch x 4 inch Neck (6 inch x 6 inch Face)
£10.60 + VAT Add to basket -
Grille Box (Plenum Box) – 5 inch x 5 inch x 4 inch
£7.60 + VAT Choose Options -
Grille Box (Plenum Box) – 6 inch x 6 inch x 4 inch
£7.60 + VAT Choose Options -
Grille Box (Plenum Box) – 8 inch x 8 inch x 4 inch
£9.10 + VAT Choose Options -
Grille Box (Plenum Box) – 10 inch x 10 inch x 4 inch
£9.80 + VAT Choose Options -
Grille Box (Plenum Box) – 12 inch x 12 inch x 4 inch
£11.50 + VAT Choose Options -
Grille Box (Plenum Box) – 14 inch x 14 inch x 4 inch
£12.50 + VAT Choose Options -
Grille Box (Plenum Box) – 16 inch x 16 inch x 4 inch
£12.50 + VAT Choose Options -
Grille Box (Plenum Box) – 18 inch x 18 inch x 4 inch
£13.00 + VAT Choose Options