300mm Grilles
What’s available in 300mm
Use this page to shop our grilles and diffusers by neck size: everything we sell in 300mm is gathered here, including ceiling grilles, wall grilles, plastic grille boxes and external louvres.
Alpha Air is a Leicester-based supplier of commercial and industrial ventilation equipment. Order stocked lines by 3pm and they ship for next-working-day delivery.
Alpha Air Ventilation Supplies is a Leicester-based supplier of commercial and industrial ventilation equipment, serving trade and business customers across the UK.
Showing 1–16 of 17 results
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Eggcrate Grille with Damper – 300mm x 300mm Neck (345mm x 345mm Face)
£41.60 + VAT Add to basket -
Square Weather Louvre – 300mm x 300mm
£22.56 + VAT Add to basket -
4-Way Ceiling Diffuser – 300mm x 300mm (Face size 450mm x 450mm)
£21.60 + VAT Add to basket -
4-Way Ceiling Diffuser – 300mm x 300mm (Face size 450mm x 450mm) – With Damper
£37.14 + VAT Add to basket -
Round Ceiling Diffuser (with Damper) – 300mm
£40.62 + VAT Add to basket -
Grille Box (Plenum Box) – 300mm x 300mm x 100mm
£11.50 + VAT Choose Options -
Grille Box (Plenum Box) – 300mm x 300mm x 150mm
£11.50 + VAT Choose Options -
Grille Box (Plenum Box) – 300mm x 300mm x 200mm
£11.50 + VAT Choose Options -
Grille Box (Plenum Box) – 300mm x 300mm x 250mm
£11.50 + VAT Choose Options -
Grille Box (Plenum Box) – 300mm x 300mm x 300mm
£11.50 + VAT Choose Options -
Single Deflection Grille – 300mm x 300mm Neck (345mm x 345mm Face)
£24.74 + VAT Add to basket -
Double Deflection Grille – 300mm x 300mm Neck (345mm x 345mm Face)
£34.29 + VAT Add to basket -
Eggcrate Grille – 300mm x 300mm Neck (345mm x 345mm Face)
£28.38 + VAT Add to basket -
Grille Box (Plenum Box) – 350mm x 350mm x 300mm
£12.50 + VAT Choose Options -
Grille Box (Plenum Box) – 400mm x 400mm x 300mm
£12.50 + VAT Choose Options -
Grille Box (Plenum Box) – 450mm x 450mm x 300mm
£13.00 + VAT Choose Options