Eggcrate Grille – 450mm x 450mm Neck (495mm x 495mm Face)

Mostly for return and extract air in ceilings and walls. The open cube core gives a high free area with low resistance and a clean, modern appearance, which makes eggcrate the default choice wherever air needs to leave a room through a neat, unobtrusive terminal — offices, retail units and commercial spaces alike.

No — sizes are neck sizes, matching the duct or opening behind the grille. The overall face is 45mm larger on both axes, so a 300mm x 300mm neck grille has a 345mm x 345mm face. Measure the opening or the plenum box neck, not the visible face of an existing grille.

The integral opposed-blade damper mounts behind the eggcrate face and lets you balance or shut off the airflow at the grille itself during commissioning — no separate in-duct damper needed for simple systems. It is available in the same stock square sizes and as a custom-size product made to your exact neck dimensions.

Square sizes from 100mm x 100mm to 550mm x 550mm (150mm upwards for the damper version) are stock items with our fastest lead time. Anything else is covered by the custom-size products, made to order to any neck size from 100mm up to 1000mm on each axis — enter your width and height for an instant price.

Yes. Eggcrate grilles are symmetrical, so a 300mm x 600mm grille is the same product as a 600mm x 300mm one and prices identically either way round. Enter the dimensions in whichever orientation suits your opening. The grilles are aluminium, suitable for ceiling or wall mounting.