British Products Made in British Foundries

Slot 4 Vent
Slot6 VentSlot8 Ventsquare-slottedSlot5 Venttower-of-londonSlot 7 ventSlot 4 VentSlot 9 Vent

Square Slotted Air Grilles

From: £35

Square Slotted Air Grilles available undrilled as standard with a painted black finish.

Can be fitted with the slots either horizontally or vertical although more often fitted horizontally, which allows for less rainwater access as the horizontal ribs act as louvres.

One of our most popular products installed in hundreds of properties across the UK and the world, although most notably in Tower of London, England

Drilling & mesh can be added for an additional cost, prices vary from £15 – £25 for mesh, and £5 – £10 for drilling depending on length.

Please see product specification & sizes in the table below.

Clear selection
Item Nom. Size (Inch) Size (mm) Vent Size (mm) Weight (kg) Air Flow (mm2) Plate Thickness (mm)
Slot 4 4 x 4 100 10 0.5 3,000 9
Slot 5 5 x 5 125 8 0.7 5,000 9
Slot 6 6 x 6 150 10 0.8 8,750 9
Slot 7 7 x 7 175 14 1.5 11,000 11
Slot 8 8 x 8 200 8 2 14,500 9
Slot 9 9 x 9 225 13 2.6 20,000 12
Slot 12 12 x 12 305 14 5.0 41,000 12