|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||300||14||5.0||41,000||12|
Square Slotted Air Grilles
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.
Square Slotted Grilles
Square slotted cast iron grilles can be used for either drainage, as gutters or for ventilation.
If used for vents they can be fitted externally or internally and either built into walls (either brick or stone) to fit flush with the wall surface and secured in place with mortar or plaster.
We can also drill them so they can be screwed to the wall to fit over a hole or for added security were the grille is mounted flush with the brickwork.
- Channel Gratings (3)
- Cast Iron Air Bricks (25)
- Flyscreen Air Bricks (3)
- Hit & Miss Air Bricks (3)
- Louvre Air Bricks (3)
- Metric Air Bricks (4)
- Ducting & Wall Sleeves (14)
- Vent & Drainage Grilles (9)
- Round Slotted Grilles (2)
- Made to Measure Square Hole Grilles (1)
- Heritage Grilles (1)
- Long Gratings (7)
- Cast Iron Bearers (1)
- Doorstep Grilles (5)
- Cellar Vents (5)
- Period Vent Grilles (7)
- Coal Hole Covers (3)