Noise control in ventilation
Why is it such an issue? In 1999 the WHO (World Health Organisation)…
Type EGO & Type EGOR
All eggcrate core extract grilles incorporate a 12.5mm2 aluminium eggcrate mesh for use where a high free area single side wall grille is required. They can be used in continuous line extract applications and also on supply air for air curtains and downward projections of warm air.
The units are available to completely replace tiles and are sized at 595 square overall to lay-in to the rear of the tile tee system. Also for hospital and clean area use eggcrates are available with removable or hinged cores to facilitate cleaning.
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SDO-DDO Selection Data
Air Volume m³/sec | Spigot Velocity m/sec | Grille Size width x height | Pressure Drop n/m² | Sound Rating nc |
---|---|---|---|---|
0.25 | 2.5 | 150x100 | 12 | - |
0.05 | 2.22 | 150x150 | 11 | - |
0.075 | 3.33 1.87 | 150x150 200x200 | 29 10 | 24 - |
0.10 | 4.75 2.50 2.00 | 200x150 200x200 250x200 | 33 16 11 | 30 18 12 |
0.15 | 4.75 2.4 3.0 | 200x200 250x200 250x250 | 33 12 19 | 32 13 22 |
0.20 | 4.74 3.2 2.66 | 250x200 250x250 300x250 | 34 21 17 | 33 24 20 |
0.25 | 4.00 2.77 3.12 | 300x250 300x300 400x200 | 29 21 25 | 30 24 27 |
0.30 | 4.75 3.33 3.42 | 300x250 300x300 350x250 | 34 27 31 | 34 28 30 |
0.40 | 3.26 3.20 2.96 | 350x350 500x250 900x150 | 27 26 21 | 28 28 25 |
0.5 | 3.12 3.03 2.77 3.0 | 400x400 550x300 900x200 450x450 | 23 23 20 20 | 26 26 22 25 |
0.6 | 3.0 2.66 3.50 | 500x400 750x300 450x450 | 20 17 27 | 25 23 34 |
0.7 | 3.50 3.11 | 500x400 750x300 | 27 24 | 34 31 |
0.8 | 3.2 2.85 3.33 | 500x500 700x400 800x300 | 26 16 26 | 34 22 34 |
0.9 | 4.0 3.5 2.7 2.0 | 500x500 600x500 600x600 750x600 | 28 22 12 7 | 36 30 24 20 |
1.0 | 3.0 2.75 2.25 2.25 | 600x600 750x600 750x750 900x600 | 20 15 10 11 | 30 24 20 22 |
All aluminium extruded frame with 12.5mm2 aluminium core with mitred corners all manufactured from HE9TF.
50mm increments from 100mm2.There are no limits on the overall sizes of eggcrates when used with jointing mullions.
Epoxy polyester powder coat from the RAL range of standard colours.
Hidden fixing by screwing to the duct with a removable core or screwed through face flange via N°6 or N°8
18mm long self tapping screws provided. Drop in cores, simply remove the lay-in tile and replace with the eggcrate grille.
We are able to offer a range of special shaped egg crate grilles including circular, triangular and trapezoid.
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