Non-Vision Transfer Grilles Single & Double Cores

Type DTG/WTG Core Only

This grille has been specifically designed for mounting in a heavy duty raised access floor, suitable for computer rooms or other areas where floor supply is advantageous.

Extensive testing by independent laboratories have certified that the grille is suitable for meeting the stringent point loading and safety factor requirements for these areas. The grille is also suitable as a general replacement for 600sq floor tiles where areas of heavy foot traffic and equipment would be experienced.

These are particularly suitable for doors to staircases etc. where air transfer is desirable but fire requirements must be met.

SDO-DDO Selection Data

Air Volume m3/sec Face Velocity 1m/sec Pressure Drop 10n/m2Face Velocity 1.25m/secPressure Drop 15n/m2Face Velocity 1.5m/sec
Pressure Drop 15n/m2
0.5300
400
X
X
200
150
400
250
X
X
125
200
200
300
X
X
200
150
0.075300
450
X
X
300
200
300
400
X
X
250
200
300
400
X
X
200
150
010450
550
X
X
250
200
450
300
X
X
200
300
300
400
X
X
250
200
0.125500
450
X
X
250
300
550
450
X
X
200
250
350
300
X
X
250
300
0.150600
500
X
X
300
350
600
500
X
X
250
300
450
400
X
X
250
300
0.150600
500
X
X
300
350
600
500
X
X
250
300
450
400
X
X
250
300
0.175450
500
X
X
450
400
550
600
X
X
300
350
400
450
X
X
350
300
0.20600
500
X
X
400
450
750
750
X
X
300
250
600
500
X
X
250
300
0.225500
650
X
X
500
400
600
500
X
X
350
400
450
600
X
X
400
300
0.25550
650
X
X
550
450
700
600
X
X
350
450
500
600
X
X
400
350

Manufactured from aluminium HE9TF extrusion, non-vision chevron blades are spaced at 12.5mm centres.

For specialised light application such as darkrooms, units with ‘W’ shaped cores i.e. two cores back-to-back can be supplied. These are therefore light tight and when painted black allow no spillage of light into the area.

In 50mm increments from 100mm2 up to 1200mm2. Intermediate sizes can also be manufactured.

Standard finish is white 9010 matt. Alternative colours such as silver 9006 or other RAL colours are available at extra cost.

Screw through flange using N°6 or N°8 18mm long self tapping screws.

Where these units are fitted into walls or blockwork it is possible to supply them with extended casing to seal off the cavity.

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