Janford Model AF-GI floor grille has been specifically designed for mounting in raised access floors in such area as computer rooms, where load and damage resistance are the utmost importance.
The Model AF-GI comprises of 6mm bars set straight on nominal 14mm pitch to handle maximum air volume and a strong steel holding frame for maximum strength and rigidity, the Model AF-GI can replace 600 x 600mm square floor titles to handle supply air or altenative extract air can be fitted with rear opposed blade damper assembly for air volume flow control.
FEATURES Frame and Blade : 6063 T5 aluminium extrusion from 1.1-8mm thickness with standard natural anodized finish.
Holding Frame : 25 x 6mm steel bar and 12mm dia. steel rod with fire retardant powder coating to BS476 part 6 & 7 in black color.
Opposed blade damper : 0,8mm thickness mild steel plate with fire retardant powder coating to BS 476 Part 6 and 7 in black color.
Finish : Other finish are available on request.

The Model AF-GI Floor Grilles has been independently tested to the performance specification : MOB PF2 PS 1992 "platform floors (Raised Access Floors ) performance specification." By TUV SUD PSB. Singapore and the ASHRAE 70-2006 Standard "Method of Testing for Rating the Performance of Air Outlets and Inlets" which incorporates ADC 1062 : GRD-84 Test Code for Grilles, Registers and Diffusers by Intertek, U.S.A (A Testing Organizations recognized by H.K. Government ).

How To Select When the AF-GI Floor Grille is used in an area with high heat loads, e.g. computer rooms, the grille should be located closed to the heat source but away from any wall or partition.

The recommended air volume per grille for a ceiling height of 3m is between 140 and 220 1/s. for higher ceilings the flow can be increased up to typically 300 Vs.

Test	Result
Stability of Deflection (Centre of grille) : 4,5 kN static load through 25mm square indentor	Deflection 23 hours after load applied - 3.48mm Deflection 24 hours after load applicd - 3.48mm Stability 0.00mm (MOB requirement Max. 0.02mm ) 2 hrs after load removed 0.04mm (MOB requirement Max. 0,75mm )
Impact load test : 40 kg Sand Bag from 1m height	Did not collapse
Rollingo load test:
3 kN load 50 passes of wheel	Did not collapse
2 kN load 50 passes of wheel	Parallel -l .13mm At right angle -0.04mm (MOB requirement Max, pennanent deformation -4mm vertically )
2 kN load 50 passes of wheel	Parallel -0.02mm At right angle -0,03mm (MOB requirement Max. permanent defomation -Imm horizontally )
Safety Load test: (Centre of grille) : 9 kN load through 25mm square indentor	Did not collapse

Supply air with open damper

	l/s
	150	240	330	420	500
Static Pressure (Pa)	0.25	1.74	2.24	3.98	7.22
Throw M	1.8	3	>3	>3	>3
Noise Criteria (NC)	<15	<15	<15	18	22

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Extract air with open damper

	l/s
	212	271	330	385	440	500
Static Pressure (Pa)	3	4	5	7	9	12
Noise Criteria (NC)	<20	<20	<20	<20	22	25

NC : The noise criteria ratings are based on a 10 dB room attenuation.
Throw is the perpendicular distance from grille face at which the velocity of the airstream has 0.5m/s.
SP is the static pressure loss
Use interpolator to determinate the performance of grille size not on the list.