S P E C I F I C A T I O N S S U B J E C T T O C H A N G E

Te l : Sa les 01942 889555 I Web: www.grada.co.uk

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SUPPLY AND RETURN AIR GRILLESTYPE: AS/GS120 • AS/GS130

The grille type AS / GS is used for thesupply and exhaust of cooled orheated air in facilities such aswarehouses, workshops, commercialcentres, ...The grille can be mounted directlyon a circular duct.The vanes can be adjusted manu-ally and individually to obtain anoptimal air distribution.

Throw factor is based on a vR of 0,17 m/s in the occupied zone.See p. 1 160 for a detailed selection.Only for supply. For exhaust, see p. 1 160

Fast selection diagram

Application

Technical information

Installation dimensions

AS/GS120 AS/GS130

Characteristics:

• free passage ca. 70% (depen-ding on the position of the vanes)

• AS / GS 120: exhaust grille

• AS / GS 130: supply grille

• nom. L = 225-325-425-525-625-825-1025-1225 mmnom. H = 75-125-225-325 mm

Construction:

• AS : roll-formed aluminium sheet

• GS : roll-formed steel sheetBoth are phosphated andpainted in white (RAL 9010)

Nominal dimensions:L = nominal length (mm)H = nominal height (mm)All dimensions in mm

DimensionL x H (mm)

Throw LT (m)

NR

S P E C I F I C A T I O N S S U B J E C T T O C H A N G E

Te l : Sa les 01942 889555 I Web: www.grada.co.uk

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SUPPLY AN RETURN AIR GRILLESFRAME AND CORE OPTIONS

Accessories FixingSpecifications description• GT005 : inclined hit-and-miss damper

out of galvanised sheet steel, paintedblack

• GT006 : hit-and-miss damper out ofgalvanised steel sheet, paintedblack

Visible screw fixingExample:

Steel supply and exhaust grille withindividually adjustable vanes for moun-ting in circular ducts, equipped with aninclined damper.The grille is painted in white (RAL 9010)

Type: GS130 + GT005nom. dim. (LxH) ... x ... mm

How to order

GS130, dimension 625 x 125 mm, with hit-and-miss damper GT005

2:single row of vertical vanes3:vertical front vanes, horizontal back vanes

G: steelA : aluminium

HL

G S 1 3 5 - - 0 6 2 5 0 1 2 5

5:inclined hit-and-miss damper GT0056:hit-and-miss damper GT006

Fixing dimensions

Dimensions Duct Diam. (mm)

A

353535

414141

505050

555555

B

656565

717171

808080

858585

C

99108116

105114122

114123131

120129137

min.

160160160

315315315

630630630

900900900

max.

400400400

900900900

140014001400

240024002400

Nominal dimensions

L x H (mm)

425 x 75525 x 75625 x 75

425 x 125525 x 125625 x 125

425 x 225525 x 225625 x 225

425 x 325525 x 325625 x 325

S P E C I F I C A T I O N S S U B J E C T T O C H A N G E

Te l : Sa les 01942 889555 I Web: www.grada.co.uk

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GRILLE FOR CIRCULAR DUCTSTYPE: AS/GS120 • AS/GS130

AS/GS120 AS/GS130

AS/GS126 AS/GS135

Aluminium

AS120AS126AS130AS135

Steel

GS120GS126GS130GS135

Construction

Exhaust grille with single row of vertical vanesAS/GS120 with hit-and-miss damper GT006Supply grille with front row of vertical vanes and back row of horizontal vanesAS/GS130 with inclined hit-and-miss damper GT005

Possible deliveries

S P E C I F I C A T I O N S S U B J E C T T O C H A N G E

Te l : Sa les 01942 889555 I Web: www.grada.co.uk

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GRILLE FOR CIRCULAR DUCTSPERFORMANCE DATA TYPE: AS/GS120 • AS/GS130

Selection diagram - supply

Air flow rate measurementsupply-exhaust

Correction factors

Velometer jet 2220 A or 6070

- 0°deflection- With ceiling effect- Without damper

NOTE: noise level correctionwith damper: see pressureloss diagram

425

0,0150,0340,0690,102

525

0,0200,0440,0860,130

625

0,0240,0530,1020,148

L (mm)

H (mm)

75125225325

Throw correction factor LT without ceiling effect

Distance between ceiling and supply grille

0,9 m

Correction

LT x 0,75

Ak - values supply (m2)

S P E C I F I C A T I O N S S U B J E C T T O C H A N G E

Te l : Sa les 01942 889555 I Web: www.grada.co.uk

section3

GRILLE FOR CIRCULAR DUCTSPERFORMANCE DATA TYPE: AS/GS120 • AS/GS130

Pressure loss - supply

200

150

100

80

60

50

40

30

20

15

5

10

Pt (Pa)

1,5 2 2,5 3 3,5 4 5 6 7 8 9 10

vK (m/s)

vD

vk pt

NR

+ 3

5

NR

+ 2

5

NR

+ 1

5

NR

+ 0

25 %

50 %

100 %

G

S135

GS

130

D

Selection diagram - exhaust

NR 50

NR 35

NR 20

NR 25

NR 30

NR 40

NR 45

NR

+ 1

1

NR

+ 1

8

Example - exhaust- Exhaust air flow rate qv = 0,14 m3/s- Grille: GS126 625 x 125 mm- Air velocity vk = 4 m/s- Noise level NR 20- Total pressure loss with damper 100 % open: ∆pt = 6,5 Pa- Correction on noise level: NR 20 + 11 = NR 31

425

0,0120,0230,0440,066

525

0,0140,0290,0550,086

625

0,0170,0340,0660,096

L (mm)

H (mm)

75125225325

Ak - values exhaust (m2)