Wall and Ceiling Grilles - Swegon

Catalogue

Models SD, DD, EC, PG, G45, NVG,NB, GN, WB and GW

Wall and CeilingGrilles

[email protected]

Page

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 3

Model SD Single Deflection Grille and Model DD Double Deflection Grille . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Pages 4 – 11

Model EC Egg Crate Grille . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Pages 12 – 15

Model PG Perforated Grille . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 16

Model G45 45° Fixed Blade Grille . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Pages 17 – 19

Model NVG Non Vision Grille . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Pages 20 – 21

Model NB Narrow Blade Bar Grille . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 22

Model GN Narrow Blade Bar Grille . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 23

Model WB Wide Blade Bar Grille . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 24

Model GW Wide Blade Bar Grille . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 25

Models NB, GN, WB and GW Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . .Pages 26 – 28

Performance Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Pages 29 – 32

Installation Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Pages 33 – 34

Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 35

Product Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Pages 36 – 37

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Wall and C

eiling Grille

Contents

3 - Wall and

Ceiling Grille

IntroductionHaving successfullymanufactured grilles,registers and diffusers since1972, Air Diffusion hasthe product to satisfy almostevery wall or ceiling grilleapplication used inconventional air distributionor ventilation systems. Thecomprehensive range can beused in both supply orextract systems and includessingle and double deflectiongrilles, egg crate grilles,perforated core grilles, fixedblade grilles, non visiongrilles, and narrow or wideblade bar grilles.

Model SD Single Deflection Grille

Model WB Wide Blade Bar Grille

Model NB Narrow Blade Bar Grille

Model DDDouble Deflection Grille

Model EC Egg Crate Grille

Model PG Perforated Grille

Model G45 45° Fixed Blade Grille

Model NVG Non Vision Grille

DescriptionModel SD single deflection grilleincorporates a set of individuallyadjustable blades. The blades may beeither horizontal or vertical. The grille issuitable for sidewall, soffit or cillmounting and may be used for supply orextract applications. Typical installationsinclude offices, shops, hotels and mostcommercial or industrial buildings. Available as standard in white polyesterpowder coat finish. Other polyesterpowder coat finishes are also available asan option.Standard fixing is with No.8 countersunkheaded screws (BY OTHERS) usingprepared countersunk screw holes inflange. An optional opposed blade damper can befitted to the rear of the grille and adjustedthrough the grille core.

SpecificationMaterialExtruded aluminium sections.

Construction25mm wide flange frame with cornersmitred and welded. Adjustable blades are5mm wide, 21mm deep on a 20mm pitchand secured into the frame by starlockwashers and securing wire.

Installation MethodsF0– No fixing (fixing BY OTHERS).F1 – Countersunk Screw Holes in Flange(Standard).F2 – Spring Clips (not recommended forceiling or high sidewall installation). F4 – Rear strap (concealed behind grillecore) mating strap BY OTHERS.F6 – Rear strap and Mating “U” bracket(requires hemmed duct BY OTHERS). For Installation Guide see Page 33.

4

Wall and C

eiling Grille

Nom

inal

Siz

e =

Ope

ning

Siz

e

Cor

e si

ze =

Nom

inal

Siz

e –1

925

25

20

25

32 68.5

Opposed blade volume control damper

Overall Size = Nominal Size +45

Model SD Single Deflection Grille

AccessoriesAvailable fitted with opposed bladedamper adjusted through the grille core.

Finish0 – Mill extruded aluminium. (Mitred andcleated corners only).

2 – Silver (RAL9006) polyester powdercoat.

3 – White (RAL9010) 20% polyesterpowder coat (Standard).

4 – Black (RAL9005) polyester powdercoat.

6 – Special polyester powder coat finish.(Please state separately the RAL colourreference and finish type required).

Model Types

Model SDHG is supplied as a grille onlywith a single set of horizontal blades,along longest side.

Model SDVG is supplied as a grille onlywith a single set of vertical blades, alonglongest side.

Model SDHR is supplied as a grillehaving a single set of horizontal blades,along longest side and fitted with an OBD.

Model SDVR is supplied as a grillehaving a single set of vertical blades, alonglongest side, and fitted with an OBD.

DimensionsMinimum size is 100mm x 100mm up to amaximum single section of 1000mm x1000mm. Special sizes also available.

Model SD - No. 3 Finish Model SD - No. 2 Finish Model OBD

5 - Wall and

Ceiling Grille

Model DD Double Deflection Grille

DescriptionModel DD double deflection grilleincorporates two sets of individuallyadjustable blades. The front blades may beeither horizontal or vertical. The grille issuitable for sidewall, soffit or cillmounting and may be used for supply orextract applications. Typical installationsinclude offices, shops, hotels and mostcommercial or industrial buildings. Available as standard in white polyesterpowder coat finish. Other polyester powdercoat finishes are also available as an option.Standard fixing is with No.8 countersunkheaded screws (BY OTHERS) usingprepared countersunk screw holes inflange. An optional opposed blade damper can befitted to the rear of the grille and adjustedthrough the grille core.

Specification

MaterialExtruded aluminium sections.

Construction25mm wide flange frame with cornersmitred and welded. Adjustable blades are5mm wide, 21mm deep on a 20mm pitchand secured into the frame by starlockwashers and securing wire.

Installation MethodsF0– No fixing (fixing BY OTHERS).

F1 – Countersunk Screw Holes in Flange(Standard).

F2 – Spring Clips (not recommended forceiling or high sidewall installation).

F4 – Rear strap (concealed behind grillecore) mating strap BY OTHERS.

F6 – Rear strap and Mating “U” bracket(requires hemmed duct BY OTHERS).

For Installation Guide see Page 33.




3 – White (RAL9010) 20% polyesterpowder coat finish (Standard).


6 – Special polyester powder coat finish(Please state separately the RAL colourreference and finish type required).

Cor

e si

ze =

Nom

inal

Siz

e –1

925

25

Nom

inal

Siz

e =

Ope

ning

Siz

e

20

60


25

96.5 Overall Size = Nominal Size +45

Model Types

Model DDHG is supplied as a grille onlywith one set of front horizontal and oneset of rear vertical blades.

Model DDVG is supplied as a grille onlywith one set of front vertical and one setof rear horizontal blades.

Model DDHR is supplied as a grillehaving one set of front horizontal and oneset of rear vertical blades and fitted withan OBD.

Model DDVR is supplied as a grillehaving one set of front vertical blades andone set of rear horizontal blades and fittedwith an OBD.


Model DD - No. 3 Finish Model DD - No. 2 Finish Model OBD

6

Wall and C

eiling Grille

L

1.5

1.25

1.00.90.80.7

0.6

0.5

Curve X

Curve Y

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0.3

0.25

–14 –12 –10 – 8 –6 – 4 –2 0 2 4 6 8 10 12 14 16

Thr

ow

Fac

tor

(Cat

alog

ue th

row

x fa

ctor

= c

orre

cted

thro

w)

Temperature Difference C

Cooling – Heating+

The effect of temperature on vertical discharge

Model SD Single Deflection Grille andModel DD Double Deflection GrilleModel SD and DD Selection procedure

Grille Grille WidthHeight 150 200 250 300 350 400 450 500 550 600 700 800 900 1000100 .0084 .0117 .0150 .0182 .0215 .0247 .0280 .0312 .0344 .0377 .0442 .0507 .0572 .0637150 .0133 .0185 .0236 .0287 .0338 .0390 .0441 .0492 .0543 .0595 .0697 .0799 .0902 .1005200 .0182 .0252 .0322 .0392 .0462 .0532 .0602 .0672 .0742 .0812 .0952 .1092 .1232 .1372250 .0231 .0320 .0408 .0497 .0586 .0675 .0763 .0852 .0941 .1030 .1207 .1385 .1562 .1740300 .0280 .0387 .0494 .0602 .0710 .0817 .0925 .1032 .1140 .1247 .1462 .1677 .1892 .2107350 .0328 .0455 .0581 .0707 .0833 .0959 .1086 .1212 .1338 .1465 .1717 .1970 .2222 .2475400 .0377 .0522 .0667 .0812 .0957 .1102 .1247 .1392 .1537 .1682 .1972 .2262 .2552 .2842450 .0426 .0590 .0753 .0917 .1081 .1245 .1408 .1572 .1736 .1900 .2227 .2555 .2882 .3210500 .0475 .0657 .0840 .1022 .1205 .1387 .1570 .1752 .1935 .2117 .2482 .2847 .3212 .3577550 .0523 .0724 .0926 .1127 .1328 .1530 .1731 .1932 .2133 .2335 .2737 .3140 .3542 .3945600 .0572 .0792 .1012 .1232 .1452 .1672 .1892 .2112 .2332 .2552 .2992 .3432 .3872 .4312

Curve ReferenceX L = Up to 0.5mY L = More than 2.0m

1. Determine air volume flow rate per outlet.2. If a supply application, establish available throw –use SD/DD selection nomogram.3. Establish required maximum noise and pressurevalues – for exhaust use SD/DD selection nomogram.4. With a straight edge line across from the litres persecond value through values within the maximumparameters established to the pivot line.5. Retaining the position of intersection at the pivotline, pivot the straight edge until it meets acceptablevalues of size to its left and right.Note:The pivot line represents an area and by maintainingposition on this line widths and heights can be selectedof equal area. See note regarding effect of aspect ratioon throw for supply application.

Vertical discharging airstreams are affected bytemperature and the resulting density differencebetween the discharging air and ambient air. Throw isalso affected by the proximity of surfaces. Use theadjacent graph to provide a correction factor to applyto catalogue throws.

Note: The relative temperature values are based ondownward discharge – for upward discharge reverse theheating and cooling effect.

SDH Maximum Free Area – Blades at 0°

Grille Grille WidthHeight 150 200 250 300 350 400 450 500 550 600 700 800 900 1000100 .0082 .0112 .0142 .0172 .0202 .0232 .0262 .0292 .0322 .0352 .0412 .0472 .0532 .0592150 .0133 .0182 .0231 .0280 .0328 .0377 .0426 .0475 .0523 .0572 .0670 .0767 .0865 .0962200 .0185 .0252 .0320 .0387 .0455 .0522 .0590 .0657 .0724 .0792 .0927 .1062 .1197 .1332250 .0236 .0322 .0408 .0494 .0581 .0667 .0753 .0840 .0926 .1012 .1185 .1357 .1530 .1702300 .0287 .0392 .0497 .0602 .0707 .0812 .0917 .1022 .1127 .1232 .1442 .1652 .1862 .2072350 .0338 .0462 .0586 .0710 .0833 .0957 .1081 .1205 .1328 .1452 .1700 .1947 .2195 .2442400 .0390 .0532 .0675 .0817 .0959 .1102 .1245 .1387 .1530 .1672 .1957 .2242 .2527 .2812450 .0441 .0602 .0763 .0925 .1086 .1247 .1408 .1570 .1731 .1892 .2215 .2537 .2860 .3182500 .0492 .0672 .0852 .1032 .1212 .1392 .1572 .1752 .1932 .2112 .2472 .2832 .3192 .3552550 .0543 .0742 .0941 .1140 .1338 .1537 .1736 .1935 .2133 .2332 .2730 .3127 .3525 .3922600 .0595 .0812 .1030 .1247 .1465 .1682 .1900 .2117 .2335 .2552 .2987 .3422 .3857 .4292

SDV Maximum Free Area – Blades at 0°

7 - Wall and

Ceiling Grille

BLA

DE

SS

ET

AT22

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ET

AT0

BLADESSET

AT40

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Metres

Spread characteristics of deflection grilles

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tre

s

1 2 3 4 5 6 7

T

Model SD Single Deflection Grille andModel DD Double Deflection Grille

ThrowThrows shown in the catalogueare based on horizontaldischarge of cooled air withfull attachment of the jet to aflat ceiling close enough abovethe grille position to enablethis condition to occur. Formost cases for ceiling effectthe grille would be positionedno more than 300mm belowthe ceiling.

The catalogue gives figures forthrow at 0° and 40° bladedeflection being the full rangeof throw available. It is goodpractice to select for therequired throw at the midpoint of the range. In theexample on SD/DDnomogram the selection isideal for an available throw of6.5m.

Throws given are thehorizontal distance to aterminal velocity of 0.25m/s.

DropThe effect of drop with ceilingeffect and ceiling heights of2.6 – 500 litres per second peroutlet if correctly selectedshould not cause problems upto a cooling temperaturedifferential of 10 °C.

Free Space SupplyIn free space horizontaldischarge applications thedirection of the air will bedependant on the relativetemperature of the primary airto ambient. This can causeunsatisfactory conditioning ofoccupied zone and in somecases vertical discharge downor up walls is a more suitableapproach. (Please refer to thechart showing the effect oftemperature and surface tovertical discharge – fig 1).

Throw is reduced in free spacewhere there is no ceiling effector other surface proximity andreduction for isothermalconditions is 30% from thefigures given on the nomogram.

For primary air above or belowambient the throw measuredhorizontally is effected by themass and temperature – fig 3illustrates typical centre of jetair patterns at the same massand different temperatures.

SpreadThe spread of air at differentblade angles is given in fig 2.Spread can be used toestablish fixing centres formultiple outlets. It should beconsidered that if spread isrestricted by impingement ofadjacent air streams orobstructions the effectivespread will be reduced and thelength of throwproportionately increased.

Aspect RatioFrom all the points above it isclear that throw is a complexderived value and anotherfactor which has an effect isthe aspect ratio or proportionof the largest nominaldimension to the smallest.

Nomogram figures can betaken for aspect ratios from1:1 to 2:1 but if the aspectratio is greater then thefollowing factors can beapplied.

3:1 Reduce throw by 5%4:1 Reduce throw by 8%5:1 Reduce throw by 12%

Pressure LossThe total pressure losses givenare for grilles and dampersfitted with the damper fullyopen and blades at 0°. Forblades at 40° add 50% topressure values given althougha 10% reduction of the valuecan be taken for grilles withoutdampers.

Model SD and DD Selection Guide

Notes to selection data

Isothermal Throw

7

Throw at +5C or –5C

Throw at +10C or –10C

Sound LevelsWherever possible we give NRpower levels generated by theproduct. This enables theallowances for roomcharacteristics, surfacemounting and multiple outletsfrom the sound advice leafletto be taken into account andmore accurately predict thesound pressure measured inthe occupied space.

The NR power level given forSD/DD series grilles includesfor a fully open damper, forgrilles without dampers 2dBcan be subtracted, however, theeffect of partly closing thedamper for balancing purposescan add significantly togenerated noise.

8

Wall and C

eiling Grille

Model SD Single Deflection Grille Nomogram

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ESound power andpressure levels arebased on supply withdampers fully openand blades at 0°. For40° blade add 8dB. Please refer toselection procedurefor details.

9 - Wall and

Ceiling Grille

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N

Model DD Double Deflection Grille Nomogram

Sound power andpressure levels arebased on supply withdampers fully open. Please refer toselection procedurefor details.

10

Wall and C

eiling Grille

Quick Selection Performance TablesStandard Sizes: Models SDHG - SDHR

Nominal Size Performancew x h

150 x 150 Air Volume l/s 35 58 80 102 124 146 Neck Velocity m/s 2.0 3.2 4.5 5.8 7.0 8.2 Noise Level NR – 18 28 35 41 46 Pressure Loss Pa 6 17 33 54 79 110 Throw (0 deg) m 3.2 5.1 7.3 8.2 9.2 9.8


250 x 250 Air Volume l/s 98 159 221 282 344 405 Neck Velocity m/s 1.8 2.9 4.0 5.1 6.3 7.4 Noise Level NR – 20 29 37 43 48 Pressure Loss Pa 5 14 26 43 63 88 Throw (0 deg) M 4.5 6.3 8.5 11.5 13.2 14.3



400 x 400 Air Volume l/s 251 408 566 723 880 Neck Velocity m/s 1.7 2.7 3.8 4.8 5.9 Noise Level NR – 22 32 39 45 Pressure Loss Pa 5 12 23 38 56 Throw (0 deg) m 6.6 9.5 13.1 15.4 18.7


Performance Notes Throw values are based on grilles or registers mounted in thesidewall not more than one metre below an unrestrictedceiling. For grilles located more than one metre below theceiling, throw values should be reduced by approximately 25%.

Throw values are based on 10 °C cooling applications. ForIsothermal throws multiply by 1.25.

Terminal Velocities are based on 0.25 m/s.

Each NR value represents the noise rating curve which willnot be exceeded by the sound pressure in any of the octavebands, 125 Hz through to 4k Hz. Each NR value is based on aroom absorption of 10 dB, re 10 watts. Each NR value isfurther based on register operating at a 0 ° deflection. Settingsof 22.5 or 45 °, increase the stated sound levels by 1 or 7 NR,respectively. A dash (-) in space indicates an NR value less than10.

The NR level shown included for a grille with fully open obdfitted, a 2 dB reduction can be applied for grilles without anobd fitted. The effect of partly closing an obd for balancingpurposes will significantly add to generated noise.

The pressure loss shown is for a grille with fully open obdfitted and the blades set for 0 °. For blades at 40 ° a 50%addition should be applied. For grilles without an obd fitted a10% reduction to the value shown can be applied.

For other performance or selection details please contact thesales office.



250 x 250 Air Volume l/s 98 159 221 282 344 Neck Velocity m/s 1.8 2.9 4.0 5.1 6.3 Noise Level NR – 20 29 37 43 Pressure Loss Pa 5 14 26 43 63 Throw (0 deg) M 4.2 6.3 8.4 11.0 12.5





11 - Wall and

Ceiling Grille

Quick Selection Performance Tables Standard Sizes: Models DDHG - DDHR

Performance NotesThrow values are based on grilles or registers mounted in thesidewall not more than one metre below an unrestrictedceiling. For grilles located more than one metre below theceiling, throw values should be reduced by approximately 25%.

Throw values are based on 10 °C cooling applications. ForIsothermal throws multiply by 1.25.

Terminal Velocities are based on 0.25 m/s.

Each NR value represents the noise rating curve which willnot be exceeded by the sound pressure in any of the octavebands, 125 Hz through to 4k Hz. Each NR value is based on aroom absorption of 10 dB, re 10 watts. Each NR value isfurther based on register operating at a 0 ° deflection. Settingsof 22.5 or 45 °, increase the stated sound levels by 1 or 7 NR,respectively. A dash (-) in space indicates an NR value less than10.

The NR level shown included for a grille with fully open obdfitted, a 2 dB reduction can be applied for grilles without anobd fitted. The effect of partly closing an obd for balancingpurposes will significantly add to generated noise.

The pressure loss shown is for a grille with fully open obdfitted and the blades set for 0 °. For blades at 40 ° a 50%addition should be applied. For grilles without an obd fitted a10% reduction to the value shown can be applied.

For other performance or selection details please contact thesales office.


Overall Size = Nominal Size +4573.1

Opposedblade volumecontrol damper

Nom

inal

Siz

e =

Ope

ning

Siz

e

Cor

e S

ize

= N

omin

al S

ize

–19

mm

25 25

25

12.5

37.1

12

Wall and C

eiling Grille

Model EC Egg Crate Grilles

Construction25mm flange frame or 44mm wide flangewith corners mitred and welded. (44mmwide flange only suitable for fixed core).

The fixed core is located within the outerframe extrusion and retained in situ bythe flange frame.

The removable core is fitted into a “U”channel section and retained in the outerframe by securing screws (see drawing onpage17).

Installation MethodsF0 – No fixing (fixing BY OTHERS).

F1 – Countersunk Screw Holes in Flange(Standard).F2 – Spring Clips (not recommended forceiling or high sidewall installation).

F4 – Rear strap (concealed behind grillecore) mating strap BY OTHERS .



AccessoriesAvailable fitted with opposed bladedamper adjusted through the grille core.Finish0 – Mill extruded aluminium. (Mitredand cleated corners only).2 – Silver (RAL9006) polyester powdercoat.3 – White (RAL9010) 20% polyesterpowder coat (Standard).4 – Black (RAL9005) polyester powdercoat.6 – Special polyester powder coat finish.(Please state separately the RAL colourreference and finish type required).Model TypesModel ECG – is supplied as a grille onlywith a fixed core.Model ECG-RC – is supplied as a grilleonly with a removable core.Model ECR – is supplied as a grillehaving fixed core and fitted with an OBD.Model ECR-RC – is supplied as a grillehaving removable core and fitted with anOBD.DimensionsMinimum size is 100mm x 100mm up toa maximum single section of 1200mm x1200mm. Special sizes also available.

Model EC - No. 3 Finish Model EC - No. 2 Finish Model OBD

Fixed Core (25mm Flange)

DescriptionModel EC egg crate grille incorporates a12.5mm lattice style high free area corein either fixed or removable coreversions. The grille is suitable forsidewall, soffit or ceiling mounting and isnormally used for extract applications.Typical installations include offices,shops, hotels, restaurants, schools andmost commercial or industrial buildings.

Available as standard in white polyesterpowder coat finish. Other polyesterpowder coat finishes are also available asan option.

Standard fixing is with No. 8countersunk headed screws (BYOTHERS) using prepared countersunkscrew holes in flange.

An optional opposed blade damper canbe fitted to the rear of the grille andadjusted through the grille core.


36


72.5

25C

ore

Siz

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inal

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inal

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e =

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ore

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25

No. 6 x 11/4 Screw

No. 6 Screw Clip44

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ize

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ize

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e


Removable Core

Wide Flange

13 - Wall and

Ceiling Grille

14

Wall and C

eiling Grille

Model EC Egg Crate Grilles Nomogram: Exhaust

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LUM

E L

ITR

ES

/S

NR

LW

SO

UN

D P

OW

ER

LE

VE

L

TOTA

L P

RE

SS

UR

E P

a

DU

CT

VE

LOC

ITY

M/S

PIV

OT

LIN

E

SIZ

E -

MM

SIZ

E -

MM

11501200

Please refer toselectionprocedure fordetails.

15 - Wall and

Ceiling Grille

100 x 100 Air Volume l/s 20 30 40 50 60 70 80 Velocity m/s 2.0 2.5 3.2 3.8 4.5 5.5 6.2 Noise Level NR 10 20 25 27 30 35 40 Pressure Loss Pa 5 10 20 25 32 35 48

150 x 150 Air Volume l/s 40 50 60 70 80 90 100 Velocity m/s 1.5 1.75 2.3 2.75 3.0 3.5 3.9 Noise Level NR – 12 18 21 24 28 30 Pressure Loss Pa – 5 7 11 18 22 28

200 x 200 Air Volume l/s 60 70 80 90 100 150 200 Velocity m/s 1.5 1.75 1.9 2.2 2.4 3.0 4.1 Noise Level NR – 11 15 19 21 28 35 Pressure Loss Pa – – 5 6 8 19 29

250 x 250 Air Volume l/s 70 80 90 100 150 200 250 Velocity m/s 1.0 1.2 1.5 1.75 2.2 2.8 3.8 Noise Level NR – – 10 12 21 27 33 Pressure Loss Pa – – – 5 7 15 25

300 x 300 Air Volume l/s 80 90 100 150 200 250 300 Velocity m/s 0.75 0.9 1.1 1.5 2.1 2.8 3.2 Noise Level NR – – – 15 21 28 32 Pressure Loss Pa – – – – 7 13 21

350 x 350 Air Volume l/s 90 100 150 200 250 300 400 Velocity m/s 0.75 0.8 1.1 1.5 2.1 2.5 3.2 Noise Level NR – – – 15 21 27 32 Pressure Loss Pa – – – – 7 10 20

400 x 400 Air Volume l/s 100 150 200 250 300 400 500 Velocity m/s 0.6 0.8 1.1 1.75 2.0 2.6 3.0 Noise Level NR – – 10 18 22 28 33 Pressure Loss Pa – – – – 6 10 20



550 x 550 Air Volume l/s 250 300 400 500 600 700 800595 x 595 Velocity m/s 0.75 1.0 1.5 1.8 2.2 2.5 2.8Overall Noise Level NR – 11 18 23 26 28 33

Pressure Loss Pa – – – – 7 9 15

The tables are based on the grille being used for extract purposes.

The total pressure losses given are for the grille fitted with a fully opendamper. For grilles without dampers a 10% reduction may be applied.

The noise rating levels include for a grille fitted with a fully open damper.For grilles without dampers a 2 dB reduction may be applied. The effectof part closing a damper will significantly add to the noise rating levels.

A dash (–) in space indicates a noise ratings level lower than 10 NR.

Where a dash (–) in space is shown this indicates a Pressure Loss lessthan 5 Pa.

For other performance or selection details please contact the salesoffice.


Performance Notes

Quick Selection Performance TablesStandard Sizes: Models ECG - ECR

16

Wall and C

eiling Grille

Model PG Perforated Grille

DescriptionModel PG perforated core grilleincorporates a 50% free area steel meshcore in an aluminium flange frame. Thegrille is suitable for sidewall, soffit orceiling mounting and is used for extractapplications. Typical installations includeoffices, shops, hotels, restaurants,schools and most commercial orindustrial buildings.


Standard fixing is with No.8countersunk headed screws (BYOTHERS) using prepared countersunkscrew holes in flange.

An optional opposed blade damper canbe fitted to the rear of the grille andadjusted through a prepared hole in thegrille core.

Specification

MaterialExtruded aluminium sections with asteel core.

Construction25mm wide flange frame with cornersmitred and welded. The fixed perforatedsteel core is located within the outerframe extrusion and retained in situ bythe flange frame.


F1 – Countersunk Screw Holes inFlange (Standard).

F2 – Spring Clips (not recommendedfor ceiling or high sidewall installation).


Overall Size = Nominal Size + 4532

2525

Nom

inal

Siz

e =

Ope

ning

Siz

e

Cor

e S

ize

= N

omin

al S

ize

–19

AccessoriesAvailable fitted with opposed bladedamper adjusted through a preparedhole in the grille core.

Finish2 – Silver (RAL9006) polyester powdercoat



6 – Special polyester powder coat.(Please state separately the RAL colourreference and finish type).

Model Types

Model PG – is supplied as a grille onlywith a fixed core.

Model PGR – is supplied as a grillehaving fixed core and fitted with anOBD.

DimensionsMinimum size is 100mm x 100mm upto a maximum single section of1000mm x 1000mm. Special sizes alsoavailable.

Model PG - No. 3 Finish

17 - Wall and

Ceiling Grille

Model G45 Fixed Blade Grille

DescriptionModel G45 fixed blade grilleincorporates a set of 45° aluminiumblades, which can be provided in eithera one way or two way format. The grilleis suitable for sidewall, soffit or ceilingmounting and is normally used forextract applications. These grilles canalso be provided as a continuousassembly. Typical installations includeoffices, shops, hotels, restaurants,schools and most commercial orindustrial buildings.

Available as standard in white polyesterpowder coat finish. Other polyesterpowder coat finishes are also availableas an option.

Standard fixing is with No.8countersunk headed screws (BYOTHERS) using prepared countersunkscrew holes in flange.

An optional opposed blade damper canbe fitted to the rear of the grille andadjusted through a prepared hole in thegrille core.

Specification

MaterialExtruded aluminium sections

Construction25mm wide flange frame with cornersmitred and welded. The core uses a tubeand spacer alignment at a maximum of350mm centres and is secured into theframe with the tube passing througheach blade.


F1 – Countersunk Screw Holes inFlange (Standard).

F2 – Spring Clips (not recommendedfor ceiling or high sidewall installation).

F4 – Rear strap (concealed behindgrille core) mating strap BY OTHERS.



Overall Size = Nominal Size +4568.5

Cor

e S

ize

= N

omin

al S

ize

–19

2525

32

25

Nom

inal

Siz

e =

Ope

ning

Siz

e

Opposedblade volume control damper

Type G45RType G45G

AccessoriesAvailable fitted with opposed bladedamper adjusted through a preparedhole in the grille core.

Finish0 – Mill extruded aluminium. (Mitredand cleated corners only).




6 – Special polyester powder coat(Please state separately the RAL colourreference and finish type required).

Model Types

Model G45G – is supplied as a grilleonly with a 1 way fixed core.

Model G45R – is supplied as a grillehaving 1 way fixed core and fitted withan OBD.

Please state separately if a 2 way core isrequired.


Model G45 - No. 2 Finish

18

Wall and C

eiling Grille

Model G45 Fixed Blade GrillePerformance Guide

1. Determine air volume flow rate peroutlet.

2. Establish required maximum noiseand pressure values – refer to theappropriate nomogram.

3. With a straight edge line across fromthe litres per second value throughvalues within the maximum parametersestablished to the pivot line.

4. Retaining the position of intersectionat the pivot line, pivot the straight edgeuntil it meets acceptable values of size toits left and right.

Note:The pivot line represents an area and bymaintaining position on this line widthsand heights can be selected of equal area.See note regarding effect of aspect ratioon throw for supply applications.

Please refer to additional note in SD/DDsection with regard to air jetcharacteristics under various conditions.

Pressure LossThe total pressure losses given are forgrilles and dampers fitted with thedamper fully open. A 10% reduction ofthe value can be taken for grilles withoutdampers.

Sound LevelsWherever possible we give NR powerlevels generated by the product. Thisenables the allowances for roomcharacteristics, surface mounting andmultiple outlets from the sound adviceleaflet to be taken into account and moreaccurately predict the sound pressuremeasured in the occupied space.

The NR power level given for EC seriesgrilles includes for a fully open damper,for grilles without dampers 2dB can besubtracted, however, the effect of partlyclosing the damper for balancingpurposes can add significantly togenerated noise.

Selection Guide

Nom. Ht Nominal Width – mm

mm 150 200 250 300 350 400 500 600 700 800 900 1000

100 .0077 .0110 .0143 .0176 .0209 .0242 .0308 .0374 .0440 .0506 .0572 .0638

150 .0136 .0193 .0251 .0309 .0637 .0425 .0541 .0657 .0773 .0889 .1005 .1121

200 .0276 .0359 .0442 .0525 .0608 .0774 .0940 .1106 .1272 .1438 .1604

250 .0467 .0574 .0683 .0791 .1007 .1223 .1439 .1655 .1871 .2087

300 .0708 .0841 .0974 .1240 .1506 .1772 .2038 .2304 .2570

400 .1340 .1706 .2072 .2438 .2804 .3170 .3536

500 .2172 .2638 .3104 .3570 .4036 .4502

600 .3204 .3770 .4336 .4902 .5468

Core area (m2) – Preferred size

Free area factors:G45 = 0.45

Based on 300 x 300 nominal size the figures abovemay vary by 5% dependent on grille size.

3000

2500

2000

1500

1000

900

800

700

600

500

400

300

250

200

150

100

5

4

3

2

2.5

1

150

200

250

300

350

360

400

450

500

550

600

650

700

750

800

850

900

950

100010501100

110010501000950900

850

800

750

700

650

600

550

500

450

400

350

250

200

150

100

300

11501200

0.5

10

50

4030

20

10

5

60

70

40

50

30

20

10

100

90

80

70

60

50

40

30

20

VO

LUM

E L

ITR

ES

/S

NR

LW

SO

UN

D P

OW

ER

LE

VE

L

TOTA

L P

RE

SS

UR

E P

a

SIZ

E -

MM

SIZ

E -

MM

DU

CT

VE

LOC

ITY

M/S

PIV

OT

LIN

E

12001150 19

- Wall and

Ceiling Grille

Model G45 Fixed Blade Grille Nomogram: ExhaustPlease refer toselectionprocedure fordetails.

20

Wall and C

eiling Grille

25

Ove

rall

Siz

e =

Nom

inal

Siz

e +

58

25

25

Ove

rall

Siz

e =

Nom

inal

Siz

e +

58

2025

56 min80 max

25

25

2025

25

27 min54 max

25

Nom

inal

Siz

e =

Ope

ning

Siz

e

Ove

rall

Siz

e =

Nom

inal

Siz

e +

45

2025

27

Type NVG - DFType NVG - MFType NVG

Model NVG Non Vision Air Transfer Grille

DescriptionModel NVG non vision air transfer grilleincorporates a set of inverted vee sectionvanes to ensure a vision proof assembly. Amatching flange is available for eitherstandard or extra wide doors or partition.The grille is suitable for sidewall, door orpartition mounting and is normally usedfor extract or air transfer applications.Typical installations include offices,shops, hotels, restaurants, schools andmost commercial or industrial buildings.


Standard fixing is with No.8 countersunkheaded screws (BY OTHERS) usingprepared countersunk screw holes in flange.

SpecificationMaterialExtruded aluminium sections.Construction25mm wide flange frame with cornersmitred and welded. Overlapping inverted“v” aluminium sections are used for thevision proof core.


F1 – Countersunk Screw Holes in Flange(Standard).For Installation Guide see Page 33.

AccessoriesStandard matching flange for 27mm to54mm door/partition.

Deep matching flange for 56mm to 80mmdoor/partition.

Double core for light-proof applications.


2 – Silver (RAL9006) polyester powder coat.


4 – Black (RAL9005) polyester powder coat.

6 – Special polyester powder coat (Pleasestate separately the RAL colour referenceand finish type required).

Model Types

Model NVG – is supplied as a grille only.

Model NVG-MF – is supplied as a grillewith a standard matching flange.

Model NVG-DF – is supplied as a grillewith a deep matching flange.


Model NVG - No. 3 Finish Model NVG-MF - No. 2 Finish

21 - Wall and

Ceiling Grille

Model NVG Non Vision Air Transfer GrilleSelection Procedure

Typical selection of the most commonsizes are given in the table oppositealthough a full range of sizes isavailable.When transferring air into criticalspaces such as office it is good practiceto limit face velocities to about 1.0m/s.When transferring into non criticalspaces such as corridors, velocities canbe increased up to the maximum soundor pressure limits.

Nominal Face Total SoundSize Volume Velocity Pressure Powermm Litres/sec m/s Pa Level

200 x 200 20 0.5 4 10

30 0.75 7 14

40 1.00 10 17

50 1.25 14 22

60 1.5 20 26

70 1.75 26 31

300 x 300 45 0.5 4 10

68 1.75 7 18

90 1.00 10 23

113 1.25 14 27

135 1.5 19 30

158 1.75 25 34

450 x 300 68 0.5 4 13

100 0.75 7 18

135 1.00 10 24

170 1.25 14 30

200 1.5 19 33

236 1.75 25 37

450 x 450 100 0.5 4 14

150 0.75 7 21

200 1.00 10 26

250 1.25 14 32

300 1.5 19 36

350 1.75 25 40

22

Wall and C

eiling Grille

Model NB Narrow Blade Bar GrilleDescriptionModel NB narrow blade bar type grilleincorporates a 3.5mm wide blade on a12.5mm pitch. The blades are offered in 3separate deflection angles, 0°, 15° or 30°and may be either horizontal or vertical.The core assembly can be supplied eitherfixed or removable. Four frame sizes areavailable, 20mm, 25mm, 32mm and44mm. The grille is suitable for sidewall,soffit or cill mounting and may be usedfor supply or extract applications.Typicalinstallations include offices, shops, hotels,sports halls and most commercial orindustrial buildings.


Standard fixing for flange sizes 25mm,32mm and 44mm is with No. 6countersunk headed screws (BYOTHERS) using prepared countersunkscrew holes in the flange. For flange size20mm either secret fixing (F6) or springclip fixing (F2) is used. A total of 8alternative installation methods areavailable, although spring clip fixing (F2)is not recommended for high sidewall orceiling installation.

An optional opposed blade damper canbe fitted to the rear of the grille, which isadjusted through the grille core.

SpecificationMaterialExtruded aluminium sections.Construction20mm, 25mm, 32mm or 44mm wideflange frame with corners mitred andwelded. Fixed blades are 3.5mm wide on a12.5mm pitch and secured into the frameby 8mm tubular mullions on a maximumof 350mm centres. Installation MethodsF0 – No fixing (fixing BY OTHERS).F1 – Countersunk Screw Holes in Flange,Standard (25mm, 32mm & 44mm flange).

F2 – Spring Clips, (not recommended forceiling or high sidewall installation).



F8 – Ceiling Alignment Clip, details ofceiling type and clip to be provided.

F10 – Removable core, spring terry clip.

For Installation Guide see Pages 33/34.

Model 20W NB0 - 0° Deflection No. 2 Finish

Model 20W NB15 - 15° Deflection No. 3 Finish

Model 20W NB30 - 30° DeflectionNo. 2 Finish


Removable core, spring terry clip.

Finish

0 – Mill extruded aluminium. (Mitred andcleated corners only).




5 – Brushed (Linished) naturalaluminium face surfaces, 20mm and32mm frame only.

6 – Special polyester powder coat (Please state separately the RAL colourreference and finish type required).

Model Types

Model NB0-G is supplied as a grille onlywith 0° deflection, 3.5mm blades on12.5mm pitch.

Model NB15-G is supplied as a grilleonly with 15° deflection, 3.5mm blades on12.5mm pitch.

Model NB30-G is supplied as a grilleonly with 30° deflection, 3.5mm blades on12.5mm pitch.

A prefix of 20W, 25W, 32W or 44Wdetermines the flange width (ie. Modeltype 25W-NB15-G is a grille only with25mm wide flange and 15 ° deflectionblades).

For an opposed blade damper replace theletter ‘G’ with the letter ‘R’ (ie. Modeltype 25W-NB15-R is a grille having a25mm wide flange, 15 ° deflection bladesand fitted with an opposed blade damper).

DimensionsMinimum size is 100mm x 100mm up to amaximum single section of 1800mm x1200mm. Special sizes also available.See drawings on pages 26/27.

23 - Wall and

Ceiling Grille

Model GN Narrow Blade Bar Grille

DescriptionModel GN narrow blade bartype grille incorporates a3.5mm wide blade on a 19mmpitch. The blades are offered in3 separate deflection angles,0°, 15° or 30° and may beeither horizontal or vertical.The core assembly can besupplied either fixed orremovable. Four frame sizesare available, 20mm, 25mm,32mm and 44mm. The grille issuitable for sidewall, soffit orcill mounting and may be usedfor supply or extractapplications.Typicalinstallations include offices,shops, hotels, sports halls andmost commercial or industrialbuildings.

Available as standard in white

polyester powder coat finishOther polyester powder coatfinishes are also available as anoption.

Standard fixing for flange sizes25mm, 32mm and 44mm iswith No. 8 countersunk headedscrews (BY OTHERS) usingprepared countersunk screwholes in the flange. For flangesize 20mm either secret fixing(F6) or spring clip fixing (F2)is used. A total of 6 alternativeinstallation methods areavailable, although spring clipfixing (F2) is notrecommended for high sidewallor ceiling installation.

An optional opposed bladedamper can be fitted to the rearof the grille, which is adjustedthrough the grille core.


Construction20mm, 25mm, 32mm or44mm wide flange frame withcorners mitred and welded.Fixed blades are 3.5mm wideon a 19mm pitch and securedinto the frame by 8mmtubular mullions on amaximum of 350mm centres.

Installation Methods

F0 – No fixing (fixing BYOTHERS).

F1 - Countersunk Screw Holesin Flange, Standard (25mm,32mm and 44mm flange).

F2 – Spring Clips, Standard(20mm flange) (notrecommended for ceiling orhigh sidewall installation).

F4 – Rear strap (concealedbehind grille core) matingstrap BY OTHERS.

F6 – Rear strap and Mating“U” bracket (requireshemmed duct BY OTHERS).

F8 – Ceiling Alignment Clip,details of ceiling type and clipto be provided.

F10 – Removable core, springterry clip.

For Installation Guide seePages 33/34.

AccessoriesAvailable fitted with opposedblade damper adjustedthrough the grille core.

Removable core, spring terryclip.

Finish0 – Mill extruded aluminium.(Mitred and cleated cornersonly)

2 – Silver (RAL9006)polyester powder coat.

3 – White (RAL9010) 20%polyester powder coat(Standard).

4 – Black (RAL9005) polyesterpowder coat.

5 – Brushed (Linished) naturalaluminium face surfaces,20mm and 32mm frame only.

6 – Special polyester powdercoat finish (Please stateseparately the RAL colourreference and finish typerequired).

Model Types

Model GN0-G is supplied asa grille only with 0° deflection,3.5mm blades on 19mm pitch.

Model GN15-G is supplied asa grille only with 15°deflection, 3.5mm blades on19mm pitch.

Model GN30-G is suppliedas a grille only with 30°deflection, 3.5mm blades on19mm pitch.

A prefix of 20W, 25W, 32W or44W determines the flangewidth (i.e. Model type 25W-GN15-G is a grille only with25mm wide flange and 15 °deflection blades).

For an opposed blade damperreplace the letter ‘G’ with theletter ‘R’ (ie. Model type 25W-GN15-R is a grille having a25mm wide flange, 15 °deflection blades and fittedwith an opposed bladedamper).

DimensionsMinimum size is 100mm x100mm up to a maximumsingle section of 1800mm x1200mm. Special sizes alsoavailable.

Dimensions see drawings onpages 27 and 28.

Model 44W GN0 - 0° Deflection – No. 3 Finish, with corner detail.



24

Wall and C

eiling Grille

Model WB Wide Blade Bar Grille

Description

Model WB wide blade bar type grilleincorporates a 6.5mm wide blade on a14mm pitch. The blades are offered in 2separate deflection angles, 0° or 15° andmay be either horizontal or vertical. Thecore assembly can be supplied eitherfixed or removable. Four frame sizes areavailable, 20mm, 25mm, 32mm and44mm. The grille is suitable for sidewall,soffit or cill mounting and may be usedfor supply or extract applications.Typical installations include offices,shops, hotels, sports halls and mostcommercial or industrial buildings.

Available as standard in white polyesterpowder coat finish Other polyesterpowder coat finishes are also availableas an option.

Standard fixing for flange sizes 25mm,32mm and 44mm is with No. 8countersunk headed screws (BYOTHERS) using prepared countersunkscrew holes in the flange. For flangesize 20mm either secret fixing (F6) orspring clip fixing (F2) is used. A total of8 alternative installation methods areavailable, although spring clip fixing(F2) is not recommended for highsidewall or ceiling installation.

An optional opposed blade damper canbe fitted to the rear of the grille, whichis adjusted through the grille core.

Specification

MaterialExtruded aluminium sections

Construction20mm, 25mm, 32mm or 44mm wideflange frame with corners mitred andwelded. Fixed blades are 6.5mm wideon a 14mm pitch and secured into theframe by 8mm tubular mullions on amaximum of 350mm centres.

Installation Methods

F0 – No fixing (fixing BY OTHERS).

F1 – Countersunk Screw Holes inFlange, Standard (25mm, 32mm and44mm flange).

F2 – Spring Clips, Standard (20mmflange) (not recommended for ceiling orhigh sidewall installation).

F4 – Rear strap (concealed behindgrille core) mating strap BY OTHERS.

F6 – Rear strap and Mating “U” bracketrequires hemmed duct BY OTHERS).





Removable Core, spring terry clip.

Finish

0 – Mill extruded aluminium. (Mitredand cleated corners only).


3 – White (RAL9010) 20% glosspolyester powder coat. (Standard)


5 – Brushed (Linished) naturalaluminium face surfaces, 20mm and32mm frame only.

6 – Special polyester powder coat finish(Please state separately the RAL colourreference and finish type required).

Model Types

Model WB0-G is supplied as a grilleonly with 0° deflection, 6.5mm bladeson 14mm pitch.

Model WB15-G is supplied as a grilleonly with 15° deflection, 6.5mm bladeson 14mm pitch.

A prefix of 20W, 25W, 32W or 44Wdetermines the flange width (ie. Modeltype 25W-WB15-G is a grille only with25mm wide flange and 15 ° deflectionblades).

For an opposed blade damper replacethe letter ‘G’ with the letter ‘R’ (ie.Model type 25W-WB15-R is a grillehaving a 25mm wide flange, 15 °deflection blades and fitted with anopposed blade damper).


See drawings on pages 26/27.

Model 25W WB0 - 0° Deflection No. 3 Finish.



25 - Wall and

Ceiling Grille

Model GW Wide Blade Grille

DescriptionModel GW wide blade bar type grilleincorporates a 6.5mm wide blade on a19mm pitch. The blades are offered in 2separate deflection angles, 0° or 15° andmay be either horizontal or vertical. Thecore assembly can be supplied eitherfixed or removable. Four frame sizes areavailable, 20mm, 25mm, 32mm and44mm. The grille is suitable forsidewall, soffit or cill mounting and maybe used for supply or extractapplications. Typical installationsinclude offices, shops, hotels, sportshalls and most commercial or industrialbuildings.


Standard fixing for flange sizes 25mm,32mm and 44mm is with No. 8countersunk headed screws (BYOTHERS) using prepared countersunkscrew holes in the flange. For flangesize 20mm either secret fixing (F6) orspring clip fixing (F2) is used. A total of8 alternative installation methods areavailable, although spring clip fixing(F2) is not recommended for highsidewall or ceiling installation.

An optional opposed blade damper canbe fitted to the rear of the grille, whichis adjusted through the grille core.


Construction20mm, 25mm, 32mm or44mm wideflange frame with corners mitred andwelded. Fixed blades are 6.5mm wide ona 19mm pitch and secured into theframe by 8mm tubular mullions on amaximum of 350mm centres.


F1 – Countersunk Screw Holes inFlange, Standard (25mm, 32mm &44mm flange).

F2 – Spring Clips, Standard (20mmflange) (not recommended for ceiling orhigh sidewall installation).







Removable Core.

Finish0 – Mill extruded aluminium. (Mitredand cleated corners only).


3 – White (RAL9010) 20% glosspolyester powder coat (Standard).


5 – Brushed (Linished) naturalaluminium face surfaces. 32mm frameonly.

6 – Special polyester powder coat finish.(Please state separately the RAL colourreference and finish type required).

Model TypesModel GW0-G is supplied as a grilleonly with 0° deflection, 6.5mm bladeson 19mm pitch.

Model GW15-G is supplied as a grilleonly with 15° deflection, 6.5mm bladeson 19mm pitch.

A prefix of 20W, 25W, 32W or 44Wdetermines the flange width (ie. Modeltype 25W-GW15-G is a grille only with25mm wide flange and 15 ° deflectionblades).

For an opposed blade damper replacethe letter ‘G’ with the letter ‘R’ (ie.Model type 25W-GW15-R is a grillehaving a 25mm wide flange, 15 °deflection blades and fitted with anopposed blade damper).


Model 25W GW0 - 0° Deflection No. 3 Finish.

Model 44W GW15 - 15° DeflectionNo. 2 Finish.

26

Wall and C

eiling Grille

Dimensions20mm Border Not available with Flange Fixing Holes

25mm Border

36.5mm 72.5mm

Nom

inal

Siz

e =

Ope

ning

Siz

e

20W - NB0 - G 20W - NB15-R 20W - NB30-G 20W - WB0-R 20W - WB15-G

Cor

e S

ize

=N

omin

al –

19



20m

m20

mm

25m

m25

mm

74.5mm

25W - NB15-R 25W - NB30-G 25W - WB0-R 25W - WB15-G

Nom

inal

Siz

e =

Ope

ning

Siz

e

Cor

e S

ize

=N

omin

al –

19



38.5mm

25W - NB0 - G

27 - Wall and

Ceiling Grille

Ove

rall

Siz

e =

Nom

inal

Siz

e +

45

Cor

e S

ize

= N

omin

al S

ize

–19

2525

19

Ove

rall

Siz

e =

Nom

inal

Siz

e +

45

Cor

e S

ize

= N

omin

al S

ize

–19

2525

38.5 74.5

19

OpposedVolumeControlDamper

Nom

inal

Siz

e =

Ope

ning

Siz

e

Nom

inal

Siz

e =

Ope

ning

Siz

e

25W GNO - G 25W GNO - R

25mm Border Model GN

Dimensions

36.5mm32

mm

32m

m72.5mm

32W - NB0 - G 32W- NB15-R 32W - NB30-G 32W - WB0-G 32W - WB15-G

Nom

inal

Siz

e =

Ope

ning

Siz

e

Cor

e S

ize

=N

omin

al –

19



32mm Border

28

Wall and C

eiling Grille

Dimensions

4419

Ove

rall

Siz

e =

No

min

al S

ize

+8

3

75.5

44W - GN0 - R

4419

Ove

rall

Siz

e =

Nom

inal

Siz

e +

83

38.5

44W - GN0 - G

Co

re S

ize

= N

om

inal

Siz

e –

19

Co

re S

ize

= N

om

inal

Siz

e –

19

44mm Wide Border Model GN

29 - Wall and

Ceiling Grille

1. Determine air volume flow rate per outlet.

2. If a supply application, establish available throw – use Selection Nomogram.

3. Establish required maximum noise and pressure values for exhaust - use Selection Nomogram

4.With a straight edge line across from the litres per second value through values within the maximum parameters established to the pivot line.

5. Retaining the position of intersection at the pivot line, pivot the straight edge until it meets acceptable values of size to its left and right.

Note:The pivot line represents anarea and by maintainingposition on this line, widthsand heights can be selected ofequal area. See note regardingeffect of aspect ratio on throwfor supply applications.

Free Space SupplyIn free space horizontaldischarge applications, thedirection of the air will bedependant on the relativetemperature of the primary airto ambient. This can causeunsatisfactory conditioning ofthe occupied zone and in somecases vertical discharge downor up walls is a more suitableapproach. (Please refer to thechart showing the effect oftemperature and surface tovertical discharge. Fig.1).Throw is reduced in free spacewhere there is no ceiling effector other surface proximity andthe reduction for isothermalconditions is 30% from thefigures given on thenomogram. For primary air above or belowambient the throw measuredhorizontally is affected by themass and temperature. Fig. 2illustrates typical centre of jetair patterns, at the same massand different temperatures.

Aspect RatioFrom the points above it isclear that throw is a complexderived value and anotherfactor which has an effect is theaspect ratio or proportion ofthe largest nominal dimensionto the smallest.

Nomogram figures can betaken for aspect ratios from 1:1to 2:1 but if the aspect ratio isgreater, then the followingfactors can be applied:

3:1 Reduce throw by 5% 4:1 Reduce throw by 8% 5:1 Reduce throw by 12%

Fig. 1

Vertically dischargingairstreams are affected bytemperature and the resultingdensity difference between thedischarging air and ambient air.Throw is also affected by theproximity of surfaces. Use thegraph opposite to provide acorrection factor to apply tocatalogue throws.

Note:The relative temperature valuesare based on downward discharge - for upward discharge reverse the heating and cooling effect.

Performance Guide Jet Characteristics

L

1.5

1.25

1.00.90.80.7

0.6

0.5

0.4

0.3

0.25

Thr

ow

Fac

tor

(Cat

alog

ue th

row

x fa

ctor

= c

orre

cted

thro

w)

–14 –12 –10 – 8 –6 – 4 –2 0 2 4 6 8 10 12 14 16

Temperature Difference C

Cooling – Heating+

Curve X

Curve Y

L

The Effect of Temperature on Vertical Discharge

Isothermal Throw

Throw at +10 C or –10 C

Throw at +5 C or – 5 C

The Effect of Temperature on Free Space JetsTemperatures are in relation to space ambient

Curve ReferenceX L = Up to 0.5mY L = More than 2.0m

30

Wall and C

eiling Grille

1. Determine air volume flow rate per outlet.

2. If GNO or GWO supply application, establish available throw.

3.Establish require maximum noise and pressure values - refer to the appropriate nomogram.

4.With a straight edge line across from the litres per second value through values within the maximum parameters established to the pivot line.

5.Retaining the position of intersection at the pivot line, pivot the straight edge until it meets acceptable values of size to its left and right.

Note:The pivot line represents an area and bymaintaining position on this line widthsand heights can be selected of equal area.See note regarding effect of aspect ratioon throw for supply applications.

Please refer to additional note on Page 1regarding air jet characteristics undervarious conditions.

ThrowThrows shown in the catalogueare based on horizontal discharge ofcooled air with full attachment ofthe jet to a flat ceiling close enoughabove the grille position to enablethis condition to occur. For mostcases for ceiling effect the grillewould be positioned no more than300mm below the ceiling.

Core area (m2) - Preferred Sizes

Height Nominal Width - mm mm 150 200 250 300 350 400 500 600 700 800 900 1000 100 .0077 .0110 .0143 .0176 .0209 .0242 .0308 .0374 .0440 .0506 .0572 .0638 150 .0136 .0193 .0251 .0309 .0367 .0425 .0541 .0657 .0773 .0889 .1005 .1121 200 .0276 .0359 .0442 .0525 .0608 .0774 .0940 .1106 .1272 .1438 .1604 250 .0467 .0574 .0683 .0791 .1007 .1223 .1439 .1655 .1871 .2087 300 .0708 .0841 .0974 .1240 .1506 .1772 .2038 .2304 .2570 400 .1340 .1706 .2072 .2438 .2804 .3170 .3536 500 .2172 .2638 .3104 .3570 .4036 .4502 600 .3204 .3770 .4336 .4902 .5468

Pressure LossThe total pressure losses given arefor grilles with dampers fitted withthe dampers fully open. A 10%reduction of the value can be takenfor grilles without dampers.

Sound LevelsWherever possible we give NRpower levels generated by theproduct. This enables the allowancesfor room characteristics, surfacemounting and multiple outlets fromthe sound advice leaflet to be takeninto account and more accuratelypredict the sound pressure measuredin the occupied space.

The NR power level given includesfor a fully open damper. For grilleswithout dampers 2dB can besubtracted. However, the effect ofpartly closing the damper forbalancing purposes can addsignificantly to generated noise.

Free Area Factors:GNO = 0.85GWO = 0.70Based on 300 x 300 nominal size, the figures above may vary by 5% dependent on grille size.

Performance GuideSelection Procedure Notes to Selection Data

Nominal

31 - Wall and

Ceiling Grille

1500

1200

1000

900

800

700

600

500

400

300

250

200

150

100

50

40

30

20

20

15

10

9

8

7

6

5

4

3

2

15

10

9

8

7

6

5

4

3

2

1

40

50

75

100

125

150

175

200

225

250

275

300

350

400

Values shown are forModel WB. For NB applycorrection factors asshown.

55

50

45

40

35

30

25

20

5

4

3

2

1.5

1

0.5

0.25

50

30

20

10

5

All values include for fittedopposed blade dampers.

Throw based on 10° cooling toterminal velocity of 0.25m/s.

Side wall throw assumes flatceiling not more than 0.5m abovegrille centre line.

VOLUME Litres s/m

SIDEWALL

FLOOR TO CILL

THROW m

SOUND POWER LEVEL NR LW

DUCT VELOCITY m/s

TOTAL PRESSURE Pa

SIZE mm

Models NB, WB – Nomogram

NB Correction FactorsThrowx 0.8

Sound Power– 2dB

Pressure Levelx 0.8

32

Wall and C

eiling Grille

Sound power andpressure levels arebased on GNO withdampers fully open. For GWO refer totable. Refer toselection procedurefor details.

3000

2500

2000

1500

1000

900

800

700

600

500

400

300

250

200

150

100

90

80

70

60

50

40

30

20

20

15

10

9

8

7

6

5

4

3

2

50

40

30

20

10

50

40

30

20

10

5

10

5

4

3

2

1

0.5

150

200

250

300

350

400

450

500

550

600

650

700

750

800

850

900

950

1000

1050

1100

1150

1200

100

150

200

250

300

350

400

450

500

550

600

650

700

750

800

850

900

950

1000

1050

1100

1150

1200

VOLUME - Litres/s

THROW METRES 10°C Cooling

NR LW SOUND POWER LEVEL

TOTAL PRESSURE Pa (+50% 40° Deflection)

DUCT VELOCITY m/s

SIZE - mm

PIVOT LINE

SIZE - mm

GWO CorrectionFactors

Sound Power Levels+5dB

Pressure Levels+20%

Throw+20%

Models GNO and GWO Nomogram

33 - Wall and

Ceiling Grille

12

Mating strap by others

Rear strap fitted to grille

Mating strap by others

Rear strap fitted to grille

Type F1Standard face countersunk holes for screw fixing.

Type F2Optional spring clips.

Note:For satisfactory fixing require accurately formedopening or duct with firm sides. Not suitable forceiling or high sidewall installation.

Type F4Optional rear strap.

Note:Mating strap by others.

Type F6Optional rear strap plus mating ‘U’ bracket.

Note:Hemmed duct by others or plenums by us.

Installation Guide

Type F8 - Ceiling Alignment Clip Fixing(Details of ceiling system and clip to be supplied).

34

Wall and C

eiling Grille

36.5

34.9

532

Terry clips

Terry clips

Terry clips

Side ViewTypical Clip Arrangement



Model 32W - NB30G - RC

36.5

5

Nom

inal

Siz

e

Core secured to matingstrap via PullsertM3.5 screw fixing(can be one off in centredepending on width)

Mating straps - 19mm x 3.2mm Flat Bar

Ove

rall

Siz

e =

Nom

inal

+45

Mullion

30 Narrow Blade

3212

.5 c

rs

Removable Core DetailsType F10 Spring Terry Clip Arrangement. Suitable for use with Models NB, GN, WB and GW

Pullsert Arrangements. Suitable for use with models NB, GN, WB and GW

Flange Style Model Damper Fixing Finish Size

25W ECG R F0 3

35 - Wall and

Ceiling Grille

20W – 20mmflat surfaceflange havingmitred andwelded corners.

20C – 20mmflat surfaceflange havingmitred andmechanicallycleatedcorners.


25C - 25mmflat surfaceflange havingmitred andmechanicallycleated corners.


44W – 44mmwide flatsurface flangehaving mitredand weldedcorners, notavailable onSDH / DDH /NVG.

Ordering InformationExample

G – Grille only.

R – Grille with OBDfitted.

Width xHeight

F0 – No fixing(fixing BYOTHERS).

F1 - CountersunkScrew Holes inFlange (Standard).

F2 - Spring Clips(not recommendedfor ceiling or highsidewall installation).

F4 – Rear strap(concealed behindgrille core) matingstrap BY OTHERS.

F6 – Rear strap andMating ‘U’ bracket(requires hemmedduct BY OTHERS).

F8 – Ceilingalignment clip.(Note: details ofceiling type and clipmust be provided).

F10 – Removablecore spring terry clip.

0 – Mill extrudedaluminium.

2 – Silver (RAL9006)polyester powder coat.

3 – White (RAL9010)20% polyester powdercoat.

4 – Black (RAL9005)polyester powder coat.

5 – Brushed(Linished) naturalaluminium facesurfaces, 32 mm frameonly.

6 – Special polyesterpowder coat finish.(Please state separatelythe RAL colourreference and finishtype required).

Important Note: If the overall size is critical then it must be clearly stated on the order. All orders must be addressed to Swegon Air Management Limited.

Single Deflection Grilles25W, 25C SDH single deflection grille with a one set of horizontal blades.

25W, 25C SDV single deflection grille with a one set of vertical blades.

Double Deflection Grilles25W, 25C DDH double deflection grille with one set of front horizontal and one set of rear vertical blades.

25W, 25C DDV double deflection grille with one set of front vertical and one set of rear horizontal blades.

Egg Crate Grille25W, 25C, 44W ECG egg crate grille with a fixed core.

25W, 25C, 23W ECG-RC egg crate grille with a removable core.

Perforated Grille25W, 25C, 44W, 23W PG perforated grille with a fixed core.

45° Fixed Blade25W, 25C, 44W FBG45 45° fixed blade grille with a 1 way core. (State separately if 2 way core required).

Non Vision Grille25W, 25C NVG non-vision grille.

25W, 25C NVG-MF non-vision grille with a standard matching flange.25W, 25C NVG-DF non-vision grille with a deep matching flange.

Bar Grilles20W, 20C, 25W, 25C, 32W, 44W NB0 narrow blade bar grille having 0° deflection, 3.5mm blade on 12.5mm pitch.

20W, 20C, 25W, 25C, 32W, 44W NB15 narrow blade bar grille having 15° deflection, 3.5mm blade on 12.5mm pitch.

20W, 20C, 25W, 25C, 32W, 44W NB30 narrow blade bar grille having 30° deflection, 3.5mm blade on 12.5mm pitch.

20W, 20C, 25W, 25C, 32W, 44W GN0 narrow blade bar grille having 0° deflection, 3.5mm blade on 19mm pitch.



20W, 20C, 25W, 25C, 32W, 44W WB0 wide blade bar grille having 0° deflection, 6.5mm blade on 14mm pitch.

20W, 20C, 25W, 25C, 32W, 44W WB15 wide blade bar grille having 15° deflection, 6.5mm blade on 14mm pitch.20W, 20C, 25W, 25C, 32W, 44W WB30 wide blade bar grille having 30° deflection, 6.5mm blade on 14mm pitch.

20W, 20C, 25W, 25C, 32W, 44W GW0 wide blade bar grille having 0° deflection, 6.5mm blade on 19mm pitch.

20W, 20C, 25W, 25C, 32W, 44W GW15 wide blade bar grille having 15° deflection, 6.5mm blade on 19mm pitch.

Fixed and Removable Core - Bar Grilles Only.To denote a Fixed Core bar grille FC must be added to the Model type (e.g. NB0FC) alternatively to denote a removable core bargrille RC must be added to the Model type (e.g. NB0RC).

actionair | air diffusion | airfiltrera | airolution | naco

Stourbridge Rd, Bridgnorth,WV15 5BB, Shropshire, UK

The statements made in this brochure or by ourrepresentatives in consequence of any enquiries arising out of this document are given for information purposesonly. They are not intended to have any legal effect andthe company is not to be regarded as bound thereby.The company will only accept obligations which are expressly negotiated for and agreed and incorporated into a written agreement made with its customers.

Due to a policy of continuous product development thespecification and details contained herein are subject toalteration without prior notice.

Tel: +44 (0)1746 761921Email: [email protected]: air-diffusion.co.uk

LNNN00398 (1.0)

Documents

Wall and Ceiling Grilles - Swegon