Ceiling diffusers

36
Technical Catalogue Ceiling Diffusers

description

 

Transcript of Ceiling diffusers

Page 1: Ceiling diffusers

Technical Catalogue

Ceiling Diffusers

Page 2: Ceiling diffusers
Page 3: Ceiling diffusers

Ceiling Diffusers are suitable for modular ceiling systems, heating, ventilating and cooling applications. Ceiling diffusers are efficient in handling high air volumes at a relatively low noise levels to offer an even disbursement of air. Multi-core diffusers are constructed from extruded Aluminium profiles/sheets. Available in a wide range of sizes in square and rectangular shapes a wide variety of air flow patterns can be achived to suit individual user`s needs.

Ceiling Diffusers

Ref: GD1000CD

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EXCELAIR Air Outlets | Technical Catalogue

Diffusers are used in all HVAC systems as an integral part of room air distribution sub – systems.

High level of comfort in indoor air flow and higher performance level can be achieved.

dna noitubirtsid ria neve gnirusne noitcurtsnoc ydruts dna ecnaraeppa larutcetihcra sti rof nwonk si resuffid gnilieCflow equalization.

Enhances mixing of the room air with the primary air and discharge neatly executed.

Appropriate where low velocity air movement is indispensable.

Ceiling diffusers are efficient in handling high air volumes at a comparatively low noise levels to offer even disburse-ment of air.

Ceiling diffusers are intended to discharge the best possible directional performance. All our products are exceedingly versatile in design. Adjustable pattern models are available for pattern control from vertical projection to horizontal air circulation, adaptable for both variable air volume and constant air volume systems. Available in a wide range of sizes in both square and rectangular shapes.

Frames/Blades

Finish

Installation

Shape

Extruded aluminium alloy profile

Electrostatic polyester powder coated system/RAL code

Ceiling or duct mounting

Square and Rectangular

Ceiling Diffusers | Introduction

1

IntroductionCeiling Diffusers

Page 6: Ceiling diffusers

Assembling FeaturesCeiling Diffusers

Ceiling diffusers shaped in both square and rectangle, have a strong profile construction with extruded, streamlined, aluminum alloy to withstand corrosion.

The blades are wing-shaped which ensures optimam air flow turbulence,thereby securing lower noise level.

Each diffuser, has a detachable snap-in middle core on its face, enabling easy installation. This also facilitates damper adjustments and maintenance. The core can be replaced without alterating the external frame.

Blades fixed in ascending dimension from the inner core forms a division and fixed to the external frame by dual loaded steel springs with four pins, results in centrally aligned core.

For preferred directional airflow, a choice of multi models in one way, two ways, three ways and four way diffusers avialable.

Customer’s requirements in various neck sizes ranging from 150 x 150mm to 600 x 600 mm can be provided. Also avilable with GI “neck adapters” according to the request.

One, two, three and four way patterns depends on the configuration of the room to be conditioned, number of diffuser installed in that room, type, and the location of lighting fixtures or other ornamental patterns mounted on the same ceiling.

Inner core enables to select various air supply patterns either for use in a corridor like areas or for a larger area where even air disbursement on all four sides need to be achieved.

97mm

Listed Size

Listed Size + 89mm

Listed Size + 140mm

30mm 60mm

30O

97mm

Listed Size

Listed Size + 89mm

Listed Size + 140mm

30mm 60mm

30O

OBD

Listed Size - 6mm

Without Damper With Damper

Listed Size - 6mm

Ceiling Diffusers | Assembling Features

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EXCELAIR Air Outlets | Technical Catalogue

Dimensional Details

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Ceiling Diffusers | Available Flow Patterns

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Rectangular Ceiling Diffusers [RCD]

1 Way-DischargeHorizontal Blades

2 Way-DischargeHorizontal Blades

2 Way-Discharge Corner Blades

3 Way-Discharge

1 Way-DischargeVertical Blades

2 Way-Discharge Vertical Blades

2 Way-DischargeCorner Blades

4 Way-Discharge

Square Ceiling Diffusers [SCD]

1 Way-Dischargeege1 Way-Discharg 2 Way-DischargeOpposite Bladeses

eesgeesOpposite BladeOOpposite BladeO

2 OOpposite Blade

Way-DischargOpposite Blade

3 Way-Dischargee33 Way Dischargeee33 Way Dischargrg33 WWay Discharrg33 WWay-Dischar 4 Way-Discharge4 Way-Dischargege4 WWay Discharg

2 Way-DischargeCorner BladesCorner BladesCCorner Blades

eeCCorner Bladeses

ees

eggCCorner BladeCCorner BladeC

2 2Corner BladeWay-DischarWa Dischar

EXCELAIR Air Outlets | Technical Catalogue

sers [Rus

1

seeeererss [[[R

1

[R

WW

RCDRCD

W

RC

Way-DischargeWayWayWay

CDCDDD

Way

DDD]D]

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ggyyyy eargearhayy2 WWWayy-Disch2 Way-Discharge2 Way Discharge

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1 Way-Discharge

Available Flow PatternsCeiling Diffusers

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Ceiling Diffusers | Performance Data

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EXCELAIR Air Outlets | Technical Catalogue

One Way Air Flow Pattern:

Size

(mm)

Area Factor(Ak)

Neck Area(Sq. ft.)

Neck Velocity (fpm) 200 250 300 350 400 500 600 700 800 900

Velocity Pressure (In.w.g) .003 .004 .006 .008 .010 .016 .023 .031 .040 .051

Total Pressure (In.w.g) .015 .024 .034 .046 .060 .094 .136 .184 .240 .305

150 x 150Ak = .085

0.250

CFM THROW (ft.) NC (dB)

507-10

20

638-12

20

7510-15

20

8812-17

20

10014-19

20

12517-21

20

15019-23

23

17520-24

27

20022-26

31

22523-27

35

225 X 225Ak = .177

0.562

CFM THROW (ft.) NC (dB)

1109-13

20

14011-16

20

17014-18

20

19516-19

20

22517-21

20

28019-23

21

33521-25

27

39522-27

31

45024-29

35

50526-30

39

300 X 300Ak = .306

1.000

CFM THROW (ft.) NC (dB)

20011-16

20

25014-18

20

30016-19

20

35017-21

20

4001-22

20

50020-25

23

60022-27

30

70024-29

34

80026-31

38

90027-33

42

375 X 375Ak = .472

1.56

CFM THROW (ft.) NC (dB)

31013-17

20

39015-19

20

47017-20

20

54518-22

20

62519-23

21

78022-26

26

94024-28

32

109025-30

36

125027-32

40

140529-34

44

450 X 450Ak = .674

2.25

CFM THROW (ft.) NC (dB)

45014-18

20

56016-19

20

67517-21

20

78519-23

21

90020-24

23

112523-27

28

135025-30

34

157527-32

38

180029-34

42

202530-36

45

525 X 525Ak = .914

3.06

CFM THROW (ft.) NC (dB)

61015-18

20

76517-20

20

92018-22

20

107020-24

22

122521-25

23

153024-28

30

183526-31

36

214028-33

40

245030-35

44

275532-37

49

600 X 600Ak = 1.22

4.00

CFM THROW (ft.) NC (dB)

80015-19

20

100017-21

20

120019-23

20

140020-25

23

160022-26

24

200024-29

31

240027-32

37

280029-34

41

320031-37

45

360033-39

50

(Inches)

6 x 6

9 x 9

12 x 12

15 x 15

18 x 18

21 x 21

24 x 24

Two Way Air Flow Pattern:

Size

(mm)

AreaFactor(Ak)

Neck Velocity (fpm) 200 250 300 350 400 500 600 700 800 900

Velocity Pressure (In.w.g) .003 .004 .006 .008 .010 .016 .023 .031 .040 .051

Total Pressure (In.w.g) .014 .022 .032 .043 .057 .088 .128 .174 .226 .286

150 x 150Ak = .085

0.250

CFM THROW (ft.) NC (dB)

505-8

20

636-920

758-11

20

889-13

20

10010-14

20

12512-17

20

15015-21

23

17518-23

27

20020-25

31

22522-27

35

225 X 225Ak = .177

0.562

CFM THROW (ft.) NC

1107-10

20

1408-12

20

17010-15

20

19512-16

20

22514-19

20

28017-22

21

33520-24

27

39521-26

31

45023-27

35

50524-29

39

300 X 300Ak = .306

1.000

CFM THROW NC (dB)

2009-12

20

25011-15

20

30013-18

20

35015-20

20

40017-21

20

50020-24

23

60022-26

30

70023-28

34

80025-30

38

90026-32

42

375 X 375Ak = .472

1.56

CFM THROW (ft.) NC (dB)

31010-14

20

39012-18

20

47015-20

20

54517-21

20

62519-22

21

78021-25

26

94023-27

32

109025-29

36

125026-31

40

140528-33

44

450 X 450Ak = .674

2.25

CFM THROW (ft.) NC (dB)

45012-16

20

56014-19

20

67517-21

20

78518-22

21

90020-24

23

112522-26

28

135024-29

34

157526-31

38

180028-33

42

202529-35

45

525 X 525Ak = .914

3.06

CFM THROW (ft) NC (dB)

61013-18

20

76516-20

20

92018-21

20

107019-23

22

122520-25

23

153023-27

30

183525-30

36

214027-32

40

245029-34

44

275531-36

49

600 X 600Ak = 1.22

4.00

CFM THROW (dB) NC (dB)

80014-18

20

100017-20

20

120018-22

20

140020-24

23

160021-25

24

200024-28

31

240026-31

37

280028-33

41

320030-36

45

360032-38

50

Neck Area(Sq. ft.)(Inches)

6 x 6

9 x 9

12 x 12

15 x 15

18 x 18

21 x 21

24 x 24

Throw data in feet, based on isothermal air at 100 and 50 FPM terminal velocity

6000 7 09009700 800

050

009060

37

00

7 41 45

700 800

Square Ceiling Diffusers-Supply[SCD-S]

Performance DataCeiling Diffusers

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Ceiling Diffusers | Performance Data

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EXCELAIR Air Outlets | Technical Catalogue

Three Way Air Flow Pattern:

Size

(mm)

Neck Velocity (fpm) 200 250 300 350 400 500 600 700 800 900

Velocity Pressure (In. w.g) .003 .004 .006 .008 .010 .016 .023 .031 .040 .051

Total Pressure (In. w.g) .012 .019 .027 .036 .048 .074 .107 .146 .190 .240

150 x 150Ak = .085

0.250

CFM THROW (ft.) NC (dB)

503-520

634-620

754-720

885-8

20

1006-920

1258-11

20

1509-13

23

17510-15

27

20012-17

31

22514-19

35

225 X 225Ak = .177

0.562

CFM THROW (ft.) NC (dB)

1104-720

1405-8

20

1706-920

1957-11

20

2258-12

20

28010-15

21

33513-18

27

39515-21

31

45017-22

35

50519-23

39

300 X 300Ak = .306

1.000

CFM THROW (ft.) NC (dB)

2005-8

20

2506-10

20

3008-11

20

3509-13

20

40010-15

20

50013-19

23

60016-21

30

70018-22

34

80020-24

38

90021-25

42

375 X 375Ak = .472

1.56

CFM THROW (ft.) NC (dB)

3106-920

3908-11

20

4709-13

20

54511-15

20

62512-17

21

78016-20

26

94018-22

32

109020-24

36

125021-26

40

140522-27

44

450 X 450Ak = .674

2.25

CFM THROW (dB) NC (dB)

4507-11

20

5609-13

20

67511-15

20

78513-18

21

90014-19

23

112518-22

28

135020-24

34

157521-25

38

180023-27

42

202524-29

45

525 X 525Ak = .914

3.06

CFM THROW (ft.) NC (dB)

6108-12

20

76510-14

20

92012-17

20

107014-19

22

122516-20

23

153019-23

30

183521-25

36

214022-27

40

245024-28

44

275525-30

49

600 X 600Ak = 1.22

4.00

CFM THROW (ft.) NC (dB)

8009-13

20

100011-16

20

120013-18

20

140015-20

23

160017-21

24

200019-23

31

240021-25

37

280023-27

41

320025-29

45

360026-31

50

Area Factor(Ak)Neck Area

(Sq. ft.)(Inches)

9 x 9

12 x 12

15 x 15

18 x 18

21 x 21

24 x 24

6 x 6

Four Way Air Flow Pattern:

Size

(mm)

Neck Velocity (fpm) 200 250 300 350 400 500 600 700 800 900

Velocity Pressure (In. w.g) .003 .004 .006 .008 .010 .016 .023 .031 .040 .051

Total Pressure (In. w.g) .011 .017 .024 .032 .042 .066 .096 .130 .170 .215

150 x 150Ak = .085

0.250

CFM THROW (ft.) NC (dB)

502-420

633-620

754-720

885-8

20

1006-920

1257-11

20

1508-12

23

17510-14

27

20011-16

31

22513-18

35

225 X 225Ak = .177

0.562

CFM THROW (ft.) NC (dB)

1104-620

1405-720

1706-920

1957-10

20

2258-11

20

28010-13

21

33511-16

27

39513-19

31

45015-20

35

50517-21

39

300 X 300Ak = .306

1.000

CFM THROW (ft.) NC (dB)

2005-720

2506-920

3007-11

20

3508-12

20

40010-14

20

50012-17

23

60014-20

30

70017-21

34

80018-23

38

90020-24

42

375 X 375Ak = .472

1.56

CFM THROW (ft.) NC (dB)

3106-920

3907-11

20

4709-13

20

54510-15

20

62512-17

21

78014-19

26

94017-21

32

109018-22

36

125020-24

40

140521-25

44

450 X 450Ak = .674

2.25

CFM THROW (ft.) NC (dB)

4507-10

20

5608-12

20

67510-14

20

78512-16

21

90013-18

23

112516-20

28

135018-22

34

157520-24

38

180021-26

42

202522-27

45

525 X 525Ak = .914

3.06

CFM THROW (ft.) NC (dB)

6107-11

20

7659-13

20

92011-16

20

107013-18

22

122515-19

23

153018-22

30

183520-24

36

214021-25

40

245023-27

44

275524-29

49

600 X 600Ak = 1.22

4.00

CFM THROW (ft.) NC (dB)

8008-12

20

100010-15

20

120012-18

20

140014-19

23

160016-20

24

200019-23

31

240020-25

37

280022-26

41

320023-28

45

360025-30

50

Area Factor(Ak)Neck Area

(Sq. ft.)

9 x 9

12 x 12

15 x 15

18 x 18

21 x 21

24 x 24

6 x 6

(Inches)

Throw data in feet, based on isothermal air at 100 and 50 FPM terminal velocity

0 09077000 9800

7 41 45 50

Performance DataCeiling Diffusers

Square Ceiling Diffusers-Supply[SCD-S]

Page 10: Ceiling diffusers

Ceiling Diffusers | Performance Data

6

EXCELAIR Air Outlets | Technical Catalogue

Performance DataCeiling Diffusers

Two Way Air Flow Pattern:

Size

(mm)

Neck Velocity (fpm) 200 250 300 350 400 500 600 700 800 900

Velocity Pressure (In. w.g) .003 .004 .006 .008 .010 .016 .023 .031 .040 .051

Total Pressure (In. w.g) .042 .066 .096 .130 .170 .265 .381 .518 .680 .852

150 x 150 CFM NC (dB)

5020

6320

7520

8820

10020

12520

15023

17527

20031

22535

225 X 225 CFM NC (dB)

11020

14020

17020

19520

22520

28021

33527

39531

45035

50539

300 X 300 CFM NC (dB)

20020

25020

30020

35020

40020

50023

60030

70034

80038

90042

375 X 375 CFM NC (dB)

31020

39020

47020

54520

62521

78026

94032

109036

125040

140544

450 X 450 CFM NC (dB)

45020

56020

67520

78521

90023

112528

135034

157538

180042

202545

525 X 525 CFM NC (dB)

61020

76520

92020

107022

122523

153030

183536

214040

245044

275549

600 X 600

0.250

0.562

1.000

1.56

2.25

3.06

4.00 CFM NC (dB)

80020

100020

120020

140023

160024

200031

240037

280041

320045

360050

(Sq. ft.)(Inches)

6 x 6

9 x 9

12 x 12

15 x 15

18 x 18

21 x 21

24 x 24

Size

(mm)

NeckArea

(Sq. ft.)

Neck Velocity (fpm) 200 250 300 350 400 500 600 700 800 900

Velocity Pressure (In. w.g) .003 .004 .006 .008 .010 .016 .023 .031 .040 .051

Total Pressure (In. w.g) .037 .058 .083 .112 .148 .230 .332 .450 .590 .752

150 x 150 0.250 CFM NC (dB)

5020

6320

7520

8820

10020

12520

15023

17527

20031

22535

225 X 225 0.562 CFM NC (dB)

11020

14020

17020

19520

22520

28021

33527

39531

45035

50539

300 X 300 1.000 CFM NC (dB)

20020

25020

30020

35020

40020

50023

60030

70034

80038

90042

375 X 375 1.56 CFM NC (dB)

31020

39020

47020

54520

62521

78026

94032

109036

125040

140544

450 X 450 2.25 CFM NC (dB)

45020

56020

67520

78521

90023

112528

135034

157538

180042

202545

525 X 525 3.06 CFM NC (dB)

61020

76520

92020

107022

122523

153030

183536

214040

245044

275549

600 X 600 4.00 CFM NC (dB)

80020

100020

120020

140023

160024

200031

240037

280041

320045

360050

(Inches)

6 x 6

9 x 9

12 x 12

15 x 15

18 x 18

21 x 21

24 x 24

One Way Air Flow Pattern:

Square Ceiling Diffusers-Return[SCD-R]

Page 11: Ceiling diffusers

EXCELAIR Air Outlets | Technical Catalogue Ceiling Diffusers | Performance Data

7

Three Way Air Flow Pattern:

Size

(mm)

Neck Velocity (fpm) 200 250 300 350 400 500 600 700 800 900

Velocity Pressure (w.g) .003 .004 .006 .008 .010 .016 .023 .031 .040 .051

Total Pressure (w.g) 0.38 .059 .085 .107 .154 .235 .336 .460 .600 .757

150 x 150 0.2505020

6320

7520

8820

10020

12520

15022

17526

20030

22534

225 X 225 0.56211020

14020

17020

19520

22520

28020

33526

39530

45034

50538

300 X 300 1.00020020

25020

30020

35020

40020

50022

60029

70033

80037

90041

375 X 375 1.5631020

39020

47020

54520

62520

78025

94031

109035

125039

140543

450 X 450 2.2545020

56020

67520

78520

90022

112527

135033

157537

180041

202544

525 X 525 3.0661020

76520

92020

107021

122522

153029

183535

214039

245043

275548

600 X 600 4.00

CFM NC

CFM NC

CFM NC

CFM NC

CFM NC

CFM NC

CFM NC

80020

100020

120020

140022

160023

200030

240036

280040

320044

360049

NeckArea

(Sq. ft.)(Inches)

6 x 6

9 x 9

12 x 12

15 x 15

18 x 18

21 x 21

24 x 24

Four Way Air Flow Pattern:

Size

(mm)

Neck Velocity (fpm) 200 250 300 350 400 500 600 700 800 900

Velocity Pressure (w.g) .003 .004 .006 .008 .010 .016 .023 .031 .040 .051

Total Pressure (w.g) 0.43 .067 .097 .132 .172 .269 .388 .525 .690 .864

150 x 150 0.250 CFM NC

5020

6320

7520

8820

10020

12520

15022

17526

20030

22534

225 X 225 0.562 CFM NC

11020

14020

17020

19520

22520

28020

33526

39530

45034

50538

300 X 300 1.000 CFM NC

20020

25020

30020

35020

40020

50022

60029

70033

80037

90041

375 X 375 1.56 CFM NC

31020

39020

47020

54520

62520

78025

94031

109035

125039

140543

450 X 450 2.25 CFM NC

45020

56020

67520

78520

90022

112527

135033

157537

180041

202544

525 X 525 3.06 CFM NC

61020

76520

92020

107021

122522

153029

183535

214039

245043

275548

600 X 600 4.00 CFM NC

80020

100020

120020

140022

160023

200030

240036

280040

320044

360049

6 x 6

9 x 9

12 x 12

15 x 15

18 x 18

21 x 21

24 x 24

NeckArea

(Sq. ft.)(Inches)

000 000907000 800 9

Performance DataCeiling Diffusers

Square Ceiling Diffusers-Return[SCD-R]

Page 12: Ceiling diffusers

EXCELAIR Air Outlets | Technical Catalogue 2011 Ceiling Diffusers | Performance Data

8

Performance DataCeiling Diffusers

Size(mm)

&(Inches)

Area Factor(AK)

Neck Area(Sq. ft.)

Neck Velocity (fpm)

Velocity Pressure in W.G.

Total Pressure in W.G.

Side

CFM Total

CFM/Side

Throw/Side

NC (dB)

CFM Total

CFM/Side

Throw/Side

NC (dB)

CFM Total

CFM/Side

Throw/Side

NC (dB)

CFM Total

CFM/Side

Throw/Side

NC (dB)

CFM Total

CFM/Side

Throw/Side

NC (dB)

CFM Total

CFM/Side

Throw/Side

NC (dB)

CFM Total

CFM/Side

Throw/Side

NC (dB)

CFM Total

CFM/Side

Throw/Side

NC (dB)

CFM Total

CFM/Side

Throw/Side

NC (dB)

CFM Total

CFM/Side

Throw/Side

NC (dB)

CFM Total

CFM/Side

Throw/Side

NC (dB)

CFM Total

CFM/Side

Throw/Side

NC (dB)

CFM Total

CFM/Side

Throw/Side

NC (dB)

CFM Total

CFM/Side

Throw/Side

NC (dB)

CFM Total

CFM/Side

Throw/Side

NC (dB)

225 x 150

9 x 6

300 x 150

12 x 6

300 x 225

12 x 9

375 x 150

15 x 6

375 x 225

15 x 9

375 x 300

15 x 12

450 x 150

18 x 6

450 x 225

18 x 9

450 x 300

18 x 12

525 x 150

21 x 6

525 x 225

21 x 9

525 x 300

21 x 12

600 x 150

24 x 6

600 x 225

24 x 9

600 x 300

24 x 12

Ak = .122

0.375

Ak = .158

0.500

Ak = .232

0.750

Ak = .195

0.625

Ak = .287

0.938

Ak = .380

1.25

Ak = .232

0.750

Ak = .343

1.125

Ak = .453

1.50

Ak = .269

0.875

Ak = .398

1.31

Ak = .523

1.75

Ak = .306

1.00

Ak = .453

1.50

Ak = .601

2.00

200

.003

.021

300

.006

.046

400

.010

.081

500

.016

.130

600

.023

.180

700

.031

.250

800

.040

.320

900

.051

.390

A B A B A B A B A B A B A B A B

75 110 150 190 225 265 300 337

75 -

-

110 - 150 - 190 - 225 - 265 - 300 - 337 -

20 20 20 20 25 29 33 37

10 - 14 -12 - 17 -14 - 20 -16 - 23 -17 - 25 -18 - 26 -20 - 28 -21 - 30

100 150 200 250 300 350 400 450

100 -

-

150 - 200 - 250 - 300 - 350 - 400 - 450 -

20 20 20 20 27 30 34 38

10 - 15 -12 - 17 -14 - 20 -16 - 23 -17 - 25 -18 - 26 -20 - 28 -21 - 30

150 225 300 375 450 525 600 675

150 -

-

225 - 300 - 375 - 450 - 525 - 600 - 675 -

20 20 20 22 28 32 36 40

13 - 19 -15 - 21 -17 - 24 -19 - 27 -21 - 30 -22 - 32 -24 - 34 -26 - 36

125 188 250 313 375 438 500 565

125 -

-

188 - 250 - 313 - 375 - 438 - 500 - 565 -

20 20 20 21 27 31 35 39

12 - 17 -14 - 19 -16 - 23 -18 - 25 -20 - 27 -21 - 29 -23 - 31 -24 - 33

188 281 375 469 563 656 750 845

188 -

-

281 - 375 - 469 - 563 - 656 - 750 - 845 -

20 20 20 23 29 33 37 41

14 - 19 -16 - 23 -18 - 26 -21 - 30 -22 - 32 -24 - 34 -25 - 37 -27 - 39

250 375 500 625 750 875 1000 1125

250 -

-

375 - 500 - 625 - 750 - 875 - 1000 - 1125 -

20 20 20 25 31 35 39 43

15 - 21 -17 - 24 -20 - 28 -23 - 32 -25 - 34 -26 - 37 -28 - 40 -30 - 42

150 225 300 375 450 525 600 675

150 -

-

225 - 300 - 375 - 450 - 525 - 600 - 675 -

20 20 20 22 28 32 36 40

13 - 19 -15 - 21 -17 - 24 -19 - 27 -21 - 30 -22 - 32 -24 - 34 -26 - 36

225 338 450 563 675 788 900 1012

225 -

-

338 - 450 - 563 - 675 - 788 - 900 - 1012 -

20 20 20 24 30 34 38 42

14 - 19 -16 - 23 -18 - 26 -21 - 30 -22 - 32 -24 - 34 -25 - 37 -27 - 39

300 450 600 750 900 1050 1200 1350

300 -

-

450 - 600 - 750 - 900 - 1050 - 1200 - 1350 -

20 20 20 26 32 36 40 44

14 - 20 -17 - 24 -20 - 28 -23 - 32 -25 - 34 -26 - 37 -28 - 40 -30 - 42

175 263 350 438 525 613 700 787

175 -

-

263 - 350 - 438 - 525 - 613 - 700 - 787 -

20 20 20 22 28 32 36 40

13 - 19 -15 - 21 -17 - 24 -19 - 27 -21 - 30 -22 - 32 -24 - 34 -26 - 36

263 394 525 656 788 919 1050 1181

263 -

-

394 - 525 - 656 - 788 - 919 - 1050 - 1181 -

20 20 20 24 30 34 38 42

15 - 21 -17 - 24 -20 - 28 -23 - 32 -25 - 34 -26 - 37 -28 - 40 -30 - 42

350 525 700 875 1050 1225 1400 1575

350 -

-

525 - 700 - 875 - 1050 - 1225 - 1400 - 1575 -

20 20 20 26 32 36 40 44

15 - 22 -18 - 26 -21 - 30 -24 - 34 -26 - 37 -28 - 40 -30 - 42 -32 - 45

200 300 400 500 600 700 800 900

200 -

-

300 - 400 - 500 - 600 - 700 - 800 - 900 -

20 20 20 23 29 33 37 41

14 - 20 -16 - 23 -18 - 26 -21 - 30 -22 - 32 -24 - 34 -25 - 37 -27 - 39

300 450 600 750 900 1050 1200 1350

300 -

-

450 - 600 - 750 - 900 - 1050 - 1200 - 1350 -

20 20 20 25 31 35 39 43

14 - 20 -17 - 24 -20 - 28 -23 - 32 -25 - 37 -26 - 37 -28 - 40 -30 - 42

400 600 800 1000 1200 1400 1600 1800

400 - 600 - 800 - 1000 - 1200 - 1400 - 1600 - 1800 -

-

20 20 20 27 33 37 41 45

17 - 24 -20 - 28 -23 - 32 -26 - 37 -28 - 39 -30 - 42 -33 - 45 -35 - 48

One Way Airflow Pattern

Throw data in feet, based on isothermal air at 100 and 50 FPM terminal velocity

AAA

Rectangular Ceiling Diffusers-Supply[RCD-S]

Page 13: Ceiling diffusers

Ceiling Diffusers | Performance Data

9

EXCELAIR Air Outlets | Technical Catalogue

Performance DataCeiling Diffusers

700

.031

.200

800

.040

.260

900

.051

.319

A B A B A B

263 300 337

175 88 200 100 225 112

29 33 37

12 - 1615 - 21 13 - 1716 - 23 14 - 1817 - 24

350 400 450

266 87 300 100 338 112

30 34 38

12 - 1618 - 26 13 - 1720 - 28 14 - 1821 - 30

525 600 675

329 196 375 225 423 252

32 36 40

15 - 2018 - 26 16 - 2120 - 28 17 - 2321 - 30

438 500 563

350 87 400 100 450 112

31 35 39

12 - 1618 - 26 23 - 1720 - 28 14 - 1821 - 30

656 750 845

459 197 525 225 592 253

33 37 41

15 - 2021 - 28 16 - 2123 - 31 17 - 2324 - 33

875 1000 1125

525 350 600 400 675 450

35 39 43

17 - 3422 - 32 18 - 2524 - 34 20 - 2726 - 36

525 600 675

434 91 496 104 558 117

32 36 40

12 - 1621 - 29 13 - 1723 - 31 14 - 1824 - 33

788 900 1012

591 197 565 225 759 253

34 38 42

15 - 2022 - 32 16 - 2124 - 34 17 - 2326 - 36

1050 1200 1350

700 350 800 400 900 450

36 40 44

17 - 2424 - 34 18 - 2525 - 37 20 - 2727 - 39

613 700 787

525 87 600 100 675 112

32 36 40

12 - 1622 - 32 13 - 1724 - 34 14 - 1826 - 36

919 1050 1181

720 199 825 225 927 253

34 38 42

15 - 2024 - 34 16 - 2125 - 37 17 - 2327 - 39

1225 1400 1575

875 350 1000 400 1125 450

36 40 44

17 - 2426 - 37 18 - 2528 - 40 20 - 2730 - 42

700 800 900

613 87 700 100 788 112

33 37 41

12 - 1622 - 32 13 - 1724 - 34 14 - 1826 - 36

1050 1200 1350

855 197 975 225 1097 253

35 39 43

15 - 2026 - 37 16 - 2128 - 40 17 - 2330 - 42

1400 1600 1800

1050 350 1200 400 1350 450

37 41 45

17 - 2426 - 37 18 - 2528 - 40 20 - 2730 - 42

Size(mm)

&(Inches)

Area Factor(AK)

Neck Area(Sq. ft.)

Neck Velocity (fpm)

Velocity Pressure in W.G.

Total Pressure in W.G.

Side

CFM Total

CFM/Side

Throw/Side

NC (dB)

CFM Total

CFM/Side

Throw/Side

NC (dB)

CFM Total

CFM/Side

Throw/Side

NC (dB)

CFM Total

CFM/Side

Throw/Side

NC (dB)

CFM Total

CFM/Side

Throw/Side

NC (dB)

CFM Total

CFM/Side

Throw/Side

NC (dB)

CFM Total

CFM/Side

Throw/Side

NC (dB)

CFM Total

CFM/Side

Throw/Side

NC (dB)

CFM Total

CFM/Side

Throw/Side

NC (dB)

CFM Total

CFM/Side

Throw/Side

NC (dB)

CFM Total

CFM/Side

Throw/Side

NC (dB)

CFM Total

CFM/Side

Throw/Side

NC (dB)

CFM Total

CFM/Side

Throw/Side

NC (dB)

CFM Total

CFM/Side

Throw/Side

NC (dB)

CFM Total

CFM/Side

Throw/Side

NC (dB)

225 x 150

9 x 6

300 x 150

12 x 6

300 x 225

12 x 9

375 x 150

15 x 6

375 x 225

15 x 9

375 x 300

15 x 12

450 x 150

18 x 6

450 x 225

18 x 9

450 x 300

18 x 12

525 x 150

21 x 6

525 x 225

21 x 9

525 x 300

21 x 12

600 x 150

24 x 6

600 x 225

24 x 9

600 x 300

24 x 12

Ak = .122

0.375

Ak = .158

0.500

Ak = .232

0.750

Ak = .195

0.625

Ak = .287

0.938

Ak = .380

1.25

Ak = .232

0.750

Ak = .343

1.125

Ak = .453

1.50

Ak = .269

0.875

Ak = .398

1.31

Ak = .523

1.75

Ak = .306

1.00

Ak = .453

1.50

Ak = .601

2.00

200

.003

.016

300

.006

.036

400

.010

.064

500

.016

.100

600

.023

.140

A B A B A B A B A B

75 113 150 188 225

50 25

7 - 9

75 38 100 50 125 63 150 75

20 20 20 20 25

8 - 12 8 - 1010 - 14 9 - 1211 - 16 10 - 1413 - 18 11 - 1514 - 20

100 150 200 250 300

75 25

7 - 9

112 38 150 50 188 62 225 75

20 20 20 20 27

10 - 14 8 - 1012 - 17 9 - 1214 - 20 10 - 1416 - 23 11 - 1517 - 25

150 225 300 375 450

94 56

8 - 11

141 84 188 112 235 140 282 168

20 20 20 22 28

10 - 14 10 - 1312 - 17 11 - 1514 - 20 13 - 1716 - 23 14 - 1817 - 25

125 188 250 313 375

100 25

7 - 9

150 37 200 50 250 62 300 75

20 20 20 21 27

10 - 14 8 - 1012 - 17 9 - 1214 - 20 10 - 1416 - 23 11 - 1517 - 25

188 281 375 469 563

131 56

8 - 11

197 84 263 212 329 141 394 169

20 20 20 23 29

12 - 16 10 - 1314 - 19 11 - 1516 - 22 13 - 1718 - 25 14 - 1820 - 27

250 375 500 625 750

150 100

9 - 14

225 150 300 200 375 250 450 300

20 20 20 25 31

13 - 18 11 - 1615 - 21 13 - 1817 - 24 15 - 2119 - 27 16 - 2221 - 30

150 225 300 375 450

124 26

7 - 9

186 39 248 52 310 65 372 78

20 20 20 22 28

12 - 16 8 - 1014 - 19 9 - 1216 - 22 10 - 1418 - 25 11 - 1520 - 27

225 338 450 563 675

169 56

9 - 11

254 84 338 112 422 141 506 169

20 20 20 24 30

13 - 18 10 - 1315 - 21 11 - 1517 - 24 13 - 1719 - 27 14 - 1821 - 30

300 450 600 750 900

200 100

9 - 14

300 150 400 200 500 250 600 300

20 20 20 26 32

14 - 20 11 - 1616 - 23 13 - 1818 - 26 15 - 2121 - 30 16 - 2222 - 32

175 263 350 438 525

150 25

7 - 9

225 38 300 50 375 63 450 75

20 20 20 22 28

14 - 18 8 - 1015 - 21 9 - 1217 - 24 10 - 1419 - 27 11 - 1521 - 30

263 394 525 656 788

206 57

9 - 11

308 85 412 113 514 142 618 170

20 20 20 24 30

14 - 20 10 - 1316 - 23 11 - 1518 - 26 13 - 1721 - 30 14 - 1822 - 32

350 525 700 875 1050

250 100

9 - 14

375 150 500 200 625 250 750 300

20 20 20 26 32

14 - 20 11 - 1617 - 24 13 - 1820 - 28 15 - 2123 - 32 16 - 2225 - 34

200 300 400 500 600

175 25

7 - 9

263 37 350 50 438 62 525 75

20 20 20 23 29

13 - 18 8 - 1015 - 21 9 - 1217 - 24 10 - 1419 - 27 11 - 1521 - 30

300 450 600 750 900

244 56

9 - 11

366 84 488 112 609 141 731 169

20 20 20 25 31

14 - 20 10 - 1317 - 24 11 - 1520 - 28 13 - 1723 - 32 14 - 1825 - 34

400 600 800 1000 1200

300 100 450 150 600 200 750 250 900 300

9 - 14

20 20 20 27 33

14 - 20 11 - 1417 - 20 13 - 1820 - 28 15 - 2123 - 32 16 - 2225 - 34

Throw data in feet, based on isothermal air at 100 and 50 FPM terminal velocity

Two Way Air Flow Pattern:

B

ARectangular Ceiling Diffusers-Supply[RCD-S]

B

A

B

A

Page 14: Ceiling diffusers

Ceiling Diffusers | Performance Data

10Throw data in feet, based on isothermal air at 100 and 50 FPM terminal velocity

Size(mm)

&(Inches)

Area Factor(AK)

Neck Area(Sq. ft.)

Neck Velocity (fpm)

Velocity Pressure in W.G.

Total Pressure in W.G.

Side

CFM Total

CFM/Side

Throw/Side

NC (dB)

CFM Total

CFM/Side

Throw/Side

NC (dB)

CFM Total

CFM/Side

Throw/Side

NC (dB)

CFM Total

CFM/Side

Throw/Side

NC (dB)

CFM Total

CFM/Side

Throw/Side

NC (dB)

CFM Total

CFM/Side

Throw/Side

NC (dB)

CFM Total

CFM/Side

Throw/Side

NC (dB)

CFM Total

CFM/Side

Throw/Side

NC (dB)

CFM Total

CFM/Side

Throw/Side

NC (dB)

CFM Total

CFM/Side

Throw/Side

NC (dB)

CFM Total

CFM/Side

Throw/Side

NC (dB)

CFM Total

CFM/Side

Throw/Side

NC (dB)

CFM Total

CFM/Side

Throw/Side

NC (dB)

CFM Total

CFM/Side

Throw/Side

NC (dB)

CFM Total

CFM/Side

Throw/Side

NC (dB)

225 x 150

9 x 6

300 x 150

12 x 6

300 x 225

12 x 9

375 x 150

15 x 6

375 x 225

15 x 9

375 x 300

15 x 12

450 x 150

18 x 6

450 x 225

18 x 9

450 x 300

18 x 12

525 x 150

21 x 6

525 x 225

21 x 9

525 x 300

21 x 12

600 x 150

24 x 6

600 x 225

24 x 9

600 x 300

24 x 12

Ak = .122

0.375

Ak = .158

0.500

Ak = .232

0.750

Ak = .195

0.625

Ak = .287

0.938

Ak = .380

1.25

Ak = .232

0.750

Ak = .343

1.125

Ak = .453

1.50

Ak = .269

0.875

Ak = .398

1.31

Ak = .523

1.75

Ak = .306

1.00

Ak = .453

1.50

Ak = .601

2.00

200

.003

.016

300

.006

.036

400

.010

.064

500

.016

.100

600

.023

.140

700

.031

.200

800

.040

.260

900

.051

.319

A B A B A B A B A B A B A B A B

75 113 150 188 225 263 300 337

31 13

4 - 6

47 19 62 26 78 32 93 39 109 45 124 52 140 59

20 20 20 20 25 29 33 37

7 - 9 5 - 78 - 11 6 - 89 - 13 7 - 910 - 15 7 - 1011 - 16 8 - 1112 - 17 8 - 1113 - 18 9 - 1214 - 20

100 150 200 250 300 350 400 450

43 14

4 - 6

65 20 86 28 108 34 129 42 151 48 172 56 194 52

20 20 20 20 27 30 34 38

9 - 12 5 - 710 - 14 6 - 811 - 16 7 - 913 - 18 7 - 1014 - 20 8 - 1115 - 21 8 - 1116 - 23 9 - 1217 - 24

150 225 300 375 450 525 600 675

61 28

5 - 8

92 41 122 56 153 69 183 84 213 98 244 112 275 125

20 20 20 22 28 32 36 40

9 - 14 6 - 911 - 16 7 - 1013 - 18 8 - 1115 - 21 9 - 1216 - 22 9 - 1317 - 24 10 - 1418 - 26 11 - 1520 - 27

125 188 250 313 375 438 500 563

56 13

4 - 6

84 20 112 26 140 33 169 37 197 44 225 50 253 58

20 20 20 21 27 31 35 39

8 - 13 5 - 710 - 15 6 - 812 - 17 7 - 914 - 19 7 - 1015 - 21 8 - 1116 - 22 8 - 1117 - 24 9 - 1218 - 26

188 281 375 469 563 656 750 845

80 28

5 - 8

120 42 159 56 200 70 240 84 279 98 319 112 359 126

20 20 20 23 29 33 37 41

10 - 14 6 - 912 - 17 7 - 1014 - 20 8 - 1116 - 23 9 - 1217 - 25 9 - 1318 - 26 10 - 1420 - 28 11 - 1621 - 30

250 375 500 625 750 875 1000 1125

100 50

7 - 9

150 75 200 100 250 125 300 150 350 175 400 200 450 225

20 20 20 25 31 35 39 43

10 - 14 8 - 1012 - 17 9 - 1214 - 20 10 - 1416 - 23 11 - 1517 - 25 12 - 1618 - 26 13 - 1720 - 28 14 - 1821 - 30

150 225 300 375 450 525 600 675

124 26

7 - 9

186 39 248 52 310 65 372 78 434 91 496 104 558 117

20 20 20 22 28 32 36 40

12 - 16 8 - 1014 - 19 9 - 1216 - 22 10 - 1418 - 25 11 - 1520 - 27 12 - 1621 - 29 13 - 1723 - 31 14 - 1824 - 33

225 338 450 563 675 788 900 1012

98 29

5 - 7

147 43 196 58 246 70 294 87 345 98 394 112 441 130

20 20 20 24 30 34 38 42

10 - 14 6 - 912 - 17 7 - 1014 - 20 8 - 1116 - 23 9 - 1217 - 25 9 - 1318 - 26 10 - 1420 - 28 11 - 1521 - 30

300 450 600 750 900 1050 1200 1350

125 50

5 - 7

187 75 250 100 312 125 375 150 437 175 500 200 562 225

20 20 20 26 32 36 40 44

10 - 14 6 - 912 - 17 7 - 1014 - 20 8 - 1116 - 23 9 - 1217 - 25 9 - 1318 - 26 10 - 1420 - 28 11 - 1521 - 30

175 263 350 438 525 613 700 787

75 12

4 - 6

113 18 150 25 188 31 225 37 262 44 300 50 337 56

20 20 20 22 28 32 36 40

10 - 14 5 - 712 - 17 6 - 814 - 20 7 - 916 - 23 7 - 1017 - 25 8 - 1118 - 26 8 - 1120 - 28 9 - 1221 - 30

263 394 525 656 788 919 1050 1181

103 28

5 - 8

154 42 206 56 258 70 309 84 360 98 413 112 484 126

20 20 20 24 30 34 38 42

12 - 16 6 - 914 - 19 7 - 1016 - 22 8 - 1118 - 25 8 - 1220 - 27 9 - 1321 - 29 10 - 1423 - 31 11 - 1524 - 33

350 525 700 875 1050 1225 1400 1575

125 50

7 - 8

187 75 250 100 312 125 375 150 437 175 500 200 562 225

20 20 20 26 32 36 40 44

12 - 16 8 - 1014 - 19 9 - 1216 - 22 10 - 14 18 - 25 11 - 1520 - 27 12 - 1621 - 29 13 - 1722 - 31 14 - 1824 - 33

200 300 400 500 600 700 800 900

87 12

4 - 6

131 81 175 25 219 31 262 37 306 44 350 50 394 56

20 20 20 23 29 33 37 41

10 - 14 5 - 712 - 17 6 - 814 - 20 7 - 916 - 23 7 - 1017 - 25 8 - 1118 - 26 8 - 1120 - 28 9 - 1221 - 30

300 450 600 750 900 1050 1200 1350

122 28

5 - 7

183 42 244 56 305 70 366 84 427 98 488 112 549 126

20 20 20 25 31 35 39 43

12 - 16 6 - 914 - 19 7 - 1016 - 22 8 - 1118 - 25 9 - 1220 - 27 9 - 1321 - 29 10 - 1423 - 31 11 - 1524 - 33

400 600 800 1000 1200 1400 1600 1800

150 50 225 75 300 100 375 125 450 150 525 175 600 200 875 225

7 - 9

20 20 20 27 33 37 41 45

13 - 18 8 - 1015 - 21 9 - 1217 - 24 10 - 1419 - 24 11 - 1521 - 30 12 - 1622 - 32 13 - 1724 - 34 14 - 1823 - 36

Rectangular Ceiling Diffusers-Supply[RCD-S]

Three Way Air Flow Pattern:

EXCELAIR Air Outlets | Technical Catalogue

A

B

A

Performance DataCeiling Diffusers

Page 15: Ceiling diffusers

Ceiling Diffusers | Performance Data

11

Throw data in feet, based on isothermal air at 100 and 50 FPM terminal velocity

Rectangular Ceiling Diffusers-Supply[RCD-S]

Four Way Air Flow Pattern:

Size(mm)

&(Inches)

Area Factor(AK)

Neck Area(Sq. ft.)

Neck Velocity (fpm)

Velocity Pressure in W.G.

Total Pressure in W.G.

Side

CFM Total

CFM/Side

Throw/Side

NC (dB)

CFM Total

CFM/Side

Throw/Side

NC (dB)

CFM Total

CFM/Side

Throw/Side

NC (dB)

CFM Total

CFM/Side

Throw/Side

NC (dB)

CFM Total

CFM/Side

Throw/Side

NC (dB)

CFM Total

CFM/Side

Throw/Side

NC (dB)

CFM Total

CFM/Side

Throw/Side

NC (dB)

CFM Total

CFM/Side

Throw/Side

NC (dB)

CFM Total

CFM/Side

Throw/Side

NC (dB)

CFM Total

CFM/Side

Throw/Side

NC (dB)

CFM Total

CFM/Side

Throw/Side

NC (dB)

CFM Total

CFM/Side

Throw/Side

NC (dB)

CFM Total

CFM/Side

Throw/Side

NC (dB)

CFM Total

CFM/Side

Throw/Side

NC (dB)

CFM Total

CFM/Side

Throw/Side

NC (dB)

225 x 150

9 x 6

300 x 150

12 x 6

300 x 225

12 x 9

375 x 150

15 x 6

375 x 225

15 x 9

375 x 300

15 x 12

450 x 150

18 x 6

450 x 225

18 x 9

450 x 300

18 x 12

525 x 150

21 x 6

525 x 225

21 x 9

525 x 300

21 x 12

600 x 150

24 x 6

600 x 225

24 x 9

600 x 300

24 x 12

Ak = .122

0.375

Ak = .158

0.500

Ak = .232

0.750

Ak = .195

0.625

Ak = .287

0.938

Ak = .380

1.25

Ak = .232

0.750

Ak = .343

1.125

Ak = .453

1.50

Ak = .269

0.875

Ak = .398

1.31

Ak = .523

1.75

Ak = .306

1.00

Ak = .453

1.50

Ak = .601

2.00

200

.003

.015

300

.006

.033

400

.010

.058

500

.016

.091

600

.023

.130

700

.031

.180

800

.040

.230

900

.051

.310

A B A B A B A B A B A B A B A B

75 113 150 188 225 263 300 337

25 12

4 - 6

38 18 50 25 63 31 75 37 87 44 100 50 112 56

20 20 20 20 25 29 33 37

7 - 9 5 - 78 - 10 6 - 89 - 12 7 - 910 - 14 7 - 1011 - 15 8 - 1112 - 16 8 - 1113 - 17 9 - 1214 - 18

100 150 200 250 300 350 400 450

38 12

4 - 6

57 18 76 24 94 31 113 37 133 42 152 48 171 54

20 20 20 20 27 30 34 38

9 - 11 5 - 710 - 13 7 - 811 - 15 7 - 913 - 17 7 - 1014 - 18 8 - 1115 - 20 8 - 1116 - 21 8 - 1217 - 23

150 225 300 375 450 525 600 675

47 28

5 - 8

70 42 94 56 117 70 141 84 164 98 138 112 211 126

20 20 20 22 28 32 36 40

8 - 10 6 - 99 - 12 7 - 1010 - 14 8 - 1111 - 16 9 - 1212 - 17 9 - 1313 - 18 10 - 1414 - 20 11 - 1515 - 21

125 188 250 313 375 438 500 563

50 12

4 - 6

75 18 100 25 125 31 150 37 175 44 200 50 225 56

20 20 20 21 27 31 35 39

9 - 12 5 - 710 - 14 6 - 811 - 16 7 - 913 - 18 7 - 1014 - 20 8 - 1115 - 21 9 - 1116 - 23 9 - 1217 - 24

188 281 375 469 563 656 750 845

66 28

5 - 8

99 42 132 56 165 70 198 84 230 98 263 112 296 126

20 20 20 23 29 33 37 41

9 - 14 6 - 911 - 16 7 - 1013 - 18 8 - 1115 - 21 9 - 1216 - 22 9 - 1317 - 24 10 - 1418 - 25 11 - 1520 - 27

250 375 500 625 750 875 1000 1125

75 50

7 - 8

112 75 150 100 187 125 225 150 262 175 300 200 337 225

20 20 20 25 31 35 39 43

9 - 12 8 - 1010 - 14 9 - 1211 - 16 10 - 1413 - 18 11 - 1514 - 20 12 - 1615 - 21 13 - 1716 - 23 14 - 1817 - 24

150 225 300 375 450 525 600 675

63 12

4 - 6

94 18 125 25 158 31 188 37 220 42 250 50 283 54

20 20 20 22 28 32 36 40

9 - 14 5 - 711 - 16 6 - 813 - 18 7 - 915 - 21 7 - 1018 - 22 8 - 1117 - 24 8 - 1118 - 25 9 - 1220 - 27

225 338 450 563 675 788 900 1012

85 28

5 - 8

126 42 169 56 211 70 254 84 296 98 338 112 380 126

20 20 20 24 30 34 38 42

10 - 14 6 - 912 - 17 7 - 1014 - 20 8 - 1116 - 23 9 - 1217 - 25 9 - 1318 - 26 10 - 1420 - 28 11 - 1521 - 30

300 450 600 750 900 1050 1200 1350

100 50

7 - 8

150 75 200 100 250 125 300 150 350 175 400 200 450 225

20 20 20 26 32 36 40 44

10 - 14 8 - 1012 - 17 9 - 1214 - 20 10 - 1416 - 23 11 - 1517 - 25 12 - 1618 - 26 13 - 1720 - 28 14 - 1821 - 30

175 263 350 438 525 613 700 787

75 12

4 - 6

113 18 150 25 188 31 225 37 262 44 300 50 337 56

20 20 20 22 28 32 36 40

10 - 14 5 - 712 - 17 6 - 814 - 20 7 - 916 - 23 7 - 1017 - 25 8 - 1118 - 26 8 - 1120 - 28 9 - 1221 - 30

263 394 525 656 788 919 1050 1181

103 28

5 - 8

154 42 206 56 258 70 309 84 360 98 413 112 484 126

20 20 20 24 30 34 38 42

12 - 16 6 - 914 - 19 7 - 1016 - 22 8 - 1118 - 25 8 - 1220 - 27 9 - 1321 - 29 10 - 1423 - 31 11 - 1524 - 33

350 525 700 875 1050 1225 1400 1575

125 50

7 - 8

187 75 250 100 312 125 375 150 437 175 500 200 562 225

20 20 20 26 32 36 40 44

12 - 16 8 - 1014 - 19 9 - 1216 - 22 10 - 14 18 - 25 11 - 1520 - 27 12 - 1621 - 29 13 - 1722 - 31 14 - 1824 - 33

200 300 400 500 600 700 800 900

87 12

4 - 6

131 81 175 25 219 31 262 37 306 44 350 50 394 56

20 20 20 23 29 33 37 41

10 - 14 5 - 712 - 17 6 - 814 - 20 7 - 916 - 23 7 - 1017 - 25 8 - 1118 - 26 8 - 1120 - 28 9 - 1221 - 30

300 450 600 750 900 1050 1200 1350

122 28

5 - 7

183 42 244 56 305 70 366 84 427 98 488 112 549 126

20 20 20 25 31 35 39 43

12 - 16 6 - 914 - 19 7 - 1016 - 22 8 - 1118 - 25 9 - 1220 - 27 9 - 1321 - 29 10 - 1423 - 31 11 - 1524 - 33

400 600 800 1000 1200 1400 1600 1800

150 50 225 75 300 100 375 125 450 150 525 175 600 200 875 225

7 - 9

20 20 20 27 33 37 41 45

13 - 18 8 - 1015 - 21 9 - 1217 - 24 10 - 1419 - 24 11 - 1521 - 30 12 - 1622 - 32 13 - 1724 - 34 14 - 1823 - 36

EXCELAIR Air Outlets | Technical Catalogue

B

A

B

A

Performance DataCeiling Diffusers

Page 16: Ceiling diffusers

Ceiling Diffusers | Performance Data

12

One Way Air Flow Pattern:

Size(mm)

&Inches

Neck Area(Sq.ft)

Neck Velocity (fpm) 200 300 400 500 600 700 800 900

Velocity Pressure (w.g) .004 .007 .009 .014 .019 .025 .035 .045

Negative Static Pressure(in. w.g)

.051 .113 .199 .320 .444 .617 .789 .962

225x1500.375

CFM 74 112 152 186 226 259 300 336

NC 19 19 20 21 23 27 31 36

300x1500.500

CFM 95 145 195 245 295 345 395 445

NC 19 19 20 20 25 28 32 37

300x2250.750

CFM 143 218 293 368 443 518 593 668

NC 19 19 20 21 26 30 34 39

375x1500.625

CFM 124 186 247 310 372 433 497 561

NC 19 19 20 21 25 29 33 38

375x2250.938

CFM 188 280 369 463 561 652 747 839

NC 20 20 20 21 27 31 35 40

375x3001.25

CFM 244 269 496 621 746 871 993 1121

NC 20 20 20 23 29 33 37 42

450x1500.750

CFM 145 220 295 370 445 520 595 670

NC 20 20 20 20 26 30 36 39

450x2251.125

CFM 220 332 443 559 662 783 893 1011

NC 19 20 20 22 28 32 36 41

450x3001.50

CFM 295 445 595 745 895 1045 1195 1345

NC 20 20 20 24 30 34 38 43

525x1500.875

CFM 170 658 345 433 520 609 695 782

NC 20 20 20 20 26 30 34 39

525x2251.31

CFM 260 391 522 553 785 916 1042 1176

NC 20 20 20 20 28 32 36 41

525x3001.75

CFM 345 520 695 870 1045 1220 1395 1570

NC 20 20 20 20 30 34 38 43

600x1501.00

CFM 195 295 395 495 595 690 790 890

NC 20 20 20 21 27 31 35 40

600x2251.50

CFM 290 440 590 740 890 1040 1190 1340

NC 20 20 20 23 29 33 37 42

600x3002.00

CFM 390 590 790 990 1190 1390 1590 1790

NC 20 20 20 25 31 35 39 44

9 x 6

12 x 6

12 x 9

15 x 6

15 x 9

15 x 12

18 x 6

18 x 9

18 x 12

21 x 6

21 x 9

21 x 12

24 x 6

24 x 9

24 x 12

EXCELAIR Air Outlets | Technical Catalogue

Performance DataCeiling Diffusers

Rectangular Ceiling Diffusers-Return[RCD-R]

Page 17: Ceiling diffusers

Ceiling Diffusers | Performance Data

13

Two Way Airflow Pattern:

Size(mm) Neck Area

(Sq.ft)

Neck Velocity (fpm) 200 300 400 500 600 700 800 900

Velocity Pressure (w.g) .004 .007 .009 .014 .019 .025 .035 .045

Negative Static Pressure(in. w.g)

.049 .109 .193 .302 .422 .602 .782 .962

225x1500.375

CFM 72 111 147 185 222 260 297 332

NC 19 19 20 21 23 27 31 36

300x1500.500

CFM 90 140 190 240 290 340 390 440

NC 19 19 20 20 25 28 32 37

300x2250.750

CFM 145 220 295 370 445 520 595 670

NC 19 19 20 21 26 30 34 39

375x1500.625

CFM 127 190 252 315 376 440 502 565

NC 19 19 20 21 25 29 33 38

375x2250.938

CFM 185 276 370 464 558 651 745 840

NC 20 20 20 21 27 31 35 40

375x3001.25

CFM 245 370 495 620 745 870 995 1120

NC 20 20 20 23 29 33 37 42

450x1500.750

CFM 145 220 295 370 445 520 595 670

NC 20 20 20 20 26 30 36 39

450x2251.125

CFM 220 333 445 558 670 783 895 1007

NC 19 20 20 22 28 32 36 41

450x3001.50

CFM 295 445 595 745 895 1045 1195 1345

NC 20 20 20 24 30 34 38 43

525x1500.875

CFM 170 258 345 433 520 608 895 782

NC 20 20 20 20 26 30 34 39

525x2251.31

CFM 258 389 520 651 783 914 1045 1176

NC 20 20 20 20 28 32 36 41

525x3001.75

CFM 345 520 695 870 1045 1220 1395 1570

NC 20 20 20 20 30 34 38 43

600x1501.00

CFM 195 295 395 495 595 695 795 895

NC 20 20 20 21 27 31 35 40

600x2251.50

CFM 295 445 595 745 895 1045 1195 1345

NC 20 20 20 23 29 33 37 42

600x3002.00

CFM 395 595 795 995 1195 1395 1595 1795

NC 20 20 20 25 31 35 39 44

9 x 6

12 x 6

12 x 9

15 x 6

15 x 9

15 x 12

18 x 6

18 x 9

18 x 12

21 x 6

21 x 9

21 x 12

24 x 6

24 x 9

24 x 12

&(Inches)

EXCELAIR Air Outlets | Technical Catalogue

Performance DataCeiling Diffusers

Rectangular Ceiling Diffusers-Return[RCD-R]

Page 18: Ceiling diffusers

Ceiling Diffusers | Performance Data

14

Three Way Airflow Pattern:

Size(mm)

Neck Area(Sq.ft)

Neck Velocity (fpm) 200 300 400 500 600 700 800 900

Velocity Pressure (w.g) .004 .007 .009 .014 .019 .025 .035 .045

Negative Static Pressure(in. w.g)

.040 .091 .164 .252 .379 .506 .664 .807

225x1500.375

CFM 72 111 147 185 222 260 297 332

NC 19 19 20 21 23 27 31 36

300x1500.500

CFM 90 140 190 240 290 340 390 440

NC 19 19 20 20 25 28 32 37

300x2250.750

CFM 145 220 295 370 445 520 595 670

NC 19 19 20 21 26 30 34 39

375x1500.625

CFM 127 190 252 315 376 440 502 565

NC 19 19 20 21 25 29 33 38

375x2250.938

CFM 185 276 370 464 558 651 745 840

NC 20 20 20 21 27 31 35 40

375x3001.25

CFM 245 370 495 620 745 870 995 1120

NC 20 20 20 23 29 33 37 42

450x1500.750

CFM 145 220 295 370 445 520 595 670

NC 20 20 20 20 26 30 36 39

450x2251.125

CFM 220 333 445 558 670 783 895 1007

NC 19 20 20 22 28 32 36 41

450x3001.50

CFM 295 445 595 745 895 1045 1195 1345

NC 20 20 20 24 30 34 38 43

525x1500.875

CFM 170 258 345 433 520 608 895 782

NC 20 20 20 20 26 30 34 39

525x2251.31

CFM 258 389 520 651 783 914 1045 1176

NC 20 20 20 20 28 32 36 41

525x3001.75

CFM 345 520 695 870 1045 1220 1395 1570

NC 20 20 20 20 30 34 38 43

600x1501.00

CFM 195 295 395 495 595 695 795 895

NC 20 20 20 21 27 31 35 40

600x2251.50

CFM 295 445 595 745 895 1045 1195 1345

NC 20 20 20 23 29 33 37 42

600x3002.00

CFM 395 595 795 995 1195 1395 1595 1795

NC 20 20 20 25 31 35 39 44

9 x 6

12 x 6

12 x 9

15 x 6

15 x 9

15 x 12

18 x 6

18 x 9

18 x 12

21 x 6

21 x 9

21 x 12

24 x 6

24 x 9

24 x 12

&Inches

EXCELAIR Air Outlets | Technical Catalogue

Performance DataCeiling Diffusers

Rectangular Ceiling Diffusers-Return[RCD-R]

Page 19: Ceiling diffusers

Ceiling Diffusers | Performance Data

15

Performance DataCeiling Diffusers

Rectangular Ceiling Diffusers-Return[RCD-R]

EXCELAIR Air Outlets | Technical Catalogue

Four Way Airflow Pattern:

Size(mm) Neck Area

(Sq.ft)

Neck Velocity (fpm) 200 300 400 500 600 700 800 900

Velocity Pressure (w.g) .004 .007 .009 .014 .019 .025 .035 .045

Negative Static Pressure(in. w.g)

.039 .090 .163 .251 .378 .505 .663 .806

225x1500.375

CFM 72 111 147 185 222 260 297 332

NC 19 19 20 21 23 27 31 36

300x1500.500

CFM 90 140 190 240 290 340 390 440

NC 19 19 20 20 25 28 32 37

300x2250.750

CFM 145 220 295 370 445 520 595 670

NC 19 19 20 21 26 30 34 39

375x1500.625

CFM 127 190 252 315 376 440 502 565

NC 19 19 20 21 25 29 33 38

375x2250.938

CFM 185 276 370 464 558 651 745 840

NC 20 20 20 21 27 31 35 40

375x3001.25

CFM 245 370 495 620 745 870 995 1120

NC 20 20 20 23 29 33 37 42

450x1500.750

CFM 145 220 295 370 445 520 595 670

NC 20 20 20 20 26 30 36 39

450x2251.125

CFM 220 333 445 558 670 783 895 1007

NC 19 20 20 22 28 32 36 41

450x3001.50

CFM 295 445 595 745 895 1045 1195 1345

NC 20 20 20 24 30 34 38 43

525x1500.875

CFM 170 258 345 433 520 608 895 782

NC 20 20 20 20 26 30 34 39

525x2251.31

CFM 258 389 520 651 783 914 1045 1176

NC 20 20 20 20 28 32 36 41

525x3001.75

CFM 345 520 695 870 1045 1220 1395 1570

NC 20 20 20 20 30 34 38 43

600x1501.00

CFM 195 295 395 495 595 695 795 895

NC 20 20 20 21 27 31 35 40

600x2251.50

CFM 295 445 595 745 895 1045 1195 1345

NC 20 20 20 23 29 33 37 42

600x3002.00

CFM 395 595 795 995 1195 1395 1595 1795

NC 20 20 20 25 31 35 39 44

&(Inches)

9 x 6

12 x 6

12 x 9

15 x 6

15 x 9

15 x 12

18 x 6

18 x 9

18 x 12

21 x 6

21 x 9

21 x 12

24 x 6

24 x 9

24 x 12

B

A

B

A

Page 20: Ceiling diffusers

Ceiling Diffusers | Stamped Square Ceiling Diffuser

16

Construction & Application

Assembling Features

Frames/ Blades Stamped Aluminium Sheets. (No joints / gaps at corners)

Finish Electrostatic Polyester powder coated system/ RAL code

Installation Ceiling or duct mounting

Shape Square

Diffusers are 4-way, discharges air equal in four horizontal direction.Frame and cores are from stamped Aluminium sheets.

Diffusers are cone type with individual cores manufactured from single piece of die-formedAluminium sheets.

Cores are assembled together and held in position by Aluminium pins loaded with steels springs.

Cores are easily removable and interchangeable to provide maximum flexibility in installation,maintenance and control of damper.

Aluminium opposite blade damper is fixed to the outer frame by Aluminium rivets.

Damper blades are separated from damper frame by means of Nylon bushes

Opposed blade damper is lever operated, accessible through face of the diffuser from below theceiling without need of any special tools. Screw operated damper as option is available.

Foam Gasket can be sealed around back of the frame as option to avoid air leakage.

EXCELAIR Air Outlets | Technical Catalogue

Stamped Square Ceiling Diffuser [SSCD]Ceiling Diffusers

Diffusers are used in all HVAC systems as a part of room air distribution sub – systems.

High level of comfort in indoor air flow and higher performance level can be achieved.

Ceiling Diffuser is known for its architectural appearance and solid construction along with an easy andeven air distribution, flow equalization, and maximum sound attenuation.

Easily removable internal assembly for cleaning or servicing, if necessary.

Inhibits dirt accumulation and offers negligible resistance to air flow.

Ceiling diffusers are efficient in handling high air volumes at a comparatively low noise levels to offer even disbursement of air.

Page 21: Ceiling diffusers

Ceiling Diffusers | Dimensional Details

17

Standard Sizemm Inches A (mm) B (mm) C (mm) D (mm) E (mm)

150 x 150 6 x 6 131 144 290 45 85

225 x 225 9 x 9 207 220 365 45 85

300 x 300 12 x 12 278 294 440 45 85

375 x 375 15 x 15 355 369 515 45 85

450 x 450 18 x 18 430 444 595/600 45 85

Face Size C

Duct Size B

A

Ceiling Opening size = C - 20mm

D

E

Face Size C

D

Duct Size B

A

Without Damper With Damper

Ceiling Opening size = C - 20mm

Performance Data [SSCD]

Throw data in feet, based on isothermal air at 150 and 150 FPM terminal velocity

Noise Criteria ratings were determined by subtracting a room absorption of 10dB from the Sound Powder Level data.

Size(mm)

&(Inches)

Area Factor(AK)

Neck Area(Sq. ft.)

Neck Velocity (fpm)

Velocity Pressure in W.G.

CFM Total

Pt (In.w.g)

Throw/Side

NC (dB)

CFM Total

Pt (In.w.g)

Throw/Side

NC (dB)

CFM Total

Pt (In.w.g)

Throw/SideNC (dB)

CFM Total

Pt (In.w.g)

Throw/Side

NC (dB)

CFM Total

Pt (In.w.g)

Throw/Side

NC (dB)

150 x 150

6 x 6

225 x 225

9 x 9

300 x 300

12 x 12

375 x 375

15 x 15

450 x 450

18 x 18

Ak = 0.074

An=0.174

Ak = 0.164

An=0.444

Ak = 0.297

An=0.841

Ak = 0.435

An=1.361

Ak = 0.501

An=1.563

200

0.0013

36

0.0014

1-4

<15

90

0.0042

2-6

<15

168

0.0082

4-11

<15

287

0.0185

6-13

<15

345

0.024

7-14

<15

44

0.01

1.5-5

<15

111

0.012

3-8

<15

210

0.015

5-13

<15

349

0.0255

8-14

<15

417

0.0306

9-15

18

52

0.0174

2-6

<15

132

0.019

4-9

<15

252

0.022

6-14

<15

411

0.0326

9-15

16

489

0.038

11-16

20

61

0.028

3-7

<15

155

0.033

5-10

15

294

0.039

7-15

16

474

0.040

11-16

17

562

0.041

13-17

23

70

0.039

4-8

<15

178

0.046

6-11

17

336

0.055

9-16

18

536

0.059

13-20

19

633

0.062

15-21

25

87

0.061

5-9

15

222

0.072

7-13

19

420

0.088

11-18

25

661

0.098

15-21

28

777

0.103

17-22

30

105

0.082

6-11

16

267

0.098

9-15

22

504

0.121

13-20

29

786

0.137

17-22

33

921

0.145

19-23

34

122

0.103

7-12

17

310

0.124

10-16

24

588

0.154

15-22

33

911

0.176

19-24

36

1066

0.187

20-25

38

139

0.124

8-13

18

355

0.150

12-18

26

672

0.187

17-23

37

1036

0.214

21-25

39

1210

0.227

22-27

41

250 300 350 400 500 600 700 800

0.0028 0.0057 0.0087 0.0117 0.0117 0.0237 0.0298 0.0380

EXCELAIR Air Outlets | Technical Catalogue

Dimensional DetailsCeiling Diffusers

Page 22: Ceiling diffusers

Ceiling Diffusers | Engineering Data

18

Engineering DataCeiling Diffusers

Extremely quiet environment, Suppressed speech is quite audible, Suitable for acute pickup of all sounds.

Very quiet office, suitable for large conferences; Telephone use satisfactory.

Quiet office; satisfactory for conference at a 15 ft. table; normal voice 10-30.ft.; telephone use satisfactory.

Satisfactory for conferences at a 6-8 ft. table; normal voice 6-12 ft.; telephone use satisfactory.

Satisfactory for conferences at a 4-5 ft. table; normal voice 3-6 ft.; raised voice 6-12 ft.; telephone use occasionally difficult.

Unsatisfactory for conferences of more than two or three persons; normal. Voice 1-2 ft.; raised voice 3-6 ft.; telephone use slightly difficult.

NCCurve

CommunicationEnvironment

TypicalOccupancy

Broadcasting studios, concert halls, music rooms.

Residences theatres, libraries, executive offices, director’s rooms

Private offices, schools, hotel rooms, court rooms, churches, hospital rooms.

General offices, labs, dining rooms.

Retail stores cafeterias, lobby areas, large drafting & engineering offices, reception areas

Computer rooms, stenographic pools, print machine rooms, process areas.

BelowNC 25

NC 30

NC 35

NC 40

NC 45

BelowNC 50

Sound DataDiffusers should be selected for recommended

NC rating or maximum Vk velocity for a specific

application. The engineering performance data

for specific diffuser type contains the NC rating

and Vk Outlet velocity.

Broadcasting studios 500

Residences 750

Apartments 750

Churches 750

Hotel bedroom 750

Legitimate theatres 1000

Private offices, acoustically treated 1000

Motion theatres 1250

Private office, not treated 1250

General offices 1500

Stores, upper floors 1500

Stores, main floors 1500

Industrial building 2000

Application Velocity Vk FPM

Damper Opening % Total pressure drop multiplier NC addition to diffuser rating

100

50

25

X1.0

X1.6

X2.7

+0

+7

+15

Closing the damper of ceiling diffuser, restricts the flow of air, thereby increasing the pressure drop and decreasing the cfm. In doing these things, the damper also generates sound which leads to increase in the NC level. Table above shows the NC addition of throttled dampers.

Table 1: Recommended NC Criteria

Table 2: Recommended MaximumVk Velocity

EXCELAIR Air Outlets | Technical Catalogue

Page 23: Ceiling diffusers

Ceiling Diffusers | Engineering Data

19

How To Select, Size And Balancing

Selection Procedure:

The area to be served by a diffuser should be divided into equal squares. It is not necessary to locate outlet in the centerof discharge area, since 3 - way, 2 - way and 1 - way pattern style can be used to compensate for other location.1 - way opposite pattern style may be used for rectangular areas such as corridors.

Sizing Procedure:

1 -After selecting pattern style of diffuser required to properly cover the area to be conditioned, it is then necessary to be sure the outlet has been sized in accordance with length of throw, static pressure, velocity, and sound level to prevent any increase in environmental sound level from the diffuser and its accessories.

2- Using CFM per outlet as selected in method described in “Selection Procedure” above and select NC level from table 1 or recommended maximum Vk velocity from table 2 suitable for type of occupancy.

3- Select the proper size of diffuser from engineering performance data to meet your requirement.

4- If sizes other than those published are desired, consult factory.

5- Total pressure is indicated on performance data pages which is equal to sum of neck velocity pressure plus static pressure required.

Balancing Procedure:

For Square And Rectangular Diffusers:

To determine CFM use an Alnor Velometer with jet 2220-A tip positioned as shown in fig. 1. Take readings at pointsshown by dots (figures 2 through 6) on all active discharge sides. On larger sizes, over 24 x 24, take at leasttwo or three reading per active side and average the total readings to arrive at jet velocity Vk After selecting theproper Ak value from the engineering performance data, multiply the average velocity times the Ak to determine CFM.

Air Flow Rate Measurement

Velocity jet2220 A

FIG.2 FIG.3 FIG.4

FIG.6FIG.5FIG.1

EXCELAIR Air Outlets | Technical Catalogue

Engineering DataCeiling Diffusers

Page 24: Ceiling diffusers

Ceiling Diffusers | Engineering Data

20

EXCELAIR Air Outlets | Technical Catalogue

Square & Rectangular Return Ceiling Diffusers

0

3 2½ 2 1½ 1 ½ 0

1 2 4 6 9 10

Combining Effects of Sound Sources

Octave Pass Bands in Cycles Per Second

45 - 90 - 180 - 355 - 710 - 1400 - 2800 - 5600 - 1120080

70

60

50

40

30

20

10 63 125 250 500 1000 2000 4000 8000

5 10 2 1000 2 5 10000

NC Curves

Oct

ave

Band

Sou

nd P

ress

ure

Leve

l in

dB R

E 0.

0002

Mic

roba

r (L

p)

Oct

ave

Band

Sou

nd P

ress

ure

Leve

l in

dB R

E 10

-12

wat

t (L

w)

Frequency - Hz

Approximate Threshold of Hearing

for Continuous Noise NC 10

Difference between two sources to be combined (dB)

Number to be added to higher level to obtain combined effect (dB)

Engineering DataCeiling Diffusers

Page 25: Ceiling diffusers

Ceiling Diffusers | Engineering Data

21

Engineering DataCeiling Diffusers

EXCELAIR Air Outlets | Technical Catalogue

10.000

10.000

9.000

9.000

8.000

8.000

7.000

7.000

6.000

6.000

5.000

5.000

4.000

4.000

3.500

3.500

3.000

3.000

2.500

2.500

2.000

2.000

1.800

1.600

1.600

1.400

1.400

1.200

1.200

1.000

1.000

900

900

800

800

700

700

600

600

500

500

400

400

350

350

300

300

280260240220200

180

160

140

120

100 170

200

250

450

1.100

1.700

4.500

11.00012.000

14.000

17.000 10.0

9.0

8.0

7.0

6.0

5.0

4.0

3.5

3.0

2.5

2.01.8

1.6

1.4

1.2

1.0

.9

.8

.7

.6

.5

.4

.35

.3.28.26.24.22.2

.18

.16

.14

.12

1 2.54

3.0

3.5

4.5

5.0

6.0

7.0

8.0

9.010.0

12.0

14.0

16.0

18.020.0

22.0

25.4

30.0

35.0

40.0

45.050.0

60.0

70.0

80.0

90.0100.0

120.0

140.0

160.0

180.0200.0

220.0

254.0

Air Flow Conversion Pressure Conversion

C.F.M m3/h INS. mm.

Assembly rooms 4 - 8Bakeries 20 - 30Banks/Building societies 4 - 8Bathrooms 6 - 10Bedrooms 2 - 4Billiard rooms 6 - 8Boiler rooms 15 - 30Cafes and coffee bars 10 - 12Canteens 8 - 12Cellars 3 - 10Churches 1 - 3Cinemas and theatres 10 - 15Club rooms 12 minimumCompressor rooms 10 - 12Conference rooms 8 - 12Dance halls 12 minimumElectroplating shops 10 - 12Engine rooms 15 - 30Entrance halls, corridors 3 - 5Factories and workshops 8 - 10Foundries 15 - 30Garages 6 - 8Glasshouses 25 - 60Gymnasiums 6 minimumHairdressing salons 10 - 15Hospitals - sterilizing 15 - 25Kitchens - domestic 15 - 20 - commercial 30 minimumLaboratories 6 - 15Laundries 10 - 30Lavatories 6 - 15Lecture theatres 5 - 8Libraries 3 - 5Living rooms 3 - 6Offices 6 - 10Paint shops (not cellulose) 10 x 20Photo and X-ray darkrooms 10 - 15Public house bars 12 minimumRecording control rooms 15 - 25Recording studios 10 - 12Restaurants 5 - 7Schoolrooms 5 - 7Shops and supermarkets 8 - 5Shower baths 15 - 20Stores and warehouses 3 - 6Squash courts 4 minimumSwimming baths 10 - 15Utility rooms 15 - 20Welding shops 15 - 30

Airflow / Pressure Conversion ChartRecommended Air Changes Per Hour

(For Ventilation)

Increase by 50% where heavy smoking occurs or if the room is

in underground.

Page 26: Ceiling diffusers

Ceiling Diffusers | Quick Selection Tables

22

EXCELAIR Air Outlets | Technical Catalogue

Square Ceiling Diffusers

Rectangular Ceiling Diffusers

Dimensions

Size (mm) CFM Range

225 x 150

300 x 150

300 x 225

375 x 150

375 x 225

375 x 300

450 x 150

75 - 335

100 - 450

150 - 675

152 - 560

190 - 845

250 - 1125

150 - 675

Dimensions

Size (mm) CFM Range

450 x 225

450 x 300

525 x 150

525 x 225

600 x 150

600 x 225

600 x 300

225 - 1010

300 - 1350

175 - 785

260 - 1180

200 - 900

300 - 1350

400 - 1800

Size (mm) CFM Range

150 x 150

225 x 225

300 x 300

375 x 375

450 x 450

525 x 525

600 x 600

50 - 225

100 - 500

200 - 900

300 - 1400

450 - 2000

600 - 2750

800 - 3600

Dimensions

Dimensions Dimensions

Quick Selection TablesCeiling Diffusers

Page 27: Ceiling diffusers

Ceiling Diffusers | Installation

23

EXCELAIR Air Outlets | Technical Catalogue

97 mm

Listed Size

Ceiling Opening=Listed Size + 89mm

Listed Size + 140mm

30mm 60mm

30O

OBD

Connected to Duct

Connected to Plenum Box

Rested in False Ceiling

Duct

Ceiling Level

Visible Ceiling Level

Ceiling Level

False Ceiling Level

Ceiling Level

False Ceiling Level

InstallationCeiling Diffusers

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Ceiling Diffusers | Product Testing

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EXCELAIR Air Outlets | Technical Catalogue

Test Method

Introduction

According to the ETL - Intertek Testing Laboratories Inc the given performance tables includes the test results conducted on three Supply Air Diffusers with Damper.The result includes static pressure, area factor, throw and sound power level.The samples were selected and supplied by Century Mechanical Systems Factory in April 12, 2010. Extrapolations and Interpolations were applied to cover all range of sizes and parameters.

The Samples were tested in accordance with 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. Acoustical data were obtained employing a Bruel & Kjaer Digital Frequency Pulse Analyzer and analyzed on a Compaq Computer. The reference sound source used for this test was a calibrated Bruel & Kjaer Type 4204, which conforms to the above standard. The sample was installed in the facility and supplied with measured volumes of air. The static pressure was measured 1 ½ duct diameters upstream of the inlet.

Noise Criteria (NC) ratings were determined by subtracting a room absorption of 10dB from the Sound Powder Level data. Air volumes were calculated in CFM. Throw values were derived at terminal velocities of 150fpm, 100fpm and 50fpm.

Product testingCeiling Diffusers

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Ceiling Diffusers | Ordering Requisites

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EXCELAIR Air Outlets | Technical Catalogue

1. Type Square Ceiling Diffuser - Supply SCD-SSquare Ceiling Diffuser - Return SCD-RRectangular Ceiling Diffuser - Supply RCD-SRectangular Ceiling Diffuser - Return RCD-RStamped Square Ceiling Diffuser - Supply SSCD-SStamped Square Ceiling Diffuser - Return SSCD-R

2. Air Flow Patterns One Way Air Flow Pattern 1WTwo Way Air Flow Pattern 2W Three Way Air Flow Pattern 3WFour Way Air Flow Pattern 4W

3. Number Of Units Nos

4. Size WxH

5. Accessories Equalizing Grid ESquare to Round Neck Adapter S-RSquare to Square Neck Adapter S-S

6. Colour Standard Colour RAL9010Mill Finish M Other Colour (RAL CODE)

SCD - S 4 W 50 150 x 150 mm S-S RAL 9010

150 X 150 mm, 50 units of Square Ceiling Diffuser-Supply , 4way, with square to square adapter, RAL 9010 finish.

Example

Ordering RequisitesCeiling Diffusers

1 2 3 4 5 6

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Ceiling Diffusers | Notes

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EXCELAIR Air Outlets | Technical Catalogue

NotesCeiling Diffusers

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Ceiling Diffusers | Notes

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EXCELAIR Air Outlets | Technical Catalogue

NotesCeiling Diffusers

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Ceiling Diffusers | Notes

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EXCELAIR Air Outlets | Technical Catalogue

NotesCeiling Diffusers

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EXCELAIR GD1000 SERIES Available in RAL 9010 & 9016 Colors.

All other colors are available on request.

Coyright

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Tel: +971 4 3416337, Fax : +971 4 3416338P.O Box: 60270, Dubai, United Arab [email protected]

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