CEILING DIFFUSER - technalco · A = Diffuser Neck size N = Nominal size = Duct size ‘D’ F =...

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CHAPTER-4CEILING DIFFUSERS INDEXo Supply,Return, Diffusers

o Combination Models of Supply and Return Air

o Standard Directional Core Patterns

o Engineering and Performance Data

o Notes on Selector

o Smoke diffusion Pattern Pictures

o Test Results from ETL

o Effective Free Area

o Selection Tables

o Easy Selection Graphs

o Ceiling Diffusers Fixing Details

o Ordering Data

SUPPLY, RETURN, EXTRACT CEILING DIFFUSERS

Square and rectangular models:

TECNALCO directional diffusers are a popular, versatile choice for many heating, ventilating and cooling applications. There is a style, size, pattern to fit every conceivable installation and shape and size of space to be conditioned. The diffuser directional pattern can be selected to deliver the appropriate amount of conditioned air in to the areas, where it is needed.

TECNALCO ceiling diffusers can supply large volumes of conditioned air at acceptable sound levels and pressure drops, when over all dimensions of the diffuser are limited by modular ceiling systems or architectural considerations.The excellent performance is completed by a pleasing appearance that hormonizes with various architectural details, especially in modular ceiling systems.

Features:

Rear dampers and ancillaries are of aluminium mill finish. Available with black matt finish in colour onrequest.

Face is of extruded aluminium natural anodised or bronze anodised colour. Available on request in any colour, powder coated in satin, glossy or matt finish.

Available with optional extended panels to suit modular ceilings.

Available in square and rectangluar shapes, with different directions of discharging core styles for 1, 2, 3 and 4 way in horizontal path

Internal core is of spiral spring loaded, easily removable type, to provide easy access and for adjustment of key operated opposed blade damper.

Material is of extruded aluminium in natural anodised finish.

Available with Flanged border (standard type) or Recessed border (Type ‘C’).

TECNALCOCEILING DIFFUSERS

3 4


SUPPLY, RETURN, EXTRACT CEILING DIFFUSERS SUPPLY, RETURN, EXTRACT CEILING DIFFUSERS

Standard Type. Designed for flush surface mountingon all types of ceilings, custom made in a variety ofcore patterns.

This type of construction is of standard model ofTECNALCO with flanged border.

Available in a variety of flange styles to suit variousceiling applications.

Available with optional extended panels to suitmodular ceilings.

Wide selection of sizes and core patterns.

Directional core easily removable at diffuser face.

Fecilitates replacement of core pattern afterinstallation, should a revision be required.

Standard sizes:Neck and overall dimensions of square-type models

L x W mm mm mmx x y m x n

150 x 150 145 x 145

220 x 220

295 x 295

370 x 370

445 x 445

520 x 520

595 x 595

452 x 452

293 x 293

368 x 368

443 x 443

518 x 518

593 x 593

668 x 668

743 x 743

600 x 600

225 x 225

300 x 300

375 x 375

450 x 450

525 x 525

600 x 600

457 x 457 *

N = D = Duct sizeN = Nominal size

A = Neck size of the diffuserB = Face side (outer to outer size)

N = Listed size = L x WA = (L - 5) x (w - 5) = x x yB = (x + 148) x (y + 148) = m x n

F = (m - 60) x (n - 60)= (L + 83) x (W + 83)

= (L + 143) x (W + 143)

= Diffuser overall sizeF = False ceiling opening size See Table No.

*A special model for suiting in a ceiling module size of 600 x 600 mm

NOTE:Possible error in dimensions = 1%

Standard sizes:Any combination of L x W

150 150

225 225

300 300

375 375

450 450

525 525600 600

L Wmm mm

CDR

CDS

CDF

TECNALCO model CDR is used as a return air dif-fuser.

TECNALCO model CDS is accompanied by a keyoperated opposed blade damper, which is nor-mally used for supply air. The opposed bladedamper can be operated with a screw driver afterremoving internal core. Refer to Page No. 4-12for diagramatic representation.

TECNALCO model CDR is a fresh air inlet diffuser.

CDS

Excellent for Variable Air Volume Applications:The uniform, nearly horizontal jet from the outer core, maintains effective distribution even whenthe air volumes vary over a considerable range.

CDF

= Blade pitch = 38 mm

= Flange depth = 48 mm

= Damper depth = 36 mm

= Damper pitch = 25 mm

= Filter thickness= 12.5/25 mm

B p

F d

F t

Dd

Dp

150 x 150

225 x 225

300 x 300

375 x 375

450 x 450

525 x 525

600 x 600

457 x 457

233 x 233

308 x 308

383 x 383

458 x 458

533 x 533

608 x 608

683 x 683

540 x 540*

N FL x W mm mm

False ceiling opening sizes:

Frame thickness = 1.2mm


Standard sizes:Neck and overall dimensions of square-type models


Designed for installation in modular metal pan ceil-ings with snap-in T-bar suspension. Sized to fit the standard dimensions of the metal panel modules.

Recessed type:

It maintains same features as TECNALCO stan-dard type models, except in border flange.

Recessed type border enables diffuser face to bemounted flush with ceiling tile modules withoutover- lapping flange.

CDR-C

150 150

225 225

300 300

375 375

450 450

525 525600 600

L Wmm mm

N A BL x W mm mm mmx x y m x n

150 x 150 150 x 150

225 x 225

300 x 300

375 x 375

450 x 450

525 x 525600 x 600

520 x 520

230 x 230

305 x 305

380 x 380

455 x 455

530 x 530

605 x 605680 x 680

600 x 600

225 x 225

300 x 300

375 x 375450 x 450

525 x 525600 x 600

520 x 520

*A special model sized to fit in a ceiling module size of 600 x 600 mm

NOTE:Please add 5mm to ‘N’ for duct opening size.

A = Diffuser Neck size

A = Diffuser neck size = x x y

h = Diffuser height =

N = Nominal size = L x W

N = Nominal size = L x W

D = Duct size = (L + 5) x (W + 5)

Frame depth = 35 mm

(L + 80) x (W + 80)B = Diffuser overall size =

B = Diffuser overall size = m x n

F = False opening size = (m - 14)

Fd

Fd


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SUPPLY, EXTRACT CEILING DIFFUSERS WITH LEVER

CDS

TECNALCO model CDS is accompanied by a keyoperated opposed blade damper, which is nor-mally used for supply air. The opposed bladedamper can be operated with a screw driver afterremoving internal core. Refer to Page No. 4-12for diagramatic representation.

CDS

Excellent for Variable Air Volume Applications:The uniform, nearly horizontal jet from the outer core, maintains effective distribution even whenthe air volumes vary over a considerable range.

= Blade pitch = 38 mm

= Flange depth = 48 mm

= Damper depth = 36 mm

= Damper pitch = 25 mm

= Filter thickness= 12.5/25 mm

B p

F d

F t

Dd

Dp

150 x 150

225 x 225

300 x 300

375 x 375

450 x 450

525 x 525

600 x 600

457 x 457

233 x 233

308 x 308

383 x 383

458 x 458

533 x 533

608 x 608

683 x 683

540 x 540*

N FL x W mm mm



CDR-C

CDS-C

CDR-C-BD

TECNALCO model CDR-C is a return air diffuserwith a recessed frame.

TECNALCO model CDS-C is accompanied by akey operated opposed blade damper. The dampercan be operated with a screw driver afterremoving the internal core, which is used as a supplyair terminal.

TECNALCO model CDR-C-BD is like CDS-C butwith a butterfly damper, used as a supply airterminal.


150 x 150

225 x 225

300 x 300

375 x 375

450 x 450

525 x 525

600 x 600

520 x 520

216 x 216

291 x 291

366 x 366

441 x 441

516 x 516

591 x 591

666 x 666

586 x 586*

N Fmm mm

Extended panel with snap in flanges:

NOTE:For Engineering and Performance Data refer to Page No. 4-14 to 4-31For Fastening details refer to Page No. 4-32

If the ceiling module is more than 75 mm larger than the listed duct size (or) nominal size in either or both dimensions, a module sized extended panel will be added to the diffuser. The extended panel will be of steel (or) aluminium construction, complete with the snap-in flanges, in powder coated colour finish, matching with the Diffuser.

CEILING DIFFUSERS COMBINATION MODELS OF SUPPLY AND RETURN AIR

CDRS-DD

TECNALCO model CDRS-DD type diffuser is a combination of supply and return ceiling diffusers which is sized to match rooftop air conditioners in the most popular capacities.


150 150

225 225300 300

375 375

450 450525 525600 600

675 675

750 750825 825900 900

L W

Standard sizes:Neck and overall dimensions of Type CDRS - Square models

L x W mm mm mmx x y m x n

150 x 150 145 x 145

220 x 220

295 x 295370 x 370

445 x 445

520 x 520

595 x 595670 x 670

745 x 745

820 x 820

895 x 895

293 x 293

368 x 368

443 x 443

518 x 518

593 x 593668 x 668

743 x 743818 x 818

893 x 893

968 x 968

1043 x 1043

225 x 225

300 x 300375 x 375

450 x 450

525 x 525

600 x 600675 x 575

750 x 750

825 x 825900 x 900

A = Diffuser Neck sizeN = Nominal size = Duct size ‘D’

F = False ceiling opening size

B = Diffuser overall size n = Neck size for the return airegg crate core

CDRS-D

The Return Core Is Decorative Design Pattern Type.

The core is of easily removable type and interchangeable also.

The supply portion of diffuser is accompanied bya key operated opposed blade damper.


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A diffuser with ‘EQUALISINGGRID’ Equalises flow of air into neck of diffuser or duct. Also gives directional control of air flow with minimum noise and turbulance. Equalising grid louvres are individally adjustable, secured in nylon bushes to hold their settings and provide rattle-free perfomance. Extruded aluminium vanes and mill finish frame. Avaliable in black matt finish also

Equalising grid helps for distributing the cool air even more horizontally over the ceiling surface

The vanes of equalising grid can be adjusted to different degrees either in one direction or in both directions away from each other.

B = Vertical bar pitch = 19 mmpv

h = Height of the equalising grid= 40 mm


150 150

225 225

300 300

375 375

450 450

525 525600 600

L W

Other than the listed sizes arealso available on request.

CEILING DIFFUSERS COMBINATION MODELS OF SUPPLY AND RETURN AIR

The return air core is egg-cratetype with dimensions of 12.5 x12.5 x 0.5 mm aluminium corewith a 90% free area.

The core is of easily removabletype and interchangeable also.

The supply portion of diffuseris accompanied by a key oper-ated opposed blade damper.

False ceiling opening sizes:Return air neck size:

150 x 150

225 x 225

300 x 300

375 x 375450 x 450

525 x 525

600 x 600

457 x 457

233 x 233

308 x 308383 x 383

458 x 458533 x 533

608 x 608683 x 683

540 x 540*

N F

NOTE:

* A special model for suiting in a ceiling module size of 600 x 600 mm

‘n’ - the neck size for the return air - egg cratecore size can be varied as per the customer’srequirement.

150 x 150 75 x 75

225 x 225 150 x 150

300 x 300 150 x 150

375 x 375 150 x 150450 x 450 225 x 225

525 x 525 225 x 225

600 x 600 300 x 300

457 x 457 225 x 225*

N mm mmn

CDR-EC


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Opposed blade damper - OD:

Aluminium filter - AF:

Efficiency of filter:

Particles Size Efficiency %

75 - 150150 - 700 90

60

A Round Damper (or) Butterfly Damper - BD:

Equalising grid - EG:

An opposed blade damper is specially designed for use with all models of TECNALCO square and rectangular type ceiling diffusers. Blade arrangement ensures uniform distribution through diffuser throat. Provides positive control of air volume from full open to full closed position, regardless of system pressure.

Attaches quickly with sheet metal screws directly to neck of the diffuser. Operating lever is accessible at diffuser face or screw operating is accessible at the face of the opposed blade damper, which can be operated by a key or a screw driver.The material is of extruded aluminium mill finish. Black matt in colour is also available on request.

A filter media is specially designed for u e electronic, computer, and pharmace utical industry. The thickness of the filter varies from 50 mm to 100 mm as per requirement.

Adapts square neck CDS diffusers to a round neck, permitting attachment of round flexible or rigid duct. Damper selection is then restricted to dampers for round neck only. Adaptors fit over the diffuser neck for fast assembly

Equalises flow of air into neck of diffuser or duct. Also gives directional control of air flow with minimum noise and turbulance. Louvres are individually adjustable, secured in nylon bushes to hold their settings and provide rattlefree performance. Extruded aluminium vanes and mill finish frame. Available in black matt finish also


Duct fixing and Core

Removal:

Procedure is reversed for removal of core.

Operation of OpposedBlade Damper:

GENERAL NOTES:

The directional segments of each core style are noted as shown to identify with the tabulated performance data.

Dimensions noted on each core style are the “increments” in mm of the available duct sizes (L x W).

For nonstandard core style, or a standard core style with modified air volume requirements, see the detailed selection procedure and by simple inter and extra polation of the given data, required data will be obtained.

An opposed blade damper is specially designed for use with TECNALCO ceiling diffusers of all models. Blade arrangement ensures unform distribution through diffuser throat. Provides positive control air volume from full open to full closed position, regardless of system pressure. The full open to full closed position of damper to any degree can be operated by a screw driver after removing the internal core, which is shown in the figure.

Insertion of diffuser core is effected by depressing core pin springs in holes located at end of border frame and releasing core when pins are aligned with corresponding holes at opposite end offrame.


11 12



Standard directional core patterns of Ceiling Diffusers

R ‘2’ Way ‘W’ R ‘3’ Way R ‘4’ Way

S ‘1’ Way S ‘2’ Way

S ‘C’ Way S ‘3’ Way S ‘4’ Way

R ‘1’ Way ‘W’ R ‘2’ Way ‘L’R ‘1’ Way ‘L’

TECNALCO models of Square and Rectangular diffusing cores are interchangeable between standard outer frames of the same size

ENGINEERING AND PERFORMANCE DATA

Throw data are based on terminal velocities (Vt) atthe ceiling for supply air temperatures of 11oCbelow room temperatures. To determine throw forisothermal and t 11oC temperature differential,use factors in following table.

Maximum throw show is based on a Vt of 0.25m/s, and minimum throw on a Vt of 0.75 m/s. Withdiffusers mounted on a 2.7 m high ceiling and sup-plying air at 11o C below room temperature, theapproximate average room velocities will be 0.175m/s and 0.33 m/s respectively.

Vt m/s Isothermal air flow toC = 11oC air flow0.75 1.00 1.000.50 1.05 1.100.25 1.11 1.22

Notes on Selection

Air diffusion without side wall effect with model CDS-4 Wayv t 0

t x

t x

Drop

Vx (m/s)

Vx (m/s)

T = ThrowT = Throw

Spread Spread22 o

22o

oC*tR

When two diffusers are discharging air towards each other, selection should be based on the diffuser size which will produce the required throw (one half the distance between diffuser centres) within the medium to maximum throw range at the air volume requirements.

When diffusers are mounted on an exposed duct, or used with drop collars, the throw is decreased by approximately 40%. Air will be discharged downwards at an angle of approximately 20o from the horizontal. Horizontal air thrown can be obtained by extending a surface minimum of 300 mm beyond the periphery of the diffuser.

For heating application, maximum mounting height is 3.7 metres at 16.5o C temperature differential with returns mounted at or near floor level.

NC data are measured at a location from the diffuser of 1.5 metres and 45o angle from the face with an allowance of 10 dB for room effect and for diffusers without dampers or with dampers fully open. A blank space indicates no significant sound.

Note: Sound Power level ratings are available for the full range of diffusers upon request and are based on recommendations as per ADC Standard 1062 - GRD 84

Dampers fitted to diffusers are intended for fine balancing purposes. Excessive dampering to overcome high duct pressures will result in an increased sound level of approximately 8dB per doubling of pressure drop


13 14



Air Distribution

For ceiling diffusers, in addition to air flow, air throw and induction characteristics are the principle actors for selection.

Calculate the total air flow for the specific area.locate diffusers uniformly and co-ordinate with lighting fixtures.If diffusers cannot be located in the center of the area, select random diffusers with 1, 2 or 3 way pattern.Suggest diffuser locations considering ceiling height.Find maximum air flow rate per side of diffuser.Control the total air flow rate permissible per diffuser.Select the number of supply and return diffusers.Control sound level for the type of application.Select the size of diffusers from the air flow data and recontrol the horizontal throw of the selected diffusers.

The induction factor and the throw can be adjusted by the individual internal setting blades for slotdiffusers but they are mostly fixed for ceiling diffusers.

For such reason, the selection of ceiling diffuser must be made with precision, taking into consideration,the following procedure:

At important neck velocity, the ceiling diffusers can have high induction factors which are included in the throw values in the information given on following pages.The importance of air induction can be observed from pictures taken with contrast smoke.

Air Induction

Air induction

Air

flow

m3 /h

.

150500

1,000225

1,500

2,000

2,400375

450

0.5 1.0 1.5 2.0 2.5

300

Induced air ratio to m3 supply air.

Tests have been made on CD-4 listed sizes 150 mm, 300 mm and 600 mm with different neck velocities.The resulting air induction factor becomes important with increasing neck velocity and the induced air capacity can be more important in volume than the initial air supply.

Air induction is an important factor in air conditioning distributing systems.The energy produced by the volume flow through diffuser and the discharge velocity at the diffusers outlet induces the air in the room and is the principle reason for the drop in temperature between supply air and room air.At high neck velocity, the induced air capacity can become more important than the original air flow, and throw is increasing in function of induced air ratio.Testing results for throw includes the influence of air induction.


Ceiling effect

How to Specify

1. Sizes are designated by neck dimensions (L xW).2. Available core patterns are illustrated on page 4-133. Standard sizes are available in increments of 75 mm, dependiing on the dimensions involved and the core pattern selected.4. The module size is required when extended panel models are specified.

Performance Notes

All pressures are in mm of water.TP = total pressure.- SP = negative static pressure.Throw data is listed in Metres to terminal velocities (Vt) as listed below.Minimum throw to Vt = 0.75 met/sec.Middle throw to Vt = 0.5 met/sec.maximum throw to Vt = 0.25 met/sec.

Sound data:NC values are based on a room absorption of 10 db, re 10-12 watts. Tested per ADC EquipmentCode 1062 : GRD-84Performance data as tabulated is for supply air applications.Performance data assumes that CDS is mounted on the ceiling for maximum ceiling effect.When no ceiling effect is present, the horizontal throw will be reduced approximately by 25%, producing a downward projection angle as illustrated in the above Figure.

Ceiling

300 mm150

75750 mm

750 mm

16o

30o

Model CD directional diffusers are not recommended for applications without ceilings, such as exposed duct mounting. Performance data as published in this catalogue is based on the CD diffuser being mounted at the ceiling. The published performance for the directional air pattern benefits from the ceiling coanda effect. When the CD diffuser is mounted remote from the ceiling, the air patterns to be anticipated are illustrated in Figure.

With model CDS-4 Way 225 x 225 mm size

Diffusing of air pattern without ceiling effect

t0 = 11o C differential

High Efficiency Units

TECNALCO Model CDF

2.

1.

Designed specifically to filter critical air supplies in operating theatres, sterile and contaminated suites, also in viral and toxic research areas. B.S. 3928 class 99.9995% efficiency with Hepa filters.

A filter media for use in submicroscopic clean areas especially in the electronic, nuclear and pharmaceutical industries.


15 16



NOTE :

Tests have been conducted with constant volume of air (smoke)

Smoke tests conducted by ETL Testing Laboratories Inc. An ADC certified lab.

Model: CDS-4 150 x 150 mmDischarging of air pattern with ceiling effect




Discharging of air pattern can be observed from the smoke test results.


Test Results from ETL

Test method :

Air volume qv :

Neck velocity Vk :

Throw T :

NC values :

Outlet size :

Air volumes are given in Lt/sec.

The throw values given in the tables are related to the ceiling diffuser placed nearer tothe ceiling.Three throw values are given for each qv to the corresponding terminal velocities Vt.

VtVtVt

Minimum Throw 0.75 m/sec.Middle Throw 0.50 m/sec.Maximum Throw 0.25 m/sec.

The effective neck velocities given are related to the corresponding neck areas of the diffuser.

Outlet sizes are mentioned on the left side of each row within a tolerance of 10%

The tests were conducted, by the ETL Testing Laboratories, on the selected sizes of the supply ceiling diffusers. The diffusers had adjustable opposed blade dampers attached to their inlets. The dampers were set to full open position. The test results include Total pressure, Area factor, Throw pattern and Sound power level.

The diffusers were tested in accordance with Air Diffusion Council Test Code for Grilles, Registers and Diffusers ADC 1062: GRD-84. The diffusers were installed in the ADC facility and supplied with measured volumes of air. The static pressure was measured 1-1/2 duct diameters upstream of the diffuser inlet.

If the ceiling diffuser is mounted on an exposed duct, these throw values should beidecreased by a factor 0.6 0.75 .

Noise data is given in terms of NC levels. These have been derived from sound power level data (dB re 10-12 watts) by subtracting 10 dB (Room effect) from the sound power levels.

Area Factor AkFor air outlets and inlets

MANUFACTURER: TECNALCO OUTLET/INLET TYPE & SIZE: 150 mm square

PRODUCT: 4WAY CEILING DIFFUSER

FLOW METER EQUIPMENT: 305 mm metering station152 mm sharp edged orifice

NECK AREA: 225 cm2

ANEMOMETER: Alnor Velometer Type 6070PTYPE & SERIAL NUMBER: 6077AA

READINGS CALCULATIONS

RUNNO. Meter P

Flow

Pa

DISCHARGE VELOCITY IN m/sec.

1 2 3 4 AVE.

STATICPRESSURE

Pa

FLOW

L/s

NECKVEL.m/s

NECKV.P.Pa

TOTALPRESS.

Pa

AREA FACTOR( Ak )

1 9.71 6.48 6.60 6.86 6.60 6.63 22.90 47 2.03 2.49 25.39 0.0071

2 14.93 7.98 8.13 8.26 8.26 8.15 35.84 59 2.54 3.98 39.82 0.0072

3 21.41 9.86 10.16 10.26 10.26 10.13 51.27 71 3.05 5.72 56.99 0.0070

AVERAGE 0.0071


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Throw Test Data

Product: 4Way Ceiling Diffuser - 150 mm square

Run No. A Flow L/s 71 NC 30

Run No. B Flow L/s 47 NC 19

Distance from Outlet, Throw in Metres

cm

2.5

7.5

15

22

30

45

60

90

120

* *

0.6

0.3

0.3

Drop 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0

2.2 1.5 1.1 0.7 0.6 0.5 0.3 0.25

1.0 1.1 0.9 0.7 0.5 0.4 0.3 0.25

0.25 0.3 0.4 0.3 0.25 0.25 0.25

Velocity in m/s.

Distance from Outlet, Throw in Metres

cm

2.5

7.5

15

22

30

45

60

90

120

*

Drop 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0

Velocity in m/s.

2.5 1.5 1.1 0.7 0.5 0.4 0.3 0.25

0.4 0.6 0.8 0.6 0.5 0.3 0.3 0.25


Sound Test Data

Sound Power Level Data Sheet

Octava BandCenter Frequency

Hertz

150 x 150 mm Four Way

Discharge Sound Power Level LwdB re 10-12 Watt

1252505001000200040008000

Total Air Volume L/s

Inlet Total Pressure, Pa

**Noise Criteria

36.036.5*27.018.0(16.0)(19.5)(26.5)

36.537.035.0*28.024.0(19.5)(26.5)

38.541.040.0*35.032.524.0

(26.5)

43.045.044.540.039.0*31.527.0

46.048.048.545.545.5*39.531.0

35

14.44

12

47

25.39

19

59

39.82

24

71

57.00

30

85

82.14

36

NOTE:

Sound power level data marked in parenthesis has reached ambient levels in the test room. Actuallevels are less than or equal to the levels indicated.

*Octave Band Center Frequency, Sound Power Level that determined the Noise Criteria for each air volume.

**Noise Criteria ratings were determined by subtracting 10 db (room effect) from the Sound Power Levels.

Technical Data:

Ceiling height Max. Cooling t Maximum air flow for onedirection

m /s3 m /h3(m)

2.53.03.54.0

(oC)

11141617

0.100.220.350.50

36080012601800

Recommended maximum air flow per direction in relation to the height differential between the supply airand room air.


19 20



Ceiling Diffusers - Effective Free Area Ak = met2

Nom

inal

Size

L x

W (m

m)

Cor

e St

yle

S 1

S

2

S 2

C

S 3

S

4

R 1

W

R 2

W

R 1

L

R

2L

R

3

R

4

150

x 15

00.

0073

0.00

73

0.

0073

0.00

71

0

.007

0.01

55

0.

0155

0.01

55

0.

0152

0.01

5

0.02

97

0.

0297

0.02

97

0.

0293

0.0

29

0.04

28

0.

0428

0.04

28

0.

0425

0.0

42

0.06

19

0.

0619

0.06

19

0.

0619

0.0

61

0.08

82

0.

0882

0.08

82

0.

088

0.08

7

0.10

95

0.

1095

0.10

95

0

.109

0.

108

0.01

0.0

1

0

.009

5

0.0

095

0.

009

0.0

09

0.01

4

0.0

14

0

.013

0.0

13

0.

013

0.0

12

0.01

8

0.0

18

0

.017

0.0

17

0

.017

0.0

165

0.02

2

0.0

22

0

.021

0.0

21

0

.021

0.0

2

0.02

2

0.0

22

0

.019

0.0

19

0.

017

0.0

16

0.02

7

0.0

27

0

.023

0.0

23

0.

022

0.0

21

0.03

5

0.0

35

0

.031

0.0

31

0

.031

0.0

30

0.03

7

0.0

37

0

.035

0.0

35

0.

034

0.0

33

0.03

8

0.0

38

0

.037

0.0

37

0.

0365

0.0

36

0.04

6

0.0

46

0

.045

0.0

45

0.

0445

0.0

44

0.05

5

0.0

55

0

.052

0.0

52

0.

051

0.0

5

0.05

7

0.0

57

0

.056

0.0

56

0.

055

0.0

52

0.06

6

0.0

66

0

.065

0.0

65

0.

0645

0.0

64

0.08

3

0.0

83

0

.082

0.0

82

0.

081

0.0

8

0.09

5

0.0

95

0

.094

5

0.0

945

0.

093

0.0

93

225

x 15

0

300

x 15

0

375

x 15

0

450

x 15

0

225

x 22

5

300

x 22

5

375

x 22

5

450

x 22

5

525

x 22

5

300

x 30

0

375

x 30

0

450

x 30

0

525

x 30

0

375

x 37

5

450

x 37

5

525

x 37

5

450

x 45

0

525

x 45

0

600

x 45

0

525

x 52

5

600

x 60

0

231.

5-2.

0-3.

934

2.1-

3.1-

4.6

683.

6-5.

1-7.

579

4.1-

5.1-

7.9

563.

6-4.

3-6.

445

2.9-

3.8-

5.4

512.

9-3.

8-5.

876

3.4-

4.8-

6.1

101

4.3-

5.6-

7.0

127

4.9-

6-6.

915

25.

7-6.

5-8.

817

75.

7-6.

4-9.

3

903.

5-5-

6.4

135

5.2-

6.3-

7.9

180

6.1-

7.4-

9.5

225

6.5-

7.8-

10.8

270

6.9-

7.8-

11.6

315

7.3-

8.8-

12.6

141

4.3-

6-8.

121

16-

7.5-

9.6

281

7.2-

8-11

352

7.9-

9.1-

12.8

422

8.2-

9.8-

13.7

492

8.8-

10.2

-15.

2

203

5.1-

6.9-

9.1

304

7.1-

8.9-

11.8

405

8.2-

9.4-

13.1

506

8.8-

10.6

-14.

960

79.

7-11

.4-1

6.1

908

10.2

-12.

9-18

276

5.9-

8-12

.055

19.

6-11

.7-1

6.8

689

11-1

3.1-

17.9

827

11.9

-14-

19.5

965

13-1

5.5-

20.5

413

8.2-

10-1

4.5

360

7.3-

10.2

-13.

854

010

.2-1

1.9-

1672

011

.2-1

4.5-

1890

012

.8-1

5-20

.110

8013

.8-1

6.4-

21.5

1260

14.6

-11.

1-24

.0

Nec

k Si

zeVe

loci

tyPr

essu

re(P

a)

Neck

Vel

ocity

M/S

1.0

1.5

2.

0

2

.5

3.0

3.

5

0.5

1.3

2.

4

3

.7

5.4

7.4

(mm

)

L/S

Thro

w (m

)

L/S

Thro

w (m

)

L/S

Thro

w (m

)

L/S

Thro

w (m

)

L/S

Thro

w (m

)

L/S

Thro

w (m

)

L/S

Thro

w (m

)

150

x 15

0

225

x 22

5

300

x 30

0

375

x 37

5

450

x 45

0

600

x 60

0

525

x 52

5

NC

<

15

< 15

1

8

23

29

3

5

NC

<

15

< 15

1

8

24

29

3

4

NC

<

15

< 15

2

4

31

36

4

1

NC

<

15

23

31

3

7

4

3

47

NC

1

7

2

8

3

5

42

47

5

2

NC

1

9

3

4

3

7

44

49

5

4

NC

2

2

3

3

4

0

46

51

5

6

ENG

INEE

RIN

G A

ND

PERF

ORM

AN

CE

DATA

Sele

ctio

n Ta

bles

of C

eilin

g Di

ffuse

rs -

Squa

re C

ore

- 1

Way

Disc

harg

e


21 22



Selection Tables of Ceiling Diffusers - Square Core - 3 Way Discharge

Nec

k Si

zeN

eck

Velo

city

Velo

city

Pres

sure

(Pa)

M/S

1.0

1.5

2.0

2

.5

3.0

3.5

0.5

1.3

2.4

3.

7

5.

4

7.4

(mm

)

150

x 15

0

225

x 22

5

300

x 30

0

375

x 37

5

450

x 45

0

525

x 52

5

600

x 60

0

L/S

Thro

w (m

) Tx

Thro

w (m

) Ty

L/S

Thro

w (m

) Tx

Thro

w (m

) Ty

L/S

Thro

w (m

) Tx

Thro

w (m

) Ty

L/S

Thro

w (m

) Tx

Thro

w (m

) Ty

L/S

Thro

w (m

) Tx

Thro

w (m

) Ty

L/S

Thro

w (m

) Tx

Thro

w (m

) Ty

L/S

Thro

w (m

) Tx

Thro

w (m

) Ty

NC

<

15

< 15

18

23

29

35

NC

<

15

< 15

18

24

29

34

NC

1

5

1

5

24

31

3

6

41

NC

1

5

2

3

34

37

4

3

47

NC

1

7

2

8

35

42

4

7

52

NC

1

9

3

1

37

44

4

9

54

NC

2

2

3

3

40

46

5

1

56

341.

9-2.

1-3.

02.

0-2.

6-3.

4

451.

8-2.

4-4.

02.

1-3.

0-4.

2

562.

1-3.

0-4.

32.

4-3.

6-4.

8

682.

4-3.

0-4.

62.

9-3.

8-5.

0

792.

7-3.

7-4.

93.

1-3.

8-5.

1

321.

0-1.

5-2.

51.

2-1.

6-3.

0

512.

4-3.

0-4.

32.

7-3.

0-4.

8

902.

7-4.

0-5.

82.

7-4.

3-6.

2

141

3.6-

5.4-

7.0

3.6-

5.4-

7.6

203

4.3-

5.8-

8.2

4.6-

6.4-

8.5

276

4.6-

6.7-

9.8

4.9-

7.4-

10.4

413

6.7-

8.5-

11.9

7.4-

8.9-

12.5

551

7.9-

9.8-

14.0

8.8-

10.7

-14.

6

689

9.1-

11.0

-15.

59.

5-11

.7-1

6.1

827

9.8-

11.9

-17.

110

.4-1

2.4-

18.0

965

10.7

-13.

1-18

.311

.3-1

3.8-

19.2

360

5.5-

7.9-

11.3

5.8-

8.5-

11.9

540

7.9-

9.8-

13.7

8.6-

10.2

-14.

4

720

9.1-

11.3

-15.

89.

4-11

.9-1

6.4

900

10.4

-12.

8-18

.010

.7-1

3.3-

18.9

1080

11.3

-13.

7-18

.811

.9-1

4.3-

19.7

1260

12.2

-14.

6-21

.012

.8-1

5.2-

21.9

304

5.8-

7.3-

10.4

6.4-

7.9-

11.2

405

7.0-

8.5-

11.9

7.8-

8.9-

12.6

506

7.6-

9.4-

13.4

8.4-

11.0

-15.

2

607

8.2-

10.4

-14.

68.

6-11

.0-1

5.2

908

8.8-

11.0

-15.

89.

4-11

.8-1

6.7

211

4.9-

6.1-

8.5

5.6-

6.9-

9.3

281

5.6-

7.0-

9.8

6.5-

7.8-

10.7

352

6.4-

7.9-

11.3

7.3-

8.6-

11.9

422

7.0-

8.5-

12.2

7.8-

9.2-

12.9

492

7.6-

9.1-

13.7

8.1-

9.7-

14.0

135

4.3-

5.1-

7.0

4.6-

5.1-

7.3

180

4.9-

6.1-

8.2

5.5-

6.7-

8.8

225

5.2-

6.4-

9.4

5.9-

7.1-

10.0

270

5.8-

7.0-

10.0

6.4-

7.4-

11.0

315

6.1-

7.6-

11.0

6.8-

8.0-

11.8

762.

9-3.

7-5.

22.

9-4.

3-6.

0

101

3.4-

4.3-

6.0

3.7-

4.9-

6.3

127

3.8-

4.5-

6.7

4.1-

5.2-

7.3

152

4.4-

5.2-

7.6

5.0-

5.8-

8.2

177

4.6-

5.5-

8.0

5.0-

5.8-

8.6


23 24

TECNALCOCEILING DIFFUSERSEN

GIN

EERI

NG

AN

D PE

RFO

RMA

NC

E DA

TA

Sele

ctio

n Ta

bles

of C

eilin

g Di

ffuse

rs -

Squa

re C

ore

- 2

Way

Disc

harg

e

Nec

k Si

zeVe

loci

tyPr

essu

re(P

a)

Neck

Vel

ocity

M/S

1.0

1.5

2.

0

2

.5

3.0

3.

5

0.5

1.3

2.

4

3

.7

5.4

7.4

(mm

)

L/S

Thro

w (m

)

L/S

Thro

w (m

)

L/S

Thro

w (m

)

L/S

Thro

w (m

)

L/S

Thro

w (m

)

L/S

Thro

w (m

)

L/S

Thro

w (m

)

150

x 15

0

225

x 22

5

300

x 30

0

375

x 37

5

450

x 45

0

600

x 60

0

525

x 52

5

NC

<

15

< 15

1

8

23

29

3

5

NC

<

15

< 15

1

8

24

29

3

4

NC

1

5

1

5

2

4

31

36

4

1

NC

1

5

2

3

3

1

37

43

4

7

NC

1

7

2

8

3

5

42

47

5

2

NC

1

9

3

1

3

7

44

49

5

4

NC

2

2

3

3

4

0

46

51

5

6

231.

2-1.

6-3.

1

512.

7-3.

3-5.

2

903.

2-4.

6-6.

0

141

4.0-

5.6-

7.8

203

4.8-

6.6-

8.6

276

5.2-

7.4-

10.6

360

6.1-

8.6-

12.1

540

8.8-

10.4

-14.

672

010

.0-1

1.9-

16.6

900

11.0

-13.

7-18

.910

8011

.9-1

4.6-

19.7

1260

12.9

-15.

5-22

.6

413

7.6-

9.1-

13.0

551

8.8-

10.6

-15.

068

910

.0-1

1.9-

16.6

827

10.6

-12.

8-18

.196

511

.6-1

4.0-

19.4

304

6.8-

8.2-

11.3

405

7.9-

9.1-

12.8

506

8.5-

10.2

-14.

560

79.

1-10

.9-1

5.7

908

9.7-

12.2

-16.

9

211

5.8-

7.2-

9.2

281

6.9-

7.8-

10.7

352

7.6-

8.8-

12.4

422

7.9-

9.4-

13.4

492

8.5-

9.9-

14.8

135

4.9-

5.9-

7.6

180

5.8-

7.0-

9.1

225

6.2-

7.3-

10.3

270

6.7-

7.6-

11.2

315

7.0-

8.5-

12.2

763.

2-4.

5-5.

810

14.

0-5.

2-6.

612

74.

6-5.

7-6-

515

25.

4-6.

4-8.

417

75.

5-6.

0-9.

0

342.

0-2.

8-3.

645

2.3-

3.2-

4.5

562.

8-3.

9-5.

068

3.2-

4.1-

5.2

793.

5-4.

1-5.

8

Nec

k Si

zeVe

loci

tyPr

essu

re(P

a)

Neck

Vel

ocity

M/S

1.0

1.5

2

2.

5

3

.0

3.5

0.5

1.3

2.4

3.

7

5

.4

7.4

(mm

)

L/S

Thro

w (m

)

L/S

Thro

w (m

)

L/S

Thro

w (m

)

L/S

Thro

w (m

)

L/S

Thro

w (m

)

L/S

Thro

w (m

)

L/S

Thro

w (m

)

225

x 15

0

300

x 15

0

450

x 15

0

300

x 22

5

450

x 22

5

525

x 30

0

450

x 30

0

NC

15

15

19

22

27

32

NC

15

15

23

28

29

33

NC

17

19

27

34

39

44

NC

18

20

28

35

40

44

NC

20

23

32

37

42

48

NC

24

26

33

39

45

50

NC

25

27

35

42

46

52

321.

4-2.

1-5

432.

2-3-

5.9

652.

5-3.

8-6

652.

5-3.

8-6

101

3-3.

9-6.

5

128

3.5-

4.4-

7.2

152

3.9-

5.2-

7.3

472.

1-4-

5.5

642.

9-4.

8-6.

4

983.

3-5.

1-7

983.

3-5.

1-7

152

3.9-

5.2-

7.5

198

4.4-

5.8-

9

231

4.7-

6-9.

2

664-

5.1-

6.2

904.

1-5.

5-7

130

4.5-

5.8-

8

130

4.5-

5.8-

8

180

4.8-

6.3-

8.5

264

5-6.

9-9.

2

312

5.4-

7.1-

9.9

854.

1-4.

9-7

112

4.4-

5.4-

8

164

5-6.

5-8.

6

164

5-6.

5-8.

5

252

5.5-

6.9-

9.4

334

6.6-

7.3-

10.2

396

6.9-

7.4-

10.8

945-

5.8-

7.6

132

4.8-

5.5-

8.3

198

5.5-

6.8-

8.9

198

5.5-

6.8-

8.9

302

5.8-

6.9-

10

404

6.9-

7.9-

11

484

7.2-

8.1-

11.6

112

5.2-

6.1-

8.2

152

5.1-

6.5-

9

231

5.9-

7.1-

9.3

231

5.9-

7.1-

9.3

360

6.3-

7.9-

11

472

6.9-

8.3-

12

571

7.5-

8.7-

13

ENG

INEE

RIN

G A

ND

PERF

ORM

AN

CE

DATA

Sele

ctio

n Ta

bles

of C

eilin

g Di

ffuse

rs -

Rect

angu

lar C

ore

- 1 W

ay D

ischa

rge


Selection Tables of Ceiling Diffusers - Square Core - 4 Way Discharge

NC

< 1

5

< 1

5

1

8

23

29

35

NC

< 1

5

< 1

5

1

8

24

29

34

NC

< 1

5

< 1

5

2

4

31

36

41

NC

< 1

5

2

3

3

1

37

43

47

NC

< 1

5

2

8

3

5

42

47

52

NC

1

9

3

1

3

7

44

49

54

NC

2

2

3

3

4

0

46

51

56

Nec

k Si

zeVe

loci

tyPr

essu

re(P

a)

Neck

Vel

ocity

M/S

1.0

1.5

2.

0

2

.5

3.0

3.

5

0.5

1.3

2.4

3

.7

5.4

7.

4(m

m)

L/S

Thro

w (m

)Pt

(Pa)

L/S

Thro

w (m

)Pt

(Pa)

L/S

Thro

w (m

)Pt

(Pa)

L/S

Thro

w (m

)Pt

(Pa)

L/S

Thro

w (m

)Pt

(Pa)

L/S

Thro

w (m

)Pt

(Pa)

L/S

Thro

w (m

)Pt

(Pa)

150

x 15

0

225

x 22

5

300

x 30

0

375

x 37

5

450

x 45

0

525

x 52

5

600

x 60

0

231.

0-1.

5-2.

56

341.

9-2.

1-3.

013

451.

8-2.

4-4.

023 10

13.

4-4.

3-6.

023 18

04.

9-6.

1-8.

223 28

15.

6-7.

0-9.

823 40

57.

0-8.

5-11

.924

506

7.6-

9.4-

13.4

37

551

7.9-

9.8-

14.0

24 720

9.1-

11.3

-15.

825

900

10.4

-12.

8-18

.039

1080

11.3

-13.

7-18

.856

1260

12.2

-14.

6-21

.076

689

9.1-

11.0

-15.

538

827

9.8-

11.9

-17.

155

965

10.7

-13.

1-18

.375

607

8.2-

10.4

-14.

654

908

8.8-

11.0

-15.

874

352

6.4-

7.9-

11.3

37

422

7.0-

8.5-

12.2

54

492

7.6-

13.7

73

225

5.2-

6.4-

9.4

36

270

5.8-

7.0-

10.0

53

315

6.1-

7.6-

11.0

127

3.8-

4.5-

6.7

36

152

4.4-

5.2-

7.6

53

177

4.6-

5.5-

8.0

72

562.

1-3.

0-4.

336

682.

4-3.

4-4.

653

792.

7-3.

7-4.

972

762.

9-3.

7-5.

213 13

54.

3-5.

0-7.

013 21

14.

9-6.

1-8.

513 30

45.

8-7.

3-10

.413 41

36.

7-8.

5-11

.914 54

07.

9-9.

8-13

.714

512.

4-3.

0-4.

36 90

2.7-

4.0-

5.8

6 141

3.5-

4.9-

7.0

6 203

4.3-

5.8-

8.2

6 276

4.6-

6.7-

9.8

6 360

5.5-

7.9-

11.3

6


25 26


Nec

k Si

ze

Nec

k Ve

loci

ty

Velo

city

Pres

sure

(Pa)

M/S

1.0

1.5

2.0

2

.5

3.0

3

.5

0.5

1.3

2.4

3

.7

5.4

7.4

(mm

)

L/S

Thro

w (m

)

L/S

Thro

w (m

)

L/S

Thro

w (m

)

L/S

Thro

w (m

)

L/S

Thro

w (m

)

L/S

Thro

w (m

)

L/S

Thro

w (m

)

L/S

Thro

w (m

)

L/S

Thro

w (m

)

225

x 15

0

300

x 15

0

450

x 15

0

375

x 15

0

300

x 22

5

450

x 22

5

375

x 30

0

375

x 52

5

525

x 22

5

NC

15

15

19

2

2

2

7

32

NC

15

15

23

28

29

3

3

NC

< 1

5

< 1

5

2

4

33

38

42

NC

17

19

27

34

3

9

44

NC

18

20

28

35

4

0

44

NC

19

22

30

38

4

1

46

NC

20

23

32

37

4

2

48

NC

22

26

31

40

4

2

49

NC

23

24

31

39

4

2

48

321.

1-1.

8-4.

647

1.8-

3.7-

4.9

663.

4-4.

5-5.

985

3.6-

4.3-

6.8

944.

4-4.

9-7.

211

24.

5-5.

8-7.

9

431.

8-2.

4-5.

464

2.4-

4.3-

5.8

903.

9-4.

9-6.

711

24.

1-4.

9-7.

613

24.

6-5.

2-7.

915

24.

9-6.

1-8.

4

572.

0-2.

9-5.

484

2.9-

4.8-

6.1

112

4.0-

5.2-

7.0

141

4.1-

5.1-

8.0

168

5.1-

5.9-

8.1

198

4.9-

6.6-

8

652.

2-3.

1-5.

798

3.0-

4.9-

6.6

130

4.2-

5.2-

7.7

164

4.8-

6.0-

8.2

198

5.2-

6.1-

8.4

231

5.4-

6.8-

9

652.

2-3.

1-5.

7

832.

4-3.

3-6.

0

101

2.8-

3.6-

6.1

110

2.7-

3.7-

6.4

104

2.8-

3.7-

6.4

152

3.5-

4.9-

7.0

176

3.8-

5.2-

7.4

164

3.8-

5.2-

7.7

180

4.4-

6.0-

8.1

234

4.7-

6.4-

8.4

221

4.7-

6.4-

8.4

252

5.2-

6.4-

9.0

302

5.6-

6.6-

9.6

231

5.9-

6.3-

9.6

302

5.3-

6.5-

9.5

362

5.6-

6.9-

9.9

345

5.6-

6.9-

9.9

360

6.0-

7.4-

10.5

430

6.0-

7.8-

11

404

6.0-

7.5-

10.8

983.

0-4.

9-6.

613

04.

2-5.

2-7.

716

44.

6-6.

0-8.

219

85.

2-6.

0-8.

223

15.

4-8.

8-9

124

3.2-

4.9-

6.7

165

4.4-

6.0-

7.8

208

4.9-

6.0-

8.4

248

5.3-

6.2-

9.3

296

5.7-

7.0-

9.8


Selection Tables of Ceiling Diffusers - Rectangular Core - 2 Way Discharge


SelSelection Tables of Ceiling Diffusers - Rectangular Core - 3 Way Discharge

Nec

k Si

zeN

eck

Velo

city

Velo

city

Pres

sure

(Pa)

M/S

1.0

1

.5

2

.0

2.5

3

.0

3

.5

0.5

1

.3

2

.4

3.7

5.

4

7

.4(m

m)

L/S

Thro

w (m

) Tx

225

x 15

0

300

x 15

0

450

x 15

0

300

x 22

5

450

x 22

5

450

x 30

0

525

x 30

0

Thro

w (m

) Ty

L/S

Thro

w (m

) Tx

Thro

w (m

) Ty

L/S

Thro

w (m

) Tx

Thro

w (m

) Ty

L/S

Thro

w (m

) Tx

Thro

w (m

) Ty

L/S

Thro

w (m

) Tx

Thro

w (m

) Ty

L/S

Thro

w (m

) Tx

Thro

w (m

) Ty

L/S

Thro

w (m

) Tx

Thro

w (m

) Ty

NC

15

1

5

19

22

27

32

NC

15

1

5

23

28

29

33

NC

17

1

9

27

34

39

44

NC

18

2

0

28

35

40

4

4

NC

25

2

7

35

42

46

52

NC

24

2

6

33

39

45

50

NC

20

2

3

32

37

4

2

4

8

471.

9-2.

1-3.

01.

9-3.

6-4.

4

321.

0-1.

5-2.

51.

0-1.

6-3.

5

431-

1.5-

2.5

1.4-

2.1-

5

651-

1.5-

2.5

2-2.

9-4.

9

652.

4-3-

4.3

2.4-

3.4-

5.4

101

2.4-

3-4.

32.

7-3.

4-5.

5

128

2.7-

4-5.

83-

4-6.

5

152

2.7-

4-5.

83-

4.5-

6.5

231

4.3-

5-7

4.4-

5.4-

8.1

312

4.9-

6.1-

8.2

5-6.

7-9

396

5.2-

6.4-

9.4

6-6.

8-10

484

5.8-

7-10

6.1-

7.2-

11

571

6.1-

7.6-

116.

5-8-

12

198

4.3-

5-7

4.2-

5.1-

8

264

4.9-

6.1-

8.2

4.8-

6.4-

8.5

334

5.2-

6.4-

9.4

5.8-

6.7-

9.7

404

5.8-

7.0-

105.

9-7.

1-10

.5

472

6.1-

7.6-

116.

4-7.

9-11

.4

152

2.9-

3.7-

5.2

3.3-

4.8-

6.8

982.

9-3.

7-5.

23.

1-4.

5-6

130

3.4-

4.3-

63.

6-4.

9-7

164

3.8-

4.5-

6.7

4.4-

5.8-

7

198

4.4-

5.2-

7.6

4.6-

5.7-

8

231

4.6-

5.5-

85.

1-8.

2-8.

9

180

3.4-

4.3-

64.

1-5.

7-7.

7

252

3.8-

4.5-

6.7

4.5-

6-8

302

4.4-

5.2-

7.6

5-6.

1-8.

9

360

4.6-

5.5-

85.

5-6.

9-10

641.

9-2.

1-3

2-3.

9-5.

4

981.

9-2.

1-3

3.7-

4.6-

6

130

1.8-

2.4-

43.

6-4.

8-6.

8

164

2.1-

3-4.

33.

9-5.

9-7.

5

198

2.4-

3.4-

4.6

4.8-

6-8.

1

231

2.7-

3.7-

4.9

5.1-

6.5-

8.8

901.

8-2.

4-4

3.3-

4.3-

6.4

112

2.1-

3-4.

33.

6-4.

5-7.

2

132

2.4-

3.4-

4.6

4.2-

5-7.

5

152

2.7-

3.7-

4.9

4.4-

5.8-

8.2

661.

8-2.

4-4

3.1-

4.1-

5.5

852.

1-3-

4.3

3.3-

4.2-

6.6

942.

4-3.

4-4.

64.

1-4.

6-7

112

2.7-

3.7-

4.9

4.3-

5.4-

7.5


27 28



Selection Tables of Ceiling Diffusers - Rectangular Core - 4 Way Discharge

Nec

k Si

zeN

eck

Velo

city

Velo

city

Pres

sure

(Pa)

M/S

1.0

1

.5

2

.0

2.5

3

.0

3

.5

0.5

1

.3

2

.4

3.7

5.

4

7

.4(m

m)

L/S

Thro

w (m

) Tx

225

x 15

0

300

x 15

0

450

x 15

0

300

x 22

5

450

x 22

5

450

x 30

0

525

x 30

0

Thro

w (m

) Ty

L/S

Thro

w (m

) Tx

Thro

w (m

) Ty

L/S

Thro

w (m

) Tx

Thro

w (m

) Ty

L/S

Thro

w (m

) Tx

Thro

w (m

) Ty

L/S

Thro

w (m

) Tx

Thro

w (m

) Ty

L/S

Thro

w (m

) Tx

Thro

w (m

) Ty

L/S

Thro

w (m

) Tx

Thro

w (m

) Ty

NC

15

1

5

19

22

27

32

NC

15

1

5

23

28

29

33

NC

17

1

9

27

34

39

44

NC

18

2

0

28

35

40

4

4

NC

25

2

7

35

42

46

52

NC

24

2

6

33

39

45

50

NC

20

2

3

32

37

4

2

4

8

471.

9-2.

1-3.

01.

3-3.

4-3.

9

321.

0-1.

5-2.

50.

9-1.

4-3.

2

431-

1.5-

2.5

1.2-

2-4.

9

651-

1.5-

2.5

1.8-

2.7-

4.1

652.

4-3-

4.3

2.4-

3.6-

4.9

101

2.4-

3-4.

32.

6-3.

3-5.

1

128

2.7-

4-5.

82.

9-4-

6.3

152

2.7-

4-5.

82.

9-4.

4-6.

1

231

4.3-

5-7

4.3-

5.2-

7.9

312

4.9-

6.1-

8.2

4.9-

6.4-

8.8

396

5.2-

6.4-

9.4

5.6-

6.6-

9.9

484

5.8-

7-10

5.9-

7.1-

10.6

571

6.1-

7.6-

116.

4-7.

9-11

.5

198

4.3-

5-7

4.3-

5.1-

7.8

264

4.9-

6.1-

8.2

4.9-

6.3-

8.4

334

5.2-

6.4-

9.4

5.7-

6.6-

9.6

404

5.8-

7.0-

105.

8-7.

1-10

.4

472

6.1-

7.6-

116.

2-7.

8-11

.3

152

2.9-

3.7-

5.2

3.2-

4.5-

6.3

982.

9-3.

7-5.

23.

2-4.

1-5.

9

130

3.4-

4.3-

63.

7-4.

7-6.

6

164

3.8-

4.5-

6.7

4.1-

5.2-

6.9

198

4.4-

5.2-

7.6

4.7-

5.6-

8

231

4.6-

5.5-

85-

8.1-

8.7

180

3.4-

4.3-

64-

5.5-

7.1

252

3.8-

4.5-

6.7

4.2-

5.8-

7.6

302

4.4-

5.2-

7.6

4.8-

6-8.

2

360

4.6-

5.5-

85.

2-6.

2-9.

2

641.

9-2.

1-3

1.7-

3.2-

5

981.

9-2.

1-3

2.6-

4-5.

0

130

1.8-

2.4-

43-

4.4-

6.1

164

2.1-

3-4.

33.

8-5.

5-7.

1

198

2.4-

3.4-

4.6

4.4-

5.9-

7.9

231

2.7-

3.7-

4.9

5-6.

3-8.

5

901.

8-2.

4-4

3-3.

9-6

112

2.1-

3-4.

33.

4-4.

1-6.

9

132

2.4-

3.4-

4.6

4-4.

9-7.

2

152

2.7-

3.7-

4.9

4.2-

5.5-

8

661.

8-2.

4-4

3-3.

9-5.

2

852.

1-3-

4.3

3.1-

4-6.

4

942.

4-3.

4-4.

64-

4.3-

6.8

112

2.7-

3.7-

4.9

4.1-

5-7.

2

1300

1000

900

800

500

400

300

200

150

100

375

x 37

530

0 x

300

225

x 22

515

0 x

150

450 x

450

525 x

525

600 x

600

5025

1.0

1.5 2.0

2.5

3.0 3.5

(6) (5)

(4) (3)

(2)

(1)

NC

8020

105

0

6050

4030

2015

NC

v k

1.5 2

2.5 3

3.5

4.3 6 8 10 14

0.50

0.25

met

/sec

.m

et/s

ec.

V t2.5 3 4

4.5 5 6 9 11 15 20

ENG

INEE

RIN

G A

ND

PERF

ORM

AN

CE

DA

TA

Easy

sel

ectio

n gr

aphs

for C

eilin

g Di

ffuse

rs -

Squ

are

Type

- M

odel

CD

and

CDC

4 W

ay, 3

Way

, 2 W

ay a

nd 1

Way

150

x 15

0; 2

25 x

225

300

x 30

037

5 x

375

450

x 45

052

5 x

525

600

x 60

0

(1)

(2)

(3)

(4)

(5)

(6)

Tota

l pre

ssur

e Dr

op

Pt(P

a)

Cor

rect

ion

fact

ors

for T

hrow

:

N =

Nom

inal

size

= L

x W

4 W

ay

2W

ay

1

Way

3 W

ay

T yT x

x 1

x 1

x 1.

10x

1.13

x 1.

20


29 30


1 1.5

2.0

2.5

3.0

3.5

525 x

300

450 x

300

450 x

225

450

x 15

0

300

x 22

5

300

x 15

022

5 x

150

600

400

150

100

5025

Air

volu

me

V =

Lt./

sec.

Indu

ctio

n a

nd T

empe

ratu

re c

o-ef

ficie

nt

Indu

ctio

n i

=

Tem

p. c

o-ef

ficie

nt =

t x

t x

t 0

t 0

V 0V x=

0.8

(

(

V xV 0v x

max

.

2.

5 2

1.5

1

0.

5

0.25

t XC

4.4

3.

52

2.6

4

1.76

0.88

0

.44

4 W

ay

3 W

ay

2W

ay

1

Way

T xT y

T y

T yt 0

T x

T x

x 1

x 1

x 1

x 1.

10x

1.13

x 1.

20

Cor

rect

ion

fact

ors

for T

hrow

:

V t=

0.2

5 m

et./s

ec.

225

x 15

030

0 x

150

450

x 15

0; 3

00 x

225

450

x 22

545

0 x

300;

525

x 3

00

(1)

(2)

(3)

(4)

(5)

4.0

5.0

7.0

1 1

11.58.0

7.0

6.04.0

3.0

2.5

3.2

ENG

INEE

RIN

G A

ND

PERF

ORM

AN

CE

DA

TAEa

sy s

elec

tion

grap

hs fo

r Cei

ling

Diffu

sers

- R

ecta

ngul

ar T

ype

- M

odel

CD

and

CDC

4 W

ay, 3

Way

, 2 W

ay a

nd 1

Way

(5) (4

)

(3)

(2) (1

)

6050

4030

2015

NC

Vk

CEILING DIFFUSERS FIXING DETAILS

Type ‘C’ fixing.

NOTE:Standard supply is

Ceiling Diffusers Fixing Details

Type ‘C’ fixing:

Recommended for ceiling and sill applications.

Concealed type fixing with springloaded removable core

Recommended for ceiling andsill applications.

A counter- sunk screw type fixing

Type ‘S’ fixing:

Type ‘C’ fixing:

Recommended for ceiling and sill applications.

Concealed typefixing with Snap inT-bar suspension


31 32


CEILING DIFFUSERS ORDERING DATA

Natural anodised aluminium

Powder coated colour finish. (Mention RAL colour number)

Mill finish aluminium

Available finishes:

Mill finish aluminium

Available finishes for the accessories :

Powder coated in black matt finish

Ordering Data:

Specify

1. TECNALCO type and model2. Nominal size - L x W3. Quantity

5. Surface finish4. Type of fixing

6. Remarks

Example:

CDS 4 way 450 x 450 mm 50 nos. Type ‘C’ fixing Powder coated finish

1. 2. 3. 4. 5. 6.

RAL 9016D DamperMill finishSponge gasketrequired


33

Date post:	20-Mar-2020
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