EXHAUST GRILL AND AIR LOUVER PERFORATED GRILL AIR LOUVER. · EXHAUST GRILL AND AIR LOUVER Perforated

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  • EXHAUST GRILL AND AIR LOUVER

    Perforated Ceiling Diffusers

    OptimaAIR DIFFUSION PRODUCTS

    PERFORATED DIFFUSERS

    OPTIMA ceiling diffuser with perforated face, arerecommended for heating, ventilating and cooling incentralized air conditioning systems.

    Perforated face diffusers, with 4-3-2 or 1 way patterndeflectors are adjustable for horizontal diffusion of airin their respective ways without change in air volume,pressure or sound level. 100% utilization of diffuserface area, regardless of pattern deflection, givesoptimum performance in terms of air handling characteristics.

    These diffusers have high diffusion induction rates,resulting in rapid temperature and velocity equalization of the mixed air mass, well above the zone of occupancy.

    Features:

    Efficient, draftless air distribution for all types ofceilings.

    Air pattern controllers do not damper the air in anyway. Flow rate and sound level remain constantregardless of air pattern required.

    Air pattern controllers can be replaced to any desired pattern.

    Perforated surface plate completely conceals pattern controllers.

    Always available in powder coated finish in any color to match with the false ceiling grid.

    For supply diffusers, perforated face is dropped slightly below the ceiling.

    Concealed fixing and easily removable perforated face, give easy access to air pattern deflectors and controldamper.

    Suitable for installation into tiled ceilings.

    Spigot air inlets are available in a variety of sizes, suitable for flexible duct connections.

    Standard square sizes:

    N

    A

    B

    Fw

    =

    =

    =

    =

    Nominal size = L x W

    Neck size

    Overall face size

    Frame width = 30/25/20mm widths available

    L W

    300

    400

    500

    600

    300

    400

    500

    600

    1

  • EXHAUST GRILL AND AIR LOUVER

    OPTIMA model OPD-1 is asupply perforated ceiling diffuserhaving directional ceiling diffusercomplete pattern deflectors with4-3-2 or way horizontal air diffusion.

    The spigot damper, provided atthe neck of the plenum of the diffuser, is optional.

    1.2.3.4.5.6.7.

    Perforated face plateAir patternRound neckSpigot damperPlenum boxAcoustic linerBorder frame

    OPTIMA model OPD-2 is asupply perforated ceiling diffuserhaving a baffle plate which diffusesthe air vertically downwards for applications requiring localizedspot cooling or heating.

    The spigot damper, provided atthe neck of the plenum of the diffuser is optional.

    (4)

    (3)

    (2)

    (6)

    (5)

    W

    d

    (7)(1)

    B

    AFw

    h

    W

    d

    B

    AFw

    h

    Perforated Ceiling Diffusers

    OptimaAIR DIFFUSION PRODUCTS

    PERFORATED DIFFUSERS

    2

  • EXHAUST GRILL AND AIR LOUVER

    Standard sizes and dimensions for angular and straight box plenums

    N A B h d h1

    300 x 300

    400 x 400

    500 x 500

    600 x 600

    280

    380

    480

    580

    340

    440

    540

    640

    310

    340

    390

    460

    155

    175

    205

    245

    75

    75

    100

    100

    NOTE:

    h height of the angular plenums /straight box plenumsh1 height of the return perforated diffuser plenums

    Perforated Diffusers

    Engineering and Performance Data

    The tabulated performance data includes Area factor, Throw pattern, Discharge velocity and Sound power level.

    Air volume q :v

    Throw T :

    3Air volumes are given in mt /h

    The throw values given in the tables are related to the perforated diffuser placednearer to the ceiling.Two throw values are given for each qv to the corresponding terminal velocities V .tMinimum Throw 0.50 m/sec. VtMaximum Throw 0.5 m/sec. Vt

    Discharge Velocity V :k

    NC values :

    Outlet size :

    The effective discharge velocities given are related to the corresponding effectivefree area A .k

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

    sound power levels.

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

    Constructional Details and Dimensions

    OptimaAIR DIFFUSION PRODUCTS

    PERFORATED DIFFUSERS

    3

  • EXHAUST GRILL AND AIR LOUVER

    Selection table for Perforated Ceiling Diffusers

    N. Sizemm V m/sk 1.5 2 2.5 3 3.5 4 5 6

    300 x 3000.018

    400 x 4000.034

    500 x 5000.055

    600 x 6000.080

    3m /hThrow (m)N.C.

    3m /hThrow (m)N.C.

    3m /hThrow (m)N.C.

    3m /hThrow (m)N.C.

    950.4 - 0.6

    < 20

    1830.6 - 1< 20

    3001.2 - 2< 20

    4321.4 - 2.3

    < 20

    1300.6 - 1< 20

    2461.15 - 1.9

    20

    3961.6 - 2.5

    20

    5751.9 - 3.2

    20

    1601.1 - 1.8

    22

    3061.5 - 2.4

    25

    4951.9 - 3.1

    25

    7202.4 - 3.9

    25

    1901.3 - 2.1

    30

    3651.8 - 2.9

    30

    5952.3 - 3.8

    36

    8652.8 - 4.8

    35

    2251.6 - 2.55

    45

    4302.2 - 3.5

    40

    6952.7 - 4.5

    45

    10003.5 - 5.4

    40

    2601.8 - 2.9

    > 50

    4902.4 - 4

    50

    7903.1 - 5

    50

    11503.8 - 6

    50

    33242.25 - 3.6

    > 50

    6123 - 4.8> 50

    9903.9 - 6.4

    > 50

    14404.8 - 7.9

    > 50

    3882.7 - 4.3

    > 50

    7353.8 - 5.9

    > 50

    11804.7 - 7.5

    > 50

    17256 - 9> 50

    Throw Data:Correction Table for other directionsof discharging cores

    4 way 3 way 2 way 1 way

    x 1 x 1.05 x 1.10 x 1.15

    Induction and Temperature co-efficient

    t = 0.8x toVxVo

    Temp. co-efficient = txto

    Induction I = VxVo

    V max.x 2.5 2 1.5 1 0.5 0.25

    ot Cx 4.4 3.52 2.64 1.76 0.88 0.44

    Engineering and Performance Data

    OptimaAIR DIFFUSION PRODUCTS

    PERFORATED DIFFUSERS

    4

  • EXHAUST GRILL AND AIR LOUVER

    PERFORATED DIFFUSERS OptimaAIR DIFFUSION PRODUCTS

    En

    gin

    eeri

    ng

    an

    d P

    erfo

    rman

    ce D

    ata

    Eas

    y se

    lect

    ion

    gra

    ph

    s fo

    r P

    erfo

    rate

    d C

    eilin

    g D

    iffu

    sers

    4 W

    ay, 3

    Way

    , 2 W

    ay a

    nd

    1 W

    ay

    (1)

    (2)

    (3)

    1 W

    ay2

    Way

    3 W

    ay &

    4 W

    ayN

    =

    No

    min

    al s

    ize

    Tota

    l Pre

    ssur

    e D

    rop

    P(P

    a)t

    105

    100

    5040

    3020

    10

    5050

    4030

    20N

    .C.

    Vk

    1.5

    2.0

    2.5

    3.5 4 5 6

    N.C.

    (1)

    (2)

    (3)

    1700

    1500

    1200

    1000

    900

    800

    700

    600

    500

    40030

    0

    200

    100

    600

    0.08

    0

    500

    0.05

    5

    400

    0.03

    4

    300

    0.01

    8

    Air

    vol

    ume

    3

    V =

    mt.

    /hr.

    5

  • EXHAUST GRILL AND AIR LOUVER

    OptimaAIR DIFFUSION PRODUCTS

    Supply, Return, Extract Ceiling Diffusers

    Duct fixing and CoreRemoval:I n s e r t i o n o f d i f f u s e r c o r e i seffected by depressing core pinsprings in holes located at end ofborder frame and releasing corew h e n p i n s a r e a l i g n e d w i t h corresponding holes at opposite end offrame.

    Procedure is reversed for removalof core.

    Operation of OpposedBlade Damper:Blade arrangement distribution through diffuser throat. Provides positive control air volume from full open to full closed position,regardless of system pressure.The fu l l open to fu l l c losed position of damper to any degree canbe operated by a screw driverafter removing the internal core,which is shown in the figure.

    ensures uniform

    GENERAL NOTES:

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

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

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

    6

    CEILING DIFFUSERS

  • EXHAUST GRILL AND AIR LOUVER

    Product Model Description

    ROUND DIFFUSERS OptimaAIR DIFFUSION PRODUCTS

    Supply Round DiffusersORD-1

    Supply Round Diffusers are diffusers withbutterfly damper, can be used for supply air. They aresuitable for installation in ceilings. The circular designguarantees a uniform radial discharge in supply airapplication.

    Diffuser with Damper

    Diffuser without Damper

    Return Round DiffusersORD-2Return Round Diffusers, are diffusers withoutdamper. They can be used for Extract air, Suitable forinstallation in ceiling.

    7

  • EXHAUST GRILL AND AIR LOUVER

    Standard sizes

    ROUND DIFFUSERS OptimaAIR DIFFUSION PRODUCTS

    S.No.

    NECK SIZE A OUTER SIZE B FLANGEWIDTH

    Cmm

    DIFFUSERHEIGHT

    HmmInch mm Inch mm

    1.

    2.

    3.

    4.

    5.

    6.

    7.

    8.

    9.

    10.

    5.3

    7.5

    9.7

    11.9

    14.3

    16.4

    18.5

    20.5

    22.6

    24.6

    134

    190

    247

    303

    362

    416

    469

    521

    573

    625

    9.8

    12.1

    14.3

    16.5

    18.8

    21.0

    23.5

    25.7

    27.7

    29.8

    250

    307

    363

    419

    478