Type VDW

With low sound power level for comfort zones, with individually manually adjustable air control blades

Circular and square ceiling swirl diffusers for high room air change rates

  • Nominal sizes 300, 400, 500, 600, 625, 825
  • Volume flow rate range 7 – 470 l/s or 25 – 1692 m³/h
  • Diffuser face made of galvanised sheet steel, powder-coated
  • For supply and extract air
  • For variable and constant volume flows
  • For all types of ceiling systems, and with an extended border also suitable for freely suspended installation
  • High induction results in a rapid reduction of the temperature difference and airflow velocity
  • Air change rates of up to 35 per hour can be achieved by arranging several diffusers in a row with a minimum pitch of 0.9 m (centre line to centre line)
  • Ideal for comfort zones


Optional equipment and accessories

  • Exposed diffuser face available in RAL CLASSIC colours, air control blades in black or white
  • Horizontal or vertical duct connection
  • Plenum box with cord-operated damper blade and pressure tap

VDW-Q-Z/500×24 00134073_0


  • Application
  • Description

Application

  • Type VDW ceiling swirl diffusers are used as supply air or extract air diffusers for comfort zones
  • Attractive design element for building owners and architects with demanding aesthetic requirements
  • Horizontal swirling supply air discharge for mixed flow ventilation
  • The efficient swirl creates high induction levels, thereby rapidly reducing the temperature difference and airflow velocity (supply air variant)
  • Individually adjustable air control blades to meet individual requirements
  • For variable and constant volume flows
  • For supply air to room air temperature differences from –12 to +10 K
  • For room heights up to 4 m (lower edge of suspended ceiling)
  • For all types of ceiling systems
  • With an extended border also suitable for freely suspended installation (supply air variant)

Special characteristics

  • Air control blades can be adjusted individually manually for adjusting the air pattern
  • For all types of ceiling systems, and with an extended border also suitable for freely suspended installation
  • Black or white air control blades
  • Air change rates of up to 35 per hour can be achieved by arranging several diffusers in a row with a minimum pitch of 0.9 m (centre line to centre line)

Nominal sizes

  • 300 × 8, 400 × 16, 500 × 24, 600 × 24, 600 × 48, 625 × 24, 625 × 54, 825 × 72

Variants

  • VDW-Q: Square diffuser face
  • VDW-R: Circular diffuser face
  • VDW-*-Z: Supply air
  • VDW-*-A: Extract air


Connection

  • H: Horizontal duct connection
  • V: Vertical duct connection

Parts and characteristics

  • Circular or square diffuser face
  • Diffuser face with individually manually adjustable air control blades
  • Simple installation of the diffuser face due to central fixing screw with decorative cap
  • Damper blade for volume flow rate balancing (optional)

Attachments

  • M: Damper blade for volume flow rate balancing
  • MN: Pressure tap and cord-operated damper blade for volume flow rate balancing with the diffuser face in place

Accessories

  • Lip seal

Construction features

  • Spigot suitable for circular ducts to EN 1506 or EN 13180
  • Spigot with groove for lip seal (if accessory lip seal has been ordered)

Materials and surfaces

  • Diffuser face made of galvanised sheet steel
  • V, H: Plenum box and cross bar made of galvanised sheet steel
  • X: Plenum box made of plastic and galvanised sheet steel
  • Air control blades made of plastic, UL 94, V-0, flame retardant
  • Lip seal made of rubber
  • Exposed diffuser face powder-coated RAL 9010, pure white
  • P1: Powder-coated, RAL CLASSIC colour
  • Air control blades for supply air similar to RAL 9005, black; extract air variant without air control blades
  • Q11: Air control blades for extract air similar to RAL 9005, black
  • Q21: Air control blades for supply air and extract air similar to RAL 9010, white

Standards and guidelines

  • Sound power level of the air-regenerated noise measured according to EN ISO 5135

Maintenance

  • Maintenance-free as construction and materials are not subject to wear
  • Inspection and cleaning to VDI 6022

Technical information

Function, Technical data, Quick sizing, Specification text, Order code

  • Function
  • Technical data
  • Quick sizing
  • Specification text
  • Order code

Functional description

Ceiling swirl diffusers in air conditioning systems create a swirl to supply air to rooms. The resulting airflow induces high levels of room air, thereby rapidly reducing the airflow velocity and the temperature difference between supply air and room air. Ceiling swirl diffusers allow for large volume flow rates. The result is a mixed flow ventilation in comfort zones, with good overall room ventilation, creating only very little turbulence in the occupied zone.

Type VDW ceiling swirl diffusers have adjustable air control blades. The air pattern can be adjusted to meet different local requirements. Horizontal air discharge is one-way, two-way or omni directional. Vertical air discharge is possible but only for heating. The supply air to room air temperature difference may range from –12 to +10 K.

A damper blade (optional) simplifies volume flow rate balancing for commissioning. Pressure tap and cord-operated damper blade (optional) allow for volume flow rate balancing with the diffuser face in place.

To give rooms an aesthetic, uniform look, Type VDW diffusers may also be used for extract air. Air control blades are not required for extract air applications.

Nominal sizes

300, 400, 500, 600, 625, 825 mm

Minimum volume flow rate, with ΔtZ = –6 K 

7 – 99 l/s or 25 – 357 m³/h

Maximum volume flow rate, with LWA ≅ 50 dB(A)

80 – 470 l/s or 288 – 1692 m³/h

Supply air to room air temperature difference

–12 to +10 K


Quick sizing tables provide a good overview of the volume flow rates and corresponding sound power levels and differential pressures.

The minimum volume flow rates apply to a supply air to room air temperature difference of –6 K.

The maximum volume flow rates apply to a sound power level of approx. 50 dB (A) with damper blade position 0°.

Exact values for all parameters can be determined with our Easy Product Finder design programme.

VDW-*-Z-H (supply air), sound power level and total differential pressure

Nominal size V Damper blade position
Nominal size V 45° 90°
Nominal size V Δpt LWA Δpt LWA Δpt LWA
Nominal size l/s m³/h Pa dB(A) Pa dB(A) Pa dB(A)

300 × 8

7

26

1

<15

1

<15

1

<15

300 × 8

35

126

15

23

18

22

30

24

300 × 8

60

216

45

39

53

38

87

40

300 × 8

85

306

91

50

105

50

174

51

400 × 16

13

46

1

<15

1

<15

1

<15

400 × 16

60

216

13

22

15

23

28

25

400 × 16

100

360

36

38

42

39

78

42

400 × 16

140

504

71

50

83

50

154

54

500 × 24

19

70

1

<15

1

<15

3

<15

500 × 24

70

252

11

19

14

19

34

24

500 × 24

125

450

35

38

45

37

108

42

500 × 24

175

630

68

50

89

49

212

54

600 × 24, 625 × 24

28

102

1

<15

1

<15

2

<15

600 × 24, 625 × 24

105

378

11

20

15

21

33

22

600 × 24, 625 × 24

165

594

26

34

37

34

83

36

600 × 24, 625 × 24

260

936

65

50

91

51

205

55

600 × 48

40

145

1

<15

2

<15

5

<15

600 × 48

130

468

12

21

18

23

50

29

600 × 48

210

756

32

37

47

40

131

45

600 × 48

305

1098

67

50

98

55

276

60

625 × 54

52

186

2

<15

2

<15

7

<15

625 × 54

140

504

13

22

16

24

48

33

625 × 54

225

810

34

38

41

39

125

51

625 × 54

310

1116

64

50

77

52

238

64

825 × 72

99

357

2

<15

4

<15

10

<15

825 × 72

225

810

13

24

21

27

51

33

825 × 72

400

1440

41

44

65

49

161

54

825 × 72

470

1692

56

50

90

57

222

61


VDW-*-Z-V (supply air), sound power level and total differential pressure

Nominal size V Damper blade position
Nominal size V 45° 90°
Nominal size V Δpt LWA Δpt LWA Δpt LWA
Nominal size l/s m³/h Pa dB(A) Pa dB(A) Pa dB(A)

300 × 8

7

26

1

<15

1

<15

1

<15

300 × 8

30

108

12

20

14

20

22

21

300 × 8

55

198

41

38

46

38

74

39

300 × 8

80

288

87

50

98

51

157

52

400 × 16

13

46

1

<15

1

<15

1

<15

400 × 16

55

198

11

21

13

20

26

20

400 × 16

100

360

38

39

44

40

85

40

400 × 16

140

504

74

50

86

51

167

52

500 × 24

19

70

1

<15

1

<15

3

<15

500 × 24

70

252

10

18

14

21

35

24

500 × 24

125

450

31

36

45

40

112

43

500 × 24

180

648

65

50

94

54

233

59

600 × 24, 625 × 24

28

102

1

<15

1

<15

2

<15

600 × 24, 625 × 24

100

360

10

22

13

23

30

26

600 × 24, 625 × 24

170

612

28

38

38

40

87

43

600 × 24, 625 × 24

240

864

56

50

75

54

174

57

600 × 48

40

145

1

<15

2

<15

4

<15

600 × 48

120

432

10

22

16

26

39

31

600 × 48

200

720

27

38

43

44

109

48

600 × 48

280

1008

53

50

85

58

214

63

625 × 54

52

186

2

<15

3

<15

7

<15

625 × 54

130

468

10

23

16

26

42

33

625 × 54

210

756

27

38

42

44

109

49

625 × 54

290

1044

51

50

81

59

208

62

825 × 72

99

357

3

<15

4

<15

10

<15

825 × 72

210

756

11

25

17

27

46

28

825 × 72

320

1152

26

39

39

42

107

42

825 × 72

430

1548

47

50

70

55

193

54


Ceiling swirl diffusers with square or circular diffuser face. Supply air and extract air variants for comfort zones, for a maximum air change rate of 35 per hour. Diffuser face with individually manually adjustable air control blades for horizontal swirling supply air discharge creating high induction levels. For installation into all types of suspended ceilings.

Ready-to-install component which consists of the diffuser face with radially arranged, individually adjustable black or white air control blades, and of a plenum box, equalising element (only supply air variants), side entry or top entry spigot, cross bar, and suspension holes or suspension lugs.

The diffuser face is fixed to the cross bar with a central screw, concealed by a decorative cap.

Spigot suitable for ducts to EN 1506 or EN 13180.

Sound power level of the air-regenerated noise measured according to EN ISO 5135.

Special characteristics

  • Air control blades can be adjusted individually manually for adjusting the air pattern
  • For all types of ceiling systems, and with an extended border also suitable for freely suspended installation
  • Black or white air control blades
  • Air change rates of up to 35 per hour can be achieved by arranging several diffusers in a row with a minimum pitch of 0.9 m (centre line to centre line)

Materials and surfaces

  • Diffuser face made of galvanised sheet steel
  • V, H: Plenum box and cross bar made of galvanised sheet steel
  • X: Plenum box made of plastic and galvanised sheet steel
  • Air control blades made of plastic, UL 94, V-0, flame retardant
  • Lip seal made of rubber
  • Exposed diffuser face powder-coated RAL 9010, pure white
  • P1: Powder-coated, RAL CLASSIC colour
  • Air control blades for supply air similar to RAL 9005, black; extract air variant without air control blades
  • Q11: Air control blades for extract air similar to RAL 9005, black
  • Q21: Air control blades for supply air and extract air similar to RAL 9010, white

Technical data

  • Nominal sizes: 300, 400, 500, 600, 625, 825 mm
  • Minimum volume flow rate, with ΔtZ = –6 K: 7 – 99 l/s or 25 – 357 m³/h
  • Maximum volume flow rate, with LWA ≅ 50 dB(A): 80 – 470 l/s or 288 – 1692 m³/h
  • Supply air to room air temperature difference: –12 to +10 K

Sizing data

  • V _______________________ [m³/h]
  • Δpt _______________________ [Pa]

Air-regenerated noise

  • LWA _______________________ [dB(A)]

00133699_0

 Type
VDW       Swirl diffuser

 Construction style
R       Circular
Q       Square

 System
Z       Supply air
A       Extract air

 Connection
H       Horizontal
V       Vertical

 Damper blade for volume flow rate balancing
       No entry: without damper blade
M       With
MN       With cords and pressure tap (only for connection H)

 Accessories
       No entry: without accessories
L       With lip seal

 

 Nominal size [mm]
300 × 8
400 × 16
500 × 24
600 × 24
600 × 48
625 × 24

       VDW-Q only
625 × 54
825 × 72

 Colour of air control blades
No entry: supply air – black air control blades, extract air – no air control blades
Q11       Extract air – black air control blades
Q21       Supply air – white air control blades
       Extract air – white air control blades

 Exposed surface
       No entry: powder-coated RAL 9010, pure white
P1       Powder-coated, specify RAL CLASSIC colour

       Gloss level
       RAL 9010 50 %
       RAL 9006 30 %
       All other RAL colours 70 %

Order example: VDW–Q–Z–H–MN–L/600×24/Q21/P1–RAL 9006

Construction style

Square

System

Supply air

Connection

Horizontal

Damper blade for volume flow rate balancing

With cords and pressure tap

Accessories

Lip seal

Nominal size

600 × 24

Colour of air control blades

White

Exposed surface

RAL 9006, white aluminium, gloss level 30%


 

Variants, Dimensions and weight, Product details

  • Variants
  • Dimensions and weight
  • Product details

VDW-Q-*-H

Designed for high comfort

Together with renowned designers and architects we have developed ceiling, wall, staircase and floor diffusers and grilles that are not only aesthetic design elements, but also meet demanding ventilation and acoustic requirements.

Variant

  • Ceiling swirl diffuser with square diffuser face
  • With plenum box for horizontal duct connection

Nominal sizes

  • 300 × 8, 400 × 16, 500 × 24, 600 × 24, 600 × 48, 625 × 24, 625 × 54, 825 × 72

Parts and characteristics

  • Square diffuser face
  • Plenum box for horizontal duct connection
  • Square opening to accommodate the diffuser face
  • Equalising element that ensures a uniform airflow through the diffuser face (supply air variant)
  • Simple installation of the diffuser face due to central fixing screw with decorative cap
  • Damper blade for volume flow rate balancing (optional)
  • Pressure tap and cord-operated damper blade for volume flow rate balancing (optional)
  • Lip seal (optional)

Construction features

  • Spigot suitable for circular ducts to EN 1506 or EN 13180
  • Spigot with groove for lip seal (if accessory lip seal has been ordered)

VDW-Q-*-V

Designed for high comfort

Together with renowned designers and architects we have developed ceiling, wall, staircase and floor diffusers and grilles that are not only aesthetic design elements, but also meet demanding ventilation and acoustic requirements.

Variant

  • Ceiling swirl diffuser with square diffuser face
  • With plenum box for vertical duct connection

Nominal sizes

  • 300 × 8, 400 × 16, 500 × 24, 600 × 24, 600 × 48, 625 × 24, 625 × 54, 825 × 72

Parts and characteristics

  • Square diffuser face
  • Plenum box for vertical duct connection
  • Circular opening to accommodate the diffuser face
  • Equalising element that ensures a uniform airflow through the diffuser face (supply air variant)
  • Simple installation of the diffuser face due to central fixing screw with decorative cap
  • Damper blade for volume flow rate balancing (optional)
  • Lip seal (optional)

Construction features

  • Spigot suitable for circular ducts to EN 1506 or EN 13180
  • Spigot with groove for lip seal (if accessory lip seal has been ordered)

VDW-R-*-H

Designed for high comfort

Together with renowned designers and architects we have developed ceiling, wall, staircase and floor diffusers and grilles that are not only aesthetic design elements, but also meet demanding ventilation and acoustic requirements.

Variant

  • Ceiling swirl diffuser with circular diffuser face
  • With plenum box for horizontal duct connection

Nominal sizes

  • 300 × 8, 400 × 16, 500 × 24, 600 × 24, 600 × 48, 625 × 24

Parts and characteristics

  • Circular diffuser face
  • Plenum box for horizontal duct connection
  • Circular opening to accommodate the diffuser face
  • Equalising element that ensures a uniform airflow through the diffuser face (supply air variant)
  • Simple installation of the diffuser face due to central fixing screw with decorative cap
  • Damper blade for volume flow rate balancing (optional)
  • Pressure tap and cord-operated damper blade for volume flow rate balancing (optional)
  • Lip seal (optional)

Construction features

  • Spigot suitable for circular ducts to EN 1506 or EN 13180
  • Spigot with groove for lip seal (if accessory lip seal has been ordered)

VDW-R-*-V

Designed for high comfort

Together with renowned designers and architects we have developed ceiling, wall, staircase and floor diffusers and grilles that are not only aesthetic design elements, but also meet demanding ventilation and acoustic requirements.

Variant

  • Ceiling swirl diffuser with circular diffuser face
  • With plenum box for vertical duct connection

Nominal sizes

  • 300 × 8, 400 × 16, 500 × 24, 600 × 24, 600 × 48, 625 × 24

Parts and characteristics

  • Circular diffuser face
  • Plenum box for vertical duct connection
  • Circular opening to accommodate the diffuser face
  • Equalising element that ensures a uniform airflow through the diffuser face (supply air variant)
  • Simple installation of the diffuser face due to central fixing screw with decorative cap
  • Damper blade for volume flow rate balancing (optional)
  • Lip seal (optional)

Construction features

  • Spigot suitable for circular ducts to EN 1506 or EN 13180
  • Spigot with groove for lip seal (if accessory lip seal has been ordered)

VDW-Q-*-H

Nominal size
□Q1
mm
H1
mm
□Q3
mm
H3
mm
ØD
mm
A
mm
C
mm
Plenum box
m
kg
300 × 8 298 8 290 250 158 139 50 AK-Uni-001 3.7
400 × 16 398 8 372 295 198 164 50 AK-Uni-002 5.7
500 × 24 498 8 476 295 198 164 50 AK-Uni-003 7.8
600 × 24 598 8 567 345 248 199 48 AK-Uni-004 11.1
600 × 48 598 8 590 345 248 189 48 AK-Uni-005 11.4
625 × 24 623 8 567 345 248 199 48 AK-Uni-004 11.3
625 × 54 623 8 615 345 248 189 48 AK-Uni-006 12.0
825 × 72 825 8 806 410 313 222 50 AK-Uni-007 21.2

Weights apply to the supply air variant


VDW-Q-*-V

Nominal size
□Q1
mm
H1
mm
ØD3
mm
H3
mm
ØD
mm
C
mm
m
kg
300 × 8 298 8 275 200 158 50 2.7
400 × 16 398 8 364 200 198 50 4.2
500 × 24 498 8 462 200 198 50 6.0
600 × 24 598 8 559 200 248 48 8.4
600 × 48 598 8 575 300 248 48 9.6
625 × 24 623 8 559 200 248 48 8.6
625 × 54 623 8 600 300 248 48 10.3
825 × 72 825 8 796 300 313 50 16.2

Weights apply to the supply air variant


VDW-R-*-H

Nominal size
ØD1
mm
H1
mm
□Q3
mm
H3
mm
ØD4
mm
H4
mm
ØD
mm
A
mm
C
mm
Plenum box
m
kg
300 × 8 300 8 290 285 278 250 158 174 50 AK-Uni-013 3.9
400 × 16 400 8 372 330 362 295 198 199 50 AK-Uni-014 6.0
500 × 24 500 8 476 330 460 295 198 199 50 AK-Uni-015 8.3
600 × 24 600 8 567 380 557 345 248 234 48 AK-Uni-016 11.3
600 × 48 600 8 590 380 578 345 248 224 48 AK-Uni-017 11.6
625 × 24 625 8 567 380 557 345 248 234 48 AK-Uni-016 11.5

Weights apply to the supply air variant


VDW-R-*-V

Nominal size
ØD1
mm
H1
mm
ØD3
mm
H3
mm
ØD
mm
C
mm
m
kg
300 × 8 300 8 275 200 158 50 2.5
400 × 16 400 8 364 200 198 50 3.9
500 × 24 500 8 462 200 198 50 5.6
600 × 24 600 8 559 200 248 48 7.5
600 × 48 600 8 575 300 248 48 8.7
625 × 24 625 8 559 200 248 48 7.7

Weights apply to the supply air variant


VDW-Q

Nominal size
□Q1
mm
ØD2
mm
n
Aeff

300 × 8 298 269 8 0.0070
400 × 16 398 352 16 0.0140
500 × 24 498 440 24 0.0210
600 × 24 598 546 24 0.0295
600 × 48 598 568 48 0.0390
625 × 24 623 546 24 0.0295
625 × 54 623 594 54 0.0470
825 × 72 825 773 72 0.0730

n = no. of air control blades


VDW-R

Nominal size
ØD1
mm
ØD2
mm
n
Aeff

300 × 8 300 269 8 0.0070
400 × 16 400 352 16 0.0140
500 × 24 500 440 24 0.0210
600 × 24 600 546 24 0.0295
600 × 48 600 568 48 0.0390
625 × 24 625 546 24 0.0295

n = no. of air control blades


Installation examples, Installation details, Commissioning, Basic information and nomenclature

  • Installation examples
  • Installation details
  • Commissioning
  • Basic information and nomenclature

Installation and commissioning

  • Preferably for rooms with a clear height up to 4.0 m
  • Flush ceiling installation
  • Freely suspended installation only with an extended border (supply air variant)
  • Horizontal or vertical duct connection
  • If necessary, carry out volume flow rate balancing with the damper blade


These are only schematic diagrams to illustrate installation details.

Volume flow rate balancing

When several diffusers are connected to just one volume flow controller, it may be necessary to balance the volume flow rates.

  • Ceiling diffusers with universal plenum box and damper blade (variant -M): The diffuser face can be removed to access the damper blade; the damper blade can then be set to any position between 0 and 90°
  • Ceiling diffusers with universal plenum box, damper blade and pressure tap (variant -MN): The diffuser face need not be removed since the damper blade can be set with two cords (white and green).

Volume flow rate measurement

Ceiling diffusers with universal plenum box, damper blade and pressure tap (variant -MN) allow for volume flow rate balancing even with the diffuser face in place.

  • Connect the measuring tube to the digital manometer
  • Read the effective pressure
  • Read the volume flow rate off the characteristic or calculate it
  • If necessary, adjust the damper blade position with the cords


A characteristic is included with each AK-Uni plenum box.

Principal dimensions

ØD [mm]

Outer diameter of the spigot

ØD₁ [mm]

Outer diameter of a circular diffuser face

ØD₂ [mm]

Diameter of a circular diffuser face style

ØD₃ [mm]

Diameter of a circular plenum box

□Q₁ [mm]

Outer diameter of a square diffuser face

□Q₂ [mm]

Dimensions of a square diffuser face style

□Q₃ [mm]

Dimensions of a square plenum box

H₁ [mm]

Distance (height) from the lower edge of the suspended ceiling to the lower edge of the diffuser face

H₂ [mm]

Height of a ceiling diffuser, from the lower edge of the suspended ceiling to the upper edge of the spigot

H₃ [mm]

Height of a ceiling diffuser with plenum box, from the lower edge of the suspended ceiling to the upper edge of the plenum box or of the spigot

A [mm]

Position of the spigot, defined by the distance of the spigot centre line to the lower edge of the suspended ceiling

C [mm]

Length of the spigot

m [kg]

Weight

Definitionen

LWA [dB(A)]

Schallleistungspegel des Strömungsgeräusches, A-bewertet

V [m³/h] und [l/s]

Volumenstrom

Δtz [K]

Zulufttemperaturdifferenz, Zulufttemperatur minus Raumtemperatur

Δpt [Pa]

Gesamtdruckdifferenz


Alle Schallleistungspegel basieren auf 1 pW.

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Visual contact Visual contact

Your message is send and will be processed shortly.
Our department for Service-Requests will contact you asap.
For general question regarding products or services you can also call:
Tel.: +49 (0)2845 / 202-0 | Fax: +49 (0)2845/202-265