VDW_Q_img_03V1.png
VDW-Q-Z/500×24
Nominal sizes
□500×24
VDW_img_02psd.png

Circular diffuser faces with circular plenum box

VDW_Q_img_14V1psd.png

Square diffuser face with square plenum box

VDW_R_img_21V1.png

Circular face style with circular plenum box and top entry spigot

 

 

VDW_R_img_07V1psd.png

Circular diffuser face with white air control blades

VDW_Q_img_08V1psd.png

Air terminal device up to size 825

VDW_Q_img_03V1.png
VDW_img_02psd.png
VDW_Q_img_14V1psd.png
VDW_R_img_21V1.png
VDW_R_img_07V1psd.png
VDW_Q_img_08V1psd.png

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 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

  • Very high room air change rate due to row arrangement with a minimum pitch distance of 0.9 m

  • Ideal for comfort zones

  • Circular diffuser faces can be easily mounted without tools in a circular plenum box with horizontal spigot

 

Optional equipment and accessories

  • Exposed diffuser face available in RAL CLASSIC colours, air control blades in black or white

  • Horizontal or vertical duct connection

  • Square plenum box with cord-operated damper unit and pressure tap

 

 

 


General information

Application

  • 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)

  • For variable and constant volume flows

  • For supply air to room air temperature differences from -12 – +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 features

  • High induction results in a rapid reduction of the supply air to room air temperature difference and airflow velocity

  • For all types of ceiling systems, and with an extended border also suitable for freely suspended installation

  • Horizontal or vertical duct connection

  • Very high room air change rate possible thanks to row arrangement with a minimum pitch distance of 0.9 m



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 on

  • H: Horizontal duct connection

  • V: Vertical duct connection



Accessories

Lip seal

  • For circular plenum boxes with horizontal connection spigot, the lip seal is only available in combination with the flow adjustment damper. Otherwise, it can always be selected optionally.



Attachments

  • M: Damper element for volume flow rate balancing

  • MN: Pressure tap and cord-operated damper unit for volume flow rate balancing with the diffuser face in place (only possible with square plenum box)



Construction features

  • Spigot suitable for circular ducts to EN 1506 or EN 13180


Square plenum boxes and plenum boxes with vertical connection

  • With spigot made of galvanised sheet steel

  • Groove only available if lip density characteristic has been selected

 





Circular plenum boxes with horizontal spigot for nominal sizes 250, 400L, 400H and 600

  • Spigot made of black ABS

  • Spigots are fitted with a groove for a lip seal

  • Retrofitting of the lip seal is possible at a later stage

  • Damper blade and lip seal (optional) are factory fitted

  • Plenum box for supply air, with an optimised equalising element that ensures a uniform airflow through the diffuser face

  • Simple installation of the diffuser face due to central fixing screw with cap

  • Plenum box for supply air, with an optimised equalising element that ensures a uniform airflow through the diffuser face

  • Simple installation of the diffuser face due to central fixing screw with decorative cap




Materials and surfaces

  • Grille face made of galvanised sheet steel

  • Q; R: Plenum box made of galvanised sheet steel including galvanised sheet steel cross bar to support the diffuser face

  • Plenum boxes with vertical connection and square plenum boxes with horizontal connection: for supply air always with galvanised perforated plate for air distribution

  • Circular plenum boxes with horizontal spigot: Equipped as a plenum box for supply air with an equalising element made of polyester

  • Square plenum boxes and plenum boxes with vertical spigot: Spigot made of galvanised sheet steel

  • Circular plenum boxes with horizontal spigot: Spigot made of black ABS, according to UL94, V0 flame retardant

  • Air control blades made of plastic, UL 94, V-0, flame retardant

  • Lip seal made of Evoprene

  • Diffuser face 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

  • Low maintenance as construction and materials are not subject to wear

  • Inspection and cleaning to VDI 6022


Teknisk information

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

  • Function
  • TECHNICAL DATA
  • QUICK SIZING
  • SPECIFICATION TEXT
  • ORDER CODE
Schematic illustration of VDW-Q with square plenum box
① Diffuser face
② Central fixing screw
③ Adjustable air control blade
④ Plenum box
⑤ Cross bar
⑥ Suspension hole
⑦ Spigot
Optional
⑧ Lip seal
⑨ Damper blade for volume flow rate balancing
⑩ Pressure tap
⑪ Green cord for closing the damper blade
⑫ White cord for opening the damper blade
⑬ Measuring tube
⑭ Text label indicating plenum box variant

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 airflow direction can be adjusted to meet various local requirements. Horizontal air distribution consists of one-way, two-way or omni-directional flow. 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 sizes300, 400, 500, 600, 625, 825 mm
Minimum volume flow rate, with Δtz = -6 K7 – 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 – 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 program.



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

NSqv [l/s]qv [m³/h]0°45°90°
Δpt [Pa]LWA [dB(A)]Δpt [Pa]LWA [dB(A)]Δpt [Pa]LWA [dB(A)]
300 × 87261<151<151<15
300 × 835108122014202221
300 × 860198413846387439
300 × 8852888750985115752
400 × 1613461<151<151<15
400 × 1660198112113202620
400 × 16100360383944408540
500 × 2470252101814213524
500 × 241254503136454011243
500 × 241756486550945423359
600 × 24, 625 × 24281021<151<152<15
600 × 24, 625 × 24105360102213233026
600 × 24, 625 × 24165612283838408743
600 × 24, 625 × 242608645650755417457
600 × 48401451<152<154<15
600 × 48130432102216263931
600 × 482107202738434410948
600 × 4830510085350855821463
625 × 54140468102316264233
625 × 542257562738424410949
625 × 5431010445150815920862
825 × 72993573<154<1510<15
825 × 72225756112517274628
825 × 7247016924750705519354

0°, 45°, 90°: Damper blade position

 



 




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

NSqv [l/s]qv [m³/h]0°45°90°
Δpt [Pa]LWA [dB(A)]Δpt [Pa]LWA [dB(A)]Δpt [Pa]LWA [dB(A)]
300 × 87261<151<151<15
300 × 830108122014202221
300 × 855198413846387439
300 × 8802888750985115752
400 × 1613461<151<151<15
400 × 1655198112113202620
400 × 16100360383944408540
400 × 161405047450865116752
500 × 2419701<151<153<15
500 × 2470252101814213524
500 × 241254503136454011243
500 × 241806486550945423359
600 × 24, 625 × 24281021<151<152<15
600 × 24, 625 × 24100360102213233026
600 × 24, 625 × 24170612283838408743
600 × 24, 625 × 242408645650755417457
600 × 48401451<152<154<15
600 × 48120432102216263931
600 × 482007202738434410948
600 × 4828010085350855821463
625 × 54521862<153<157<15
625 × 54130468102316264233
625 × 542107562738424410949
625 × 5429010445150815920862
825 × 72993573<154<1510<15
825 × 72210756112517274628
825 × 7232011522639394210742
825 × 7243016924750705519354

0°, 45°, 90°: Damper blade position


Specification text

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 consisting of the diffuser face with radially arranged, individually adjustable black or white set of air control blades and a plenum box, which is also square in the case of square faceplates (-Q) and round in the case of rounded faceplates (-R). The plenum box has an equalising element for supply air. The plenum box always includes a horizontally or vertically arranged spigot, cross bar and drilled holes or suspension lugs for suspension. 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 features

  • High induction results in a rapid reduction of the supply air to room air temperature difference and airflow velocity


  • For all types of ceiling systems, and with an extended border also suitable for freely suspended installation

  • Horizontal or vertical duct connection

  • Very high room air change rate possible thanks to row arrangement with a minimum pitch distance of 0.9 m



Materials and surfaces

  • Grille face made of galvanised sheet steel

  • Q; R: Plenum box made of galvanised sheet steel including galvanised sheet steel cross bar to support the diffuser face

  • Plenum boxes with vertical connection and square plenum boxes with horizontal connection: for supply air always with galvanised perforated plate for air distribution

  • Circular plenum boxes with horizontal spigot: Equipped as a plenum box for supply air with an equalising element made of polyester

  • Square plenum boxes and plenum boxes with vertical spigot: Spigot made of galvanised sheet steel

  • Circular plenum boxes with horizontal spigot: Spigot made of black ABS, according to UL94, V0 flame retardant

  • Air control blades made of plastic, UL 94, V-0, flame retardant

  • Lip seal made of Evoprene

  • Diffuser face 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

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

  • Minimum volume flow rate, for ΔtZ = -6 K: 7 – 99 l/s or 26 – 357 m³/h

  • Maximum volume flow rate, at LWA ≅ 50 dB(A): 85 – 470 l/s or 306 – 1692 m³/h

  • Supply air to room air temperature difference: -12 to +10 K


VDW–Q–Z–H–M–L/500 × 24/Q21/P1 - RAL …
|||||||||
123456789
1 Type
VDW Swirl diffuser
 
2 Construction style 
R Circular
Q Square
 
3 System
Z Supply air
A extract air
 
4 Connection
H horizontal
V Vertical (the plenum box is always circular)
 
5 Damper blade for volume flow rate balancing
No entry required: Without damper unit
M With
MN With cords and pressure tap (only with square plenum box)
 
6 Accessories
No entry required: Without accessories
L with lip seal
 
7 Nominal size [mm]
300 × 8
400 × 16
500 × 24
600 × 24
600 × 48
625 × 24
 
VDW-Q only
625 × 54
825 × 72
 
8 Colour of air control blades
No entry required: 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
 
9 Exposed surface
No entry: powder-coated RAL 9010, pure white
P1 Powder-coated, specify RAL CLASSIC colour
 
Gloss level
RAL 9010 GU50
RAL 9006 GU30
All other RAL colours GU70
 
Note: Circular plenum boxes with horizontal spigot are only available without damper unit and lip seal or with damper unit and lip seal. Features 2 and 4 define the plenum box geometry.Order example: VDW–Q–Z–H–MN–L/600×24/Q21/P1–RAL 9006
StyleSquare
Air conditioning systemSupply air
Connection onhorizontal
Damper unit for volume flow rate balancingWith cord and pressure tap
AccessoriesLip seal
Nominal size600 × 24
Colour of air control elementsWhite
Exposed surfaceRAL 9006, white aluminium, GU30

 
Order example: VDW–R–Z–H–/400×16
StyleCircular
Air conditioning systemSupply air
Connection onhorizontal
Damper unit for volume flow rate balancingNone
AccessoriesNone
Nominal size400 × 16
Colour of air control elementsBlack
Exposed surfaceRAL 9010, pure white, GU50

Variants, Dimensions, Product details

  • VARIANTS
  • DIMENSIONS
  • PRODUCT DETAILS
VDW-Q-Z/300×8
VDW_Q_img_01V1.png
Nominal sizes
□300×8
VDW_Q_img_01V1.png
VDW_Q_img_02V1.png
VDW_Q_img_03V1.png
VDW_Q_img_04V1.png
VDW_Q_img_05V1.png
VDW_Q_img_06V1.png
VDW_Q_img_07V1.png
VDW_Q_img_08V1psd.psd.link
VDW_R_img_02V1.png
VDW_R_img_03V1.png
VDW_R_img_04V1.png
VDW_R_img_01V1.png
VDW_R_img_06V1.png
VDW_R_img_05V1.png

Nominal sizes

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


Accessories

  • 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

Variants

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


Nominal sizes

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


Accessories

  • 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

Variants

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


Nominal sizes

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


Accessories

  • Circular diffuser face
  • Plenum box for horizontal duct connection
  • 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 unit for volume flow rate balancing and lip seal, optional


Construction features

  • Spigot suitable for circular ducts to EN 1506 or EN 13180
  • Spigot made of plastic (ABS)




VDW-R-*-V

Variants

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



Nominal sizes

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


Accessories

  • 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)

Square diffuser face with plenum box for horizontal duct connection

VDW-Q-*-H

NS□Q₁H₁□Q₃H₃∅DAC①m
kg
300 × 8310829025015813950AK-Uni-0013.7
400 × 16398837229519816450AK-Uni-0025.7
500 × 24498847629519816450AK-Uni-0037.8
600 × 24598856734524819948AK-Uni-00411.1
600 × 48598859034524818948AK-Uni-00511.4
625 × 24623856734524819948AK-Uni-00411.3
625 × 54623861534524818948AK-Uni-00612
825 × 72825880641031322250AK-Uni-00721.2
① Plenum box
Weights apply to the supply air variant


VDW-Q-*-V
NS□Q₁H₁∅D₃H₃∅DCm
kg
300 × 83108275200158502.7
400 × 163988364200198504.2
500 × 244988462200198506
600 × 245988559200248488.4
600 × 485988575300248489.6
625 × 246238559200248488.6
625 × 5462386003002484810.3
825 × 7282587963003135016.2

Weights apply to the supply air variant




VDW-Q
NS□Q₁∅D₂nAeff
m²
300 × 831026980.0070
400 × 16398352160.0140
500 × 24498440240.0210
600 × 24598546240.0295
600 × 48598568480.0390
625 × 24623546240.0295
625 × 54623594540.0470
825 × 72825773720.0730
n = no. of air control blades



VDW-R-*-H
NS∅D₁H₁H₃∅D₃∅DA①m
kg
300 × 82738243274158139AKR-012.1
400 × 163628290363198166AKR-023.3
500 × 244608290461198166AKR-034.5
600 × 245738344574248195AKR-056.4
600 × 485738344574248195AKR-056.7
625 × 245738344574248195AKR-056.6

Weights apply to the supply air variant



VDW-R-*-V
NS∅D₁H₁∅D₃H₃∅DCm
kg
300 × 83008275200158502.5
400 × 164008364200198503.9
500 × 245008462200198505.6
600 × 246008559200248487.5
600 × 486008575300248488.7
625 × 246258559200248487.7
Weights apply to the supply air variant




 VDW-R
NS∅D₁∅D₂nAeff
m²
300 × 830026980.0070
400 × 16400352160.0140
500 × 24500440240.0210
600 × 24600546240.0295
600 × 48600568480.0390
625 × 24625546240.0295

n = no. of air control blades

Installation in T-bar ceilings

VDW-Q with black air control blades


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 element


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 square 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 square plenum box, damper blade and pressure tap (variant -MN): The diffuser face need not be removed as the damper blade can be set with two cords (white and green).


Volume flow rate measurement
Ceiling diffusers with square 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 plenum box.

Air patterns

  • AIR PATTERNS
Air control blades set to external swirl
VDW_Q_gc_12V1.png

VDW_Q_gc_12V1.png
VDW_Q_gc_13V1.png
VDW_Q_gc_01V1.png
VDW_Q_gc_08V1.png
VDW_Q_gc_02V1.png
VDW_Q_gc_07V1.png
VDW_Q_gc_09V1.png
VDW_Q_gc_06V1.png
VDW_Q_gc_10V1.png
VDW_Q_gc_14V1.png
VDW_Q_gc_03V1.png
VDW_Q_gc_11V1.png


Nedladdningar

produkt information

  • Print page VDW

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