TYPE DCS 

For horizontal swirling supply air discharge creating high induction levels, with fixed air control blades

Square ceiling swirl diffusers with perforated face plate, for comfort and industrial zones

  • Nominal diffuser face size 600
  • Volume flow rate range 4 – 260 l/s or 16 – 936 m³/h
  • Perforated diffuser face made of galvanised sheet steel, powder-coated with plain perimeter border and central screw fixing
  • For supply and extract air
  • For variable and constant volume flows
  • For all types of ceiling systems, particularly for T-bar ceilings
  • Swirl unit inside, 6 sizes, for the best swirl effect and high induction levels
  • Ideal for comfort zones


Optional equipment and accessories

  • Exposed diffuser face available in RAL CLASSIC colours
  • Horizontal or vertical duct connection
  • Plenum box with lining

Application

Application

  • Type DCS ceiling swirl diffusers are preferably used as supply air diffusers for comfort and industrial zones
  • Perfect integration with suspended perforated sheet metal ceilings
  • 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 –12 to +10 K
  • For room heights up to 4 m (lower edge of suspended ceiling)
  • For all types of ceiling systems

Special characteristics

  • Horizontal air discharge creating high induction levels
  • Design variants with perforated square diffuser face style
  • For all types of ceiling systems
  • Horizontal or vertical duct connection

Nominal sizes

  • Diffuser face: 600
  • Swirl diffuser: 125, 160, 200, 250, 315, 400

Description

Variants

  • DCS-P: Perforated diffuser face


Installation type

  • Q: Face mounted
  • QL: Lay-in flat 'T' bar
  • QS15: Tegular 'T' bar 15x8
  • QS26: Tegular 'T' bar 26x8
  • QM15: Tegular 'T' bar 15x16
  • QM26: Tegular 'T' bar 26x16
  • QB: Push-in spring 'T' (Burgess)


Connection

  • K: Vertical duct connection, with duct collar
  • AK: Diffuser suitable for horizontal plenum
  • RA: Diffuser suitable for return air baffle

Parts and characteristics

  • Square diffuser face - Nominal 46% F.A.
  • 7 standard border profiles to suit most ceilings
  • Swirl unit with radially arranged fixed air control blades

Construction features

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

Materials and surfaces

  • Diffuser face, discharge nozzle, swirl unit, duct collar and plenum box made of galvanised sheet steel
  • Plenum box lining is Class 'O' acoustic foam
  • Swirl unit and discharge nozzle powder-coated RAL9005, jet black
  • P3: Perforated face powder-coated RAL9010:20%
  • P6: Perforated face powder-coated, RAL CLASSIC colour, 30% gloss

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 DCS ceiling swirl diffusers have fixed blades. The swirl unit required for the swirling air discharge is situated inside the plenum box, concealed by a perforated plate, and hence not visible from the room. Air discharge is horizontal omni directional. The supply air to room air temperature difference may range from –12 to +10 K.

To give rooms an aesthetic, uniform look, Type DCS diffusers may also be used for extract air.

Nominal sizes – diffuser face

600 mm

Nominal sizes – swirl unit

125, 160, 200, 250, 315, 400 mm

Minimum volume flow rate, with ΔtZ = –6 K 

4 – 36 l/s or 16 – 128 m³/h

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

37 – 260 l/s or 132 – 936 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.

DCS-P-*-K, sound power level and total differential pressure

Nominal size V Δpt LWA
Nominal size l/s m³/h Pa dB(A)

125

15

54

10

20

125

19

68

15

27

125

22

79

20

31

125

24

86

25

33

160

24

86

10

21

160

29

104

15

26

160

34

122

20

29

160

38

137

25

32

200

38

137

10

22

200

47

169

15

28

200

54

194

20

32

200

61

220

25

35

250

56

202

10

24

250

68

245

15

30

250

78

281

20

34

250

87 

313

25

37

315

90

324

10

28

315

108

389

15

32

315

124 

446

20

36

315

140

504

25

38

400

116

418

10

25

400

140

504

15

31

400

160

576

20

35

400

180

648

25

39


DCS-P-..., -AK + AKV-...-ZH supply plenum, sound power level and total differential pressure

Nominal size V Δpt LWA
Nominal size l/s m³/h Pa dB(A)

125

13

47

10

<15

125

16

58

15

21

125

19

68

20

35

125

21

76

25

51

160

22

79

10

<15

160

27

97

15

20

160

32

115

20

36

160

36

130

25

50

200

33

119

10

<15

200

40

144

15

22

200

46

166

20

39

200

52

187

25

50

250

50

180

10

<15

250

60

216

15

23

250

70

252

20

38

250

78 

281

25

50

315

76

274

10

<15

315

90

324

15

25

315

106 

382

20

38

315

118

425

25

50

400

106

382

10

<15

400

128

461

15

25

400

150

540

20

39

400

166

598

25

50


DCS-P-..., -RA +AKV-,,,, -RA return air plenum, sound power level and total differential pressure

Nominal size V Δpt LWA
Nominal size l/s m³/h Pa dB(A)

600

138

497

10

<15

600

166

598

15

<15

600

198

713

20

<15

600

22079225<15




Design ceiling swirl diffusers with perforated square diffuser face, for comfort zones with particularly demanding requirements of aesthetics and design. For supply air or extract air. Excellent aerodynamic and acoustic function due to fixed air control blades for horizontal swirling air discharge, creating high levels of induction. For installation into all types of suspended ceilings.

Ready-to-install component which consists of the diffuser face, a top entry spigot or a plenum box with equalising element, a side entry spigot, and suspension lugs.

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

  • Horizontal air discharge creating high induction levels
  • Design variants with perforated square diffuser face style
  • For all types of ceiling systems
  • Horizontal or vertical duct connection

Materials and surfaces

  • Diffuser face, discharge nozzle, swirl unit, duct collar and plenum box made of galvanised sheet steel
  • Plenum box lining is Class 'O' acoustic foam
  • Swirl unit and discharge nozzle dip coated RAL 9005, jet black
  • P3: Perforated face powder-coated RAL 9010:20%
  • P6: Perforated face powder-coated RAL CLASSIC colour, 30% gloss


Technical data

  • Nominal size - diffuser face: 600mm
  • Nominal sizes – swirl unit: 125, 160, 200, 250, 315, 400 mm
  • Minimum volume flow rate, with Δt = –6 K: 4 – 36 l/s or 16 – 128 m³/h
  • Maximum volume flow rate, with LWA ≅ 50 dB(A): 37 – 260 l/s or 132 – 936 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)]

Order example: DCS–P–Q–AK/598×315/P6-RAL9006:30%/G

Construction style

Perforated diffuser face

Installation type

Face mounted

Connection

Diffuser suitable for horizontal plenum (supply)

Size of diffuser face plate

598x598

Nominal size

315 mm

Exposed surface

RAL 9006, silver grey, gloss level 30% grey

Screw ColourGrey

 

Variants, Dimensions and weight, Product details

  • Variants
  • DIMENSIONS AND WEIGHT

DCS-P-*-K

Variant

  • Ceiling swirl diffuser with perforated square diffuser face
  • Perforated diffuser face with plain perimeter border and central screw fixing

Nominal sizes

  • Diffuser face: 600
  • Swirl diffuser: 125, 160, 200, 250, 315, 400

Parts and characteristics

  • Perforated square diffuser face
  • Circular duct collar for connection to a vertical duct

Construction features

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

DCS-P-*-AK +AKV-...ZH

Variant

  • Ceiling swirl diffuser with perforated square diffuser face and plain perimeter border and central screw fixing
  • With plenum box for horizontal duct connection

Nominal sizes

  • Diffuser face: 600
  • Swirl diffuser: 125, 160, 200, 250, 315, 400

Parts and characteristics

  • Perforated square diffuser face
  • Plenum box for horizontal duct connection
  • Plenum box with lining, optional

Construction features

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


DCS-P-...-AKV-*RA

Variant

  • Perforated square diffuser face to match Type DCS supply diffuser with plain perimeter border and central screw fixing 
  • With return air baffle for extract applications

Nominal sizes

  • Diffuser face: 600
  • Return air baffle: 600

Parts and characteristics

  • Perforated square diffuser face
  • Return air baffle for extract applications
  • Return air baffle with lining, optional



DCS-P-*-K

Nominal size
Q
□Q1
mm
QL
□Q1
mm
QS15/QM15
□Q1
mm
QS26/QM26
□Q1
mm

QB
□Q1
mm

H1
mm
ØD
mm
m
kg
... × 125 598 595 58457359977 123 2.2
... × 160 598 595 58457359977 158 2.4
... × 200 598 595 58457359977 198 2.5
... × 250 598 595 58457359977 248 2.8
... × 315 598 595 58457359987 313 3.4
... × 400 598 595 58457359987 398 3.9


DCS-P-...-AK +AKV-...ZH

Nominal size
Q
□Q1
mm
QL
□Q1
mm
QS15/QM15
□Q1
mm
QS26/QM26
□Q1
mm
QB
□Q1
mm
H3
mm
□Q3
mm
ØD4
mm
E
mm
ØD
mm
A
mm
C
mm
m
kg
... × 125 598 595 584573599 284216 123 89 98 204 40/*754.3
... × 160 598 595 584573599309 266 158 89 123 216 40/*755.4
... × 200 598 595 584573599344 290 198 89 158 234 40/*756.0
... × 250 598 595 584573599 384477 248 89 198 254 40/*7510.1
... × 315 598 595 584573599444567 313 89 248 289 40/*7513.3
... × 400 598 595 593 573599509615 398 89 313 321 40/*75 15.9


DCS-P-...-RA +AKV-...RA

Nominal size
Q
□Q1
mm
QL
□Q1
mm
QS15/QM15
□Q1
mm
QS26/QM26
□Q1
mm
H3
mm

Q3
mm
QB
□Q1
mm
H3
mm
Q3
mm
m
kg
... × 600598595584573855655991125505.2

Installation details, Basic information and nomenclature

  • Installation details
  • BASIC INFORMATION AND NOMENCLATURE

Installation and commissioning

  • Preferably for rooms with a clear height up to 4.0 m
  • Flush ceiling installation
  • Horizontal or vertical duct connection

Installation information

  • Flush ceiling installation
  • Installation and making connections to be performed by others

These are only schematic diagrams to illustrate installation details.

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

Nomenclature

LWA [dB(A)]

A-weighted sound power level of air-regenerated noise

V [m³/h] and [l/s]

Volume flow rate

Δtz [K]

Supply air to room air temperature difference, i.e. supply air temperature minus room temperature

Δpt [Pa]

Total differential pressure

Aeff [m²]

Effective air discharge area


All sound power levels are based on 1 pW.

Downloads

product information

operation manuals

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Contact

Thank you for your message!

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.: +44 (0)1842 754545 | Fax: +44 (0)1842 763051