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RWR-N (RAL9005) • Black circular swirl diffusers with fixed blades

Circular swirl ceiling diffusers with fixed blades

Brand

  • Cairox

Application

  • For air supply and exhaust in ventilation and air conditioning systems.

Material

  • Steel

Colour

  • Standard colour black, RAL 9005
  • Other colours available upon request

Composition

  • Fixed blades

Mounting

  • Fixing with central screw into the crossbar of the plenum box

Accessories

  • Plenum box, type RER-LB
  • Insulated plenum box, type RER-LB ISO
  • Regulating valve for plenum box, type CRC
  • Mounting crossbar for direct duct mounting, type FGN
  • Mounting crossbar for direct ceiling mounting, type FHN

Text for tender

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  • The air supply diffusers are of the swirl type with fixed blades. They are made of steel with white powder coating RAL 9005 and supplied with a volume control damper in the plenum box.
  • Cairox type RWR-N RAL9005+RER-L

Order example

  • RWR-N RAL9005, 315 + RER-LB + CRC 250

Explanation

RWR-N RAL9005 = Diffuser type

315 = Diffuser size (Ø diffuser neck connection)

Accessories

RER-LB = Plenum box

CRC = Regulating valve for plenum box
250 = Plenum box connection diameter

Dimensions

RWR-N

ØD1 [mm]

ØD2 [mm]

#Blades

160

158

214

10
200

198

264

12

250

248

326

14

315

313

404

16

Quick selection

RWR-N160200250315
QAk0.01230.01760.02260.033
B1.22.43.61.22.43.61.22.43.61.22.43.6
100 H=2.70.140.10.080.110.080.06      
VzH=3.20.10.080.060.090.070.05      
 H=3.80.080.060.050.070.050.05      
Vk2.31.6  
X0.250.80.7  
Ps196  
Lw(A)26<20  
150 H=2.70.210.150.110.170.120.10.150.110.08   
VzH=3.20.150.120.10.130.10.080.110.090.07   
 H=3.80.120.10.080.10.080.070.090.070.06   
Vk3.42.41.8 
X0.251.210.9 
Ps41145 
Lw(A)3824<20 
200 H=2.70.270.20.150.230.160.130.20.140.110.170.120.09
VzH=3.20.210.160.130.170.130.110.150.120.090.130.10.08
 H=3.80.160.130.110.130.110.090.120.090.080.10.080.07
Vk4.53.22.51.7
X0.251.61.41.21
Ps722593
Lw(A)463222<20
300 H=2.7   0.340.250.190.30.220.170.250.180.14
VzH=3.2   0.260.20.160.230.170.140.190.140.12
 H=3.8   0.20.160.140.170.140.120.140.120.1
Vk 4.73.72.5
X0.25 2.11.81.5
Ps 54206
Lw(A) 4333<20
400 H=2.7      0.40.290.220.330.240.19
VzH=3.2      0.30.230.190.250.190.16
 H=3.8      0.230.190.160.190.160.13
Vk  4.93.4
X0.25  2.42
Ps  3512
Lw(A)  4127
500 H=2.7         0.420.30.23
VzH=3.2         0.310.240.2
 H=3.8         0.240.20.16
Vk   4.2
X0.25   2.5
Ps   18
Lw(A)   33
600 H=2.7         0.50.360.28
VzH=3.2         0.380.290.24
 H=3.8         0.290.240.2
Vk   5.1
X0.25   3
Ps   26
Lw(A)   38

Symbols and specifications

  • Q = Air volume in m³/h
  • Ak = Effective surface (free area) in m²
  • B = Distance between the diffusers in m
  • H = Installation height of the diffusers in m
  • Vz = Maximum velocity at the occupied zone according to distance between the diffusers and installation height in m/s
  • Vk = Average effective velocity through the diffuser in m/s
  • X0.25 = Throw length in m at an end velocity Vt of 0,25m/s
  • Ps = Static pressure loss given in Pa
  • Lw(A) = Acoustic power in dB(A)


  • The throw X0.25 is given at an end velocity of 0.25m/s for a smooth ceiling without any obstacles.
  • The values are given for isothermal supply air. Throw distances for cooling conditions at -11K can be calculated by dividing the X0.25 values with factor 1.1. For heating purposes at Dt of +11K a multiplier of 1.1 should be applied to the given X0.25 value.
  • In order to achieve a high comfort level, selections can be made according to the maximal velocity at the occupied zone Vz. These values are given at distances between diffusers B and installation heights H. Velocities Vz lower than, or equal to 0,25m/s at the occupied zone are advised.
  • The pressure losses Ps are given for diffusers without damper of with fully opened damper.
  • The acoustic power values Lw(A) are given for diffusers without damper of with fully opened damper without room attenuation. Acoustic powers below 20dB(A) are mentioned as "<20" in the tables.
  • For all special requirements, please contact our engineering office.

Placement instruction

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