PRODUCTS
EShop-number
Password
Welcome to Cairox Bulgaria

APW-4 (RAL9016) • 4-way ceiling diffusers with fixed core

  • 4-way pattern diffusers
  • Square
  • Alumínium
  • White, RAL 9016
  • Fixed Innercore

4-way ceiling diffusers with fixed core and central screw mounting.

Brand

  • Cairox

Application

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

Material

  • Aluminium

Colour

  • Standard colour white, RAL 9016

Composition

  • Frame and fixed inner core made of aluminium
  • Fixed 4-way directional blades

Mounting

  • Fixing by central screw in the crossbar of the plenum box.

Accessories

  • Opposite blade volume control damper type DSF
  • Plenum box with side duct connection type REF
  • Insulated plenum box with side duct connection type REF ISO
  • Plenum box regulating valve CRC

Text for tender

Copy
  • The air supply ceiling diffusers are square with a fixed 4-way pattern with a fixed core. They are made of aluminium and steel in white powder coating RAL 9016 and are supplied with a volume control damper and a plenum box with a crossbar.
  • Cairox type APW-4 (9016)+DSF+REF

Order example

  • APW-4 (9016), 444 + REF + DSF

Explanation

APW-4 = Diffuser type

444 = Diffuser size

Accessories (Optional)

REF = Plenum box

DSF = Volume control damper

Dimensions

 L x H [mm]
APW-4 294/150145 x 145
APW-4 369/225220 x 220
APW-4 444/300295 x 295
APW-4 519/375370 x 370
APW-4 595/445445 x 445

Selection

Qv 294369444519595
LXH150x150225x225300x300375x375450x450
Aeff0.010.020.040.070.10
100Lth0.50    
Ps4.50    
veff2.50    
Lw18    
160Lth0.800.50   
Ps122.30   
veff4.101.80   
Lw2913   
200Lth10.700.50  
Ps183.601.10  
veff5.102.301.30  
Lw35186  
300Lth1.5010.700.60 
Ps418.202.601.10 
veff7.603.401.901.20 
Lw4528167 
400Lth 1.3010.800.70
Ps 144.601.900.90
veff 4.602.601.601.10
Lw 3524157
500Lth 1.701.2010.80
Ps 237.102.901.40
veff 5.703.2021.40
Lw 41292013
600Lth  1.501.201
Ps  104.202
veff  3.802.501.70
Lw  342517
800Lth  21.601.30
Ps  187.503.60
veff  5.103.302.30
Lw  413224
1000Lth   21.70
Ps   125.60
veff   4.102.80
Lw   3730
1200Lth   2.402
Ps   178.10
veff   4.903.40
Lw   4234
1400Lth   2.802.30
Ps   2311
veff   5.704
Lw   4638
1600Lth    2.70
Ps    14
veff    4.50
Lw    41
2000Lth    3
Ps    18
veff    5.10
Lw    44

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
  • µPs = Static pressure loss given in P
  • 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
CopyrightEthics policyDisclaimerDuct calculator

Requesting information. Please wait a moment...