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Product / AWU

Halton AWU – Universal grille

Horizontal air supply, suitable also for exhaust. 

  • Fixed front vanes, stable throw pattern with no vertical deflection
  • Adjustable rear vanes for horizontal deflection of the air jet

Link to Revit model (MagiCAD Cloud)

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  • Horizontal air supply from wall, suitable also for exhaust
  • Fixed front vanes, stable throw pattern with no vertical deflection
  • Adjustable rear vanes for horizontal deflection of the air jet
  • Aluminium construction with elegant outlook
  • Detachable grille enables cleaning of the grille and ductwork
  • Continuous grilles available with modular construction


  • Airflow adjustment damper
  • Plenum options with measurement and adjustment functions
  • Installation frame


LxH L1 L2 H1 H2
 200×50 212 176 62 26
200×100 212 176 112 76
300×100 312 276 112 76
400×100 412 376 112 76
500×100 512 476 112 76
600×100 612 576 112 76
800×100 812 776 112 76
1000×100 1012 976 112 76
600×150 612 576 162 126
800×150 812 776 162 126
1000×150 1012 976 162 126
1200×150 1212 1176 162 126
1500×150 1512 1476 162 126
600×200 612 576 212 176
800×200 812 776 212 176
1000×200 1012 976 212 176
1200×200 1212 1176 212 176
1500×200 1512 1476 212 176

With flow control damper OD total depth is 48 mm + 45 mm.

Special dimensions

In addition to standard sizes, other dimensions are available by special order. The maximum size is 1500 mm x 500 mm (LxH).
A modular construction is possible where the installation length is greater than 1500 mm. The maximum total length is 20 m.


Part Material Finishing Note
Frame Aluminium Polyester-painted as
white (RAL 9003 / 30% gloss),
anodised or mill finished
Special colours
Vanes Aluminium Polyester-painted as
white (RAL 9003 / 30% gloss),
anodised or mill finished
Special colours
Installation frame Galvanised steel
Plenum box/spigot Galvanised steel


 Accessory Code  Description
Balancing plenum PRL For balancing and equalising the airflow
and attenuating the duct noise
Plenum BDR Plenum for duct connection
(with or without attenuation material)
Airflow measurement and
adjustment unit
MSM  For supply installation
Sound attenuation IN Mineral wool for the BDR plenum box.
Polyester fiber or mineral wool
for the PRL plenum box.
Flow adjustment damper OD Aluminium opposite blade damper
for airflow adjustment
Installation frame IF For installation without plenum
Concealed screw
CC For installation with BDR plenum
or IF/AWU frame


Supply air is supplied without vertical deflection and with horizontal deflection (rear vanes) through the vanes into the space, mixing with room air in front of the grille.
The flow pattern is adjusted by changing the angle of the adjustable rear vanes.
Wall installation for horizontal supply or ceiling installation for vertical supply.
The grille can also be used as an exhaust unit.


The dimensions of the installation hole are LxH when installation frame is used, and (L-5)x(H-5) without installation frame.

The grille is connected to the circular duct using either a Halton PRL balancing plenum or a Halton BDR plenum or alternatively directly to the rectangular duct using the IF/AWU installation frame.

Installation frame, IF/AWU     Balancing plenum, PRL            Plenum, BDR

Clips fastening (standard)

The grilles are delivered with clips fastening as standard.
The clips fastening is used with Halton PRL, Halton BDR and IF/AWU.

Concealed screw fastening

Concealed screw fastening is possible when the grille is installed with an installation frame (IF/AWU) or with a Halton BDR plenum; not with a Halton PRL balancing plenum. Holes for screws are provided in Halton BDR.

For ceiling installation concealed screw fastening is recommended.

Visible screw fastening is not possible due to the reduced width of the frame (18 mm).


In order to enable airflow adjustment and measurement of airflow rate it is recommended to connect the grille to the Halton BDR plenum or Halton PRL balancing plenum equipped with the MSM/MEM module.
The supply flow rate is determined by using the measurement and adjustment module MSM and the exhaust flow rate, by measuring the static pressure of the plenum.
Detach the grille and pass the tubes and control spindle through the grille.
Measure the differential pressure with a manometer. The flow rate is calculated using the formula below.

Adjust the airflow rate by rotating the control spindle until the desired setting is achieved.
Lock the damper position with a screw.
Replace the tubes and spindle into the plenum and replace the grille.

The k-factor for installations with different safety distances.

BDR >6xD min 3xD
100 6 7
125 10 12
160 19 22
200 28 32
250 49 51
315 77 83

Airflow adjustment damper OD

The airflow rate is adjusted by turning the damper blades behind the grille with a screwdriver. The measurement is carried out when grille is installed.


Remove the grille by gently drawing it out by the frame. Use a screwdriver if necessary.
Clean the parts by wiping them with a damp cloth.
Push the grille back into place so that the clips lock (or fix by screwing on the concealed screws).

With balancing plenum Halton PRL or Halton BDR + MSM/MEM

Remove the measurement and adjustment module by gently pulling the shaft (NB. not the control spindle or measurement tubes!).
Wipe the parts with a damp cloth, instead of immersing in water.
Remount the measurement and adjustment module by pushing in the shaft until the module meets the stopper.
Push the grille back into place so that the clips lock.


The grille has horizontal fixed vanes and vertical adjustable rear vanes, and an 18 mm wide flat frame, anodised or epoxy-painted with a white (RAL 9003) colour.
Flow pattern can be adjustable by rear vanes.

Alternative 1

The grille can be connected to the ductwork using a plenum, with mineral wool as sound attenuation material.

Alternative 2

The grille can be connected to the ductwork using a balancing plenum, which comprises sound attenuation material of polyester fibre with a washable surface or mineral wool. The plenum has an airflow measurement and adjustment unit.

The grille is removable, in order to provide access to the measurement and adjustment module in the plenum.

Order Code


L = Length (mm)
200, +1, .., 20000

H = Height (mm)
50, +1, .., 500

Other options and accessories

FS  = Fastening
CL         Clips
CC         Concealed screw fastening

FI  = Finishing
AN         Anodised
MF         Mill finished
PN         Painted

CO = Colour
SW       Signal white (RAL 9003)
X           Special colour (RAL xxxx)
N          No painting

ZT = Tailored product
N          No
Y          Yes (ETO)

Sub Products

BDR    Plenum
PRL     Plenum
IF         Installation frame (Grilles)
OD      Opposed blade damper (Grilles)

Code example

AWU-200-50, FS=CL, FI=AN, CO=N, ZT=N


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