Easy to clean and maintain.
NS | W | W1 |
6×6 | 295 | 150 |
9×9 | 370 | 225 |
12×12 | 445 | 300 |
15×15 | 520 | 375 |
18×18 | 595 | 450 |
21×21 | 670 | 525 |
24×24 | 745 | 600 |
NS | W | W1 | H | ØD |
6×6 | 295 | 150 | 225 | 124 |
9×9 | 370 | 225 | 310 | 199 |
12×12 | 445 | 300 | 350 | 249 |
15×15 | 520 | 375 | 415 | 314 |
18×18 | 595 | 450 | 500 | 399 |
21×21 | 670 | 525 | 550 | 449 |
24×24 | 745 | 600 | 600 | 499 |
Part | Material | Finishing | Note |
Frame | Aluminium | Polyester-painted, White (RAL 9003 / 30% gloss) |
Special colours available |
Central cone | Aluminium | Polyester-painted, White (RAL 9003 / 30% gloss) |
Special colours available |
Accessory | Code | Description |
Plenum | PDF/H | Plenum for horizontal duct connection (with or without insulation) |
Plenum | PDF/V | Plenum for vertical duct connection (with or without insulation) |
Airflow measurement and adjustment module |
MSM | For supply installation |
Sound attenuation | IN | Mineral wool in the plenum |
Flow adjustment damper | ODD | Aluminium opposite blade damper for flow adjustment |
All standard sizes are available also with 1, 2 or 3 supply directions (DFC).
Air is supplied horisontally into the space through the slots in the conical front panel.
Supply air mixes with room air in the vicinity of the diffuser.
The fixed cones of the diffuser are designed to ensure that the supply air flows along the ceiling.
The Halton DFB diffuser can also be used as an exhaust unit.
Code description
1. Plenum
2. Spigot
3. Clips
4. DFB or DFC plenum
The plenum is installed into the suspended ceiling with M8 drop rods (not supplied in the delivery) and connected to the ductwork with a spigot.
When equipped with a measurement and adjustment module, the recommended safety distance upstream of the device is at least 3xD, in order to ensure a reliable airflow rate measurement.
The units control spindle must not be excessively bent.
The diffuser is attached to the plenum via clips.
NS | H (mm) | L (mm) |
6×6 | 215 | 215 |
9×9 | 290 | 290 |
12×12 | 365 | 365 |
15×15 | 440 | 440 |
18×18 | 515 | 515 |
21×21 | 590 | 590 |
24×24 | 665 | 665 |
To aid in adjusting and measuring the air flow rate, it is recommended that the diffuser is connected to a plenum equipped with a MSM.
The supply airflow is determined by measuring the pressure difference with a measurement module.
Measure the differential pressure with a manometer.
The airflow rate is calculated according to the following formula:
where:
∆Pm is the measured pressure (Pa)
k is a factor given as a function of mounting and diameter
Qv is the airflow rate
The k factor for installations with different safety distances (distance of other items from the MSM):
Safety distance | ||
Spigot Diameter | > 6xD | min. 3xD |
100 | 6 | 7 |
125 | 10 | 12 |
160 | 19 | 22 |
200 | 28 | 32 |
250 | 49 | 51 |
315 | 78 | – |
The airflow rate is adjusted by turning the damper blades behind the grille with a screwdriver. The measurement is carried out when diffuser is installed.
Remove the central cones by gently drawing out the central part.
Clean the parts by wiping them with a damp cloth.
Push the central cones back into place so that the springs lock.
Remove the measurement and adjustment module by gently pulling the shaft (not the control spindle).
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 central cones back into place so that the springs lock.
The diffuser is made of extruded aluminium, polyester-painted to white (RAL 9003) colour.
The bevel angles of the outer frame and central cone are welded so that the joints are almost invisible.
The diffuser is connected to the ductwork using a plenum with mineral wool as sound attenuation material.
The plenum is equipped with an airflow measurement and adjustment module.
The central cones of the diffuser sre detachable to provide access to the measurement and adjustment module in the plenum.
S = Model
A Standard
B Suspended ceiling installation 600×600
C Suspended ceiling installation 675×675
A = Size of connection
S=A: 6, 9, 12, 15, 18, 21, 24
S=B: 6, 9, 12, 15
S=C: 6, 9, 12, 15, 18
B = Height of connection
A=6: 6
A=9: 9
A=12: 12
A=15: 15
A=18: 18
A=21: 21
A=24: 24
FI = Finishing
PN Painted
CO = Colour
SW White (RAL 9003)
X Special colour
ZT = Tailored product
N No
Y Yes (ETO)
PDF Plenum for DFB and DFC
DFB/A-6-6, FI=PN, CO=SW, ZT=N