Overview

• Suitable for horisontal supply and exhaust
• Openable cone module enables cleaning of the diffuser and ductwork.
• All sizes adapted for installation in modular 600×600 mm suspended ceiling
• Lightweight aluminum material

Accessories

• Airflow adjustment damper
• Plenum options with measurement and adjustment functions
• Measurement and adjustment module

Quick selection

Dimensions

Material

Accessories

Product Models

All standard sizes are available also with 1, 2 or 3 supply directions (DFC).

Function

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.

Installation

Code description
1.  Plenum
2.  Spigot
3.  Clips
4.  DFB or DFC plenum

Plenum installation

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.

Diffuser installation

The diffuser is attached to the plenum via clips.

Dimensions of installation hole

Adjustment

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):

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 diffuser is installed.

Servicing

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.

Option: With balancing plenum Halton PDF + MSM

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.

Specification

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.

Order Code

DFB/S-A-B; FI-CO-ZT

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

Other options and Accessories

FI  = Finishing
PN     Painted

CO = Colour
SW      White (RAL 9003)
X        Special colour

ZT  = Tailored product
N        No
Y       Yes (ETO)

Sub products

PDF   Plenum for DFB and DFC

Code example

DFB/A-6-6, FI=PN, CO=SW, ZT=N