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Halton Jaz JMC – Nozzle diffuser

Halton Jaz JMC is a square diffuser with a circular nozzle area that supplies air in a swirl pattern.
The adjustable nozzle pattern makes the diffuser flexible for various use cases and the throw pattern easy to adjust.
The product is suitable for installation in e.g. office and hospital rooms, educational facilities and public spaces. 

  • Swirl function with adjustable nozzles
  • Adjusting and measuring with balancing plenum Halton Pop PDI

The Halton Jaz diffuser family is designed in accordance with the core values of Halton to meet the following requirements:

  • Sustainable production with reduced waste and production close to markets
  • Excellent performance in terms of airflow range and flexibility
  • Comfortable indoor environmental conditions through silent operation
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Overview

Halton Jaz JMC is a square diffuser with a circular nozzle area that supplies air in a swirl pattern. The adjustable nozzle pattern makes the diffuser flexible for various use cases and the throw pattern easy to adjust.

Application area

  • Ventilation in offices, hospital rooms, schools, and public spaces.

Key features

  • Swirl function with adjustable nozzles
  • Silent function also with large airflows
  • Adjusting and measuring with balancing plenum Halton Pop PDI

Operating princple


Fig. 1. Operating principle of Halton Jaz JMC

Air is supplied into the space through nozzles of the front panel. Two-channel design of the nozzles allows silent operation and high induction rate.

The throw pattern of the diffuser can be adjusted by turning nozzles to desired direction. By default, each nozzle is oriented tangentially to the circular shape, which leads to swirl function of the throw pattern. Custom patterns are also possible thanks to the individually adjustable nozzles. Direction of the supply air jet has no effect on the noise level, pressure drop or airflow rate.

The recommended maximum temperature difference between supply and room air is 10 °C.

Key technical data

Feature Description
Airflow rate Max. airflow rate 153 l/s or 550 m3/h, <35 dB
Dimensions 595 x 595 mm
Weight 4 – 4.4 kg
Adjustability Individually adjustable nozzles

Features and options

Catergory Feature
(order code)
Option
(order code)
Description
Diffuser Duct connection size
(D)
125, 160, 200, 250 or 315 Five nominal duct connections sizes. Units are in millimetres.
Diffuser size
(A)
600 595x595x70 mm. Available with all duct connection sizes.
Balancing plenum PDI
(subproduct*)
Model
(M)
S With supply airflow adjustment and measurement module MSM
E With exhaust airflow adjustment module MEM
N Without airflow adjustment module
Sizes D Plenum’s duct connection size. It can be either the same or one size bigger than diffusers duct connection.
E Diffuser connection size. Must be the same size than diffusers duct connection size.
Sound attenuation material (AT) P With polyester attenuation material
W With mineral wool attenuation material
NA Without attenuation material

* Orderd separately

Quick selection

Values with adjustment module (MSM) fully open.


Fig. 2. Quick selection with unit l/s


Fig. 3. Quick selection with unit m3/h

Structure and materials

No. Part Description Note
1 Front panel Polyester-painted steel, white (RAL 9003) Special colours available
2 Nozzles Plastic, polyacetal (POM) Colour alternatives:
white, black and grey
3 Front panel springs Stainless steel
4 Duct seal gasket Polymer
5 Spigot Galvanised steel
6 Casing Polyester-painted steel, white (RAL 9003) Special colours available

Dimensions and weight

Fig.4. Dimensions of Halton Jaz JMC diffuser

JMC ØD [mm] Number of nozzles Weight [kg]
125-600 124 19 4.4
160-600 159 37 4.3
200-600 199 37 4.3
250-600 249 61 4.1
315-600 314 61 4.0

Halton Jaz JMC with Halton Pop PDI plenum

Fig. 5. Dimensions of Halton Jaz JMC with Halton Pop PDI plenum, externally positioned connection spigot

Fig. 6. Dimensions of Halton Jaz JMC with Halton Pop PDI plenum, internally positioned connection spigot

JMC PDI ØD
[mm]
ØD1
[mm]
L
[mm]
W1
[mm]
H
[mm]
L1
[mm]
Weight
[kg]
125-600 100-125 99 127 308 282 172 168 4.7
125-125 124 127 308 282 172 168 4.8
160-600 125-160 124 162 308 282 172 168 7.1
160-160 159 162 458 358 239 280 9.4
200-600 160-200 159 202 458 358 239 280 8.9
200-200 199 202 458 358 239 280 9.0
250-600 200-250 199 252 458 358 239 280 9.0
250-250 249 252 520 480 359 280 12.3
315-600 250-315 249 317 520 480 359 280 12.2
315-315 314 317 520 480 359 280 12.4

Specification

Square nozzle diffuser with circular pattern for false ceiling installation, fulfilling the following requirements:

Structure

  • Front panel openable and removable to allow general maintenance and cleaning.
  • Front panel removable without special tools.
  • Round nozzle pattern with swirl air distribution.
  • Individually adjustable nozzles to change air distribution upon need.
  • Two-slot nozzle design to ensure efficient air mixing and silent operation.
  • Unit width 595 mm, height 70 mm.
  • Inlet duct diameter 125, 160, 200, 250 or 315 mm.

Materials

  • Casing and front panel manufactured from steel.
  • Casing and front panel white, powder painted in RAL 9003, 30 % gloss.
  • Connection spigot manufactured from galvanized steel.
  • Connection spigot equipped with fixed gasket.

Model with balancing plenum

  • Diffuser to be connected with a galvanised steel plenum Halton Pop PDI.
  • Plenum has integrated gasket to ensure airtight duct connection.
  • Plenum has a removable adjustment module MSM for supply or MEM for exhaust.

Packaging and identification

  • The product is protected by removable plastic coating.
  • The product is packed in a cardboard box.
  • The product is identified by labels attached both to the product and the cardboard box.

Installation


Fig. 7. Halton Jaz JMC diffuser connected to a Halton Pop PDI plenum

The diffuser is available in size 595×595 mm for direct installation to the modular T-bar ceiling (600×600) either above or below the list.

The diffuser is connected usually to balancing plenum Halton Pop PDI (Fig. 7). Alternatively, it can be connected direct to the duct by riveting or screwing. In that case, minimum safety distance to the next T-branch or curve is three times the duct diameter (3xD).

Commissioning


Fig. 8. Adjustment of airflow of diffuser and plenum combination.

Airflow control

The diffuser itself has no airflow adjustment. To adjust and measure the supply airflow rate, the diffuser shall be combined with Halton Pop PDI balancing plenum with measurement and adjustment module MSM. In case of exhaust air, use of adjustment module MEM is recommended. It is not possible to measure exhaust airflow rate with adjustment module MEM.

Open the front plate and pass the tubes and control spindle through the front panel (Fig. 8). Replace the front panel. Measure the differential pressure with a manometer. The flow rate is calculated using the formula below:

where

  • qv           Airflow rate [l/s] or [m3/h]
  • ∆pm      Measured pressure [Pa]
  • k            The k factor (see the table below)

Adjust the airflow rate by rotating the control spindle until the desired airflow rate (pressure difference) is achieved.

Set the tubes and spindle back into the plenum. Damper position can be locked with a knurled head screw of the adjuster.

Duct connection (PDI) k  factor for MSM adjuster, opening > 0, [l/s]
> 8D Min. 3D
100 5.7 7.5
125 9.6 12.6
160 16.4 21.9
200 26.3 31.0
250 47.1 51.5
315 78.8

 

Duct connection (PDI) k  factor for MSM adjuster, opening > 0, [m3/h]
> 8D Min. 3D
100 20.6 27.0
125 34.4 45.4
160 59.0 78.8
200 94.8 111.6
250 169.5 185.4
315 283.6

Maintenance

Detach the front panel of the diffuser and let it balance on the hinges. If needed, each nozzle can be easily removed by pressing the stoppers and then pushing the nozzle through the front panel. Wipe the diffuser casing, nozzles and front panel with damp cloth.

The nozzles are replaced into the front panel by pushing. After cleaning reattach the front panel.

Option with balancing plenum

Remove the measurement and adjustment module by gently pulling from the shaft; not from the control spindle or measurement tubes.

Wipe the components with damp cloth instead of immersing in water. Wipe also the inner part of the plenum; detach the attenuation material if needed.

Reassemble the module by pushing the shaft until the unit meets the stopper.

After cleaning reattach the front panel.

Order code

JMC/D-A, CO-ZT

Main options
D = Diffuser duct connection size [mm] 125, 160, 200, 250, 315
A = Diffuser size [mm] 600
Other options and accessories
C = Colour
SW Signal white (RAL 9003)
X Special colour (RAL xxxx)
ZT = Taylored product
N No
Y Yes (ETO)
Sub products and accessories
(ordered separately)
Halton Pop PDI Balancing plenum

Order code example

JMC-200-600; CO=SW, ZT=N

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