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Halton Jaz JRC – Perforated diffuser

Halton Jaz JRC is a perforated diffuser with a combination of excellent indoor climate conditions and iconic design.
It is available for both supply and exhaust installation, which enables a unified ceiling design.
The product is suitable for installation in e.g. office and hospital rooms, educational facilities and public spaces

  • Silent function also with large airflows
  • 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 JRC is a perforated diffuser with the combination of excellent indoor climate conditions and iconic design. It is available for both supply and exhaust installation, which enables a unified ceiling design.

Application area

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

Key features

  • Perforated
  • Suitable for air supply and exhaust
  • Silent function also with large airflows
  • Adjusting and measuring with balancing plenum Halton Pop PDI
  • Ceiling adapters available for different ceiling types

Operating principle


Fig.1. Operating principle od Halton Jaz JRC, supply

Air is supplied into the space through the perforated front panel of the diffuser. There is a deflector disc in the middle of the front panel, which turns the air vertically parallel to the ceiling, so that Coanda-effect would work.

The supply air pattern is 4-directional. However, the pattern can be directed to 3, 2 or 1 ways by using with separate deflector parts (DP, delivered as accessory, see section Installation).

The recommended maximum temperature difference between supply and room air as follows:

  • 8 °C for 4- and 3 –way air supply direction
  • 6 °C for 2- and 1–way air supply direction

Diffuser can also be used as an exhaust unit by removing the deflector disc from the middle of the front panel (Fig. 2).


Fig.2. Operating principle od Halton Jaz JRC, exhaust

Key technical data

Feature Description
Airflow rate Max. airflow rate 183 l/s or 660 m3/h, <35 dB
Dimensions 595 x 595 mm or 420×420 mm
Weight 2.1 – 4.3 kg
Adjustability Throw pattern adjustable with deflector parts (DP)

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)
420 420x420x50 mm. Available with duct connection sizes 125, 160 or 200.
600 595x595x70 mm. Available with duct connection sizes 200, 250 and 315
Deflector part DP
(accessory*)
Diffuser size 420, 600 Set of panels for directing the airflow
(R3, R2, or R1).
Select correct diffuser size.
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
Ceiling adapter CA for 420×420 diffusers
(accessory*)
Model (M) S1 Standard 595×595 mm
Ecophon Focus A, Rockfon A
H1 Hidden grid
Ecophon Focus DS, Rockfon X
P1 Partly hidden grid
Ecophon Focus Dg, Rockfon X
C1 Clip-in
Dampa clip-in, square edge
R1 Recessed
Ecophon Focus F, Rockfon E, T24

* Ordered separately

Quick selection

Values with adjustment module (MSM) fully open.


Fig. 3. Quick selection with unit l/s  

Fig. 4. 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 Front panel springs Stainless steel
3 Deflector disc Pre-painted steel (black)
4 Spring Stainless steel
5 Duct seal gasket Polymer
6 Spigot Galvanised steel
7 Casing Polyester-painted steel, white (RAL 9003) Special colours available

Dimensions and weight

Fig. 5. Dimensions of Halton Jaz JRC diffuser, 600×600 mm (left) and 420×420 mm (right)

JRC ØD [mm] Weight [kg]
125-420 124 2.1
160-420 159 2.2
200-420 199 2.3
200-600 199 4.1
250-600 249 4.2
315-600 314 4.3

Halton Jaz JRC with Halton Pop PDI plenum

Fig. 6. Halton Jaz JRC with Halton Pop PDI plenum, externally positioned connection spigot

Fig. 7. Halton Jaz JRC with Halton Pop PDI plenum, internally positioned connection spigot

JRC W
[mm]
PDI ØD
[mm]
ØD1
[mm]
L
[mm]
W1
[mm]
H
[mm]
H1
[mm]
L1
[mm]
Weight
[kg]
125-420 420 100-125 99 127 308 282 172 50 168 4.8
420 125-125 124 127 308 282 172 50 168 4.9
160-420 420 125-160 124 162 308 282 172 50 168 4.9
420 160-160 159 162 458 359 239 50 280 7.2
200-420 420 160-200 159 202 458 359 239 50 280 7.2
420 200-200 199 202 458 359 239 50 280 7.3
200-600 595 160-200 159 202 458 359 239 70 280 9.0
595 200-200 199 202 458 359 239 70 280 9.1
250-600 595 200-250 199 25 458 359 239 70 280 9.1
595 250-250 249 252 520 480 359 70 280 12.4
315-600 595 250-315 249 317 520 480 480 70 280 12.3
595 315-315 314 317 520 480 480 70 280 12.5

Specification

Square perforated diffuser for supply or exhaust air 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.
  • Four directional air distribution.
  • Adjustable air throw pattern with separate deflection panel set (DP)
  • Unit sizes:
    o 595×595 mm, height 70 mm
    o 420×420 mm, height 50 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. 8. Halton Jaz JRC 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 usually connected to the balancing plenum Halton Pop PDI (see Fig. 6). Alternatively, it can be connected directly 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’s diameter (3xØD).

Adaptations for different ceiling types can be made with size 420×420 mm and a separate ceiling adapter (CA,
to be ordered as an accessory, see Fig. 9). See the section Download for more information about the ceiling
adapters.


Fig. 9. Halton Jaz JRC, 420 with 595×595 mm ceiling adapter (CA)

Throw pattern can be adjusted by using separate deflection panel package DP. In Fig. 10., the possible directions are shown.


Fig. 10. Deflection part options

Code description
R4        Radial jet, 4 direction
R3        Radial jet, 3 direction
R2        Radial jet, 2 direction
R1        Radial jet, 1 direction
E          Exhaust

Commissioning


Fig. 11. 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. 11.). 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 given as a function of mounting and diameter (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 of 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 of 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.

Wipe the diffuser casing and front panel with damp cloth. Ensure that the deflector panels are directed as requested. 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

JRC-D-A, CO-ZT

Main options
D = Diffuser duct connection size [mm] 125, 160, 200, 250, 315
A = Diffuser size [mm] 420, 600
Other options and accessories
C = Colour
SW Signal white (RAL 9003)
X Special colour (RAL xxxx)
ZT = Tailored product
N No
Y Yes (ETO)
Sub products and accessories (ordered separately)
Halton Pop PDI Balancing plenum
CA Ceiling adapter for different ceiling types, for size JRC-420
DP Set of deflection parts

Order code example

JRC-125-420, CO=SW, ZT=N

Downloads

  • Halton Jaz JRC – Perforated diffuser

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  • Halton Jaz JRC – Rei’itetty hajottaja

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  • Halton Jaz JRC – Perforerad spridare

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  • Halton Jaz JRC – Fiche technique

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  • Halton Jaz JRC – Technical description

    Data

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  • Installation instruction – Halton Jaz JMC, JSC, JRC, JWC – Universal

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  • Halton Supply Air Diffusers brochure

    Data

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  • Halton ceiling adapters for Halton Jaz JRC and JSC diffusers

    Data

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  • Halton tuloilmahajottajat – esite

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  • Halton Kattosovittimet Halton Jaz JSC/JRC -hajottajille

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  • Halton Tilluftsspridare broschyr

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  • Undertaksadaptrar för Halton Jaz JSC och JRC

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