NEW! Halton Jaz JLN – Linear nozzle diffuser

The Halton Jaz JLN linear nozzle diffuser features a removable front plate and a dedicated balancing plenum for precise, flexible supply air distribution. It delivers targeted airflow, helping maintain indoor comfort and air quality. The diffuser allows horizontal or vertical air discharge. It can be mounted on ceilings or walls. Individual units may be installed as standalone modules or in continuous rows.

The system manages airflow accurately and reduces noise levels. Its energy-efficient design has optimised nozzle geometry and low pressure drop. This design reduces fan power demand and lowers the carbon footprint, supporting sustainability.

The diffuser supplies air into the occupied zone through its front panel, enabling both horizontal and vertical discharge. Each nozzle is manually adjustable, enabling one-, two-, three-, or four-way radial airflow patterns to suit installation requirements. Adjusting the nozzle orientation also permits horizontal or vertical swirl stream configurations.

Changes to nozzle direction do not impact pressure drop or volumetric flow rate. For optimal performance, ensure the temperature difference between supply air and room air does not exceed 10 °C, and that the maximum operating temperature for plastic components remains below 60 °C.

For installation in suspended ceilings (Dampa, Armstrong, etc.), a special front panel design is available.

The dimension tables for standard versions of the Halton Jaz JLN diffuser with Halton Pop PLN are shown below.

Dimensions for ceiling installation

Number of nozzle rows	F [mm]
2	177
3	277

F = Size of false ceiling opening

Connect the Halton Jaz JLN linear nozzle diffuser directly to a Halton Pop PLN balancing plenum. Install the plenum in a suspended ceiling with M8 drop rods (not supplied by Halton), then connect it to the ventilation duct.

To continue, access the cross-bars by removing the cover caps from the Halton Jaz JLN front panel screws. The cross-bars are located behind these caps.

Insert and tighten screws into the cross-bars until diffusers are flush with the ceiling. Replace the cover caps to complete the installation.

Finally, units can also be connected in a line using special levelling profiles.

String course mounting

The maximum length is 2000 mm. When the length exceeds 2000 mm, several pieces must be placed side by side. Some alignment guides are provided to make mounting easier.

Airflow can be directed in any direction within a full 360° range by adjusting the deflector nozzles. Each nozzle is individually adjustable without removing or detaching the front panel, ensuring optimal air distribution throughout the room.

The diffuser supports one-, two-, three-, and four-way radial airflow patterns (R1–R4)*. The required pattern is selected by adjusting the deflector nozzles to direct air in the desired number of directions. Figs. 4-7 shows the orientation of the nozzles for two nozzle rows (N=2).

For precise adjustment of the supply airflow rate, install the diffuser with Halton Pop PLN balancing plenum box. Equip the plenum with an measurement and adjustment module (MSM)for supply air.

Accurate flow rate adjustment is achieved using the MSM. To measure, disconnect the linear nozzle diffuser and thread the measuring tubes and adjustment spring through it before reattaching the diffuser.

Use a manometer to measure the pressure difference, then apply the formula below to determine the corresponding air flow rate.

See the table below for the value of the k-factor when installing a diffuser at different distances.

Turn the adjustment spring to set the control damper’s position so the airflow rate is correct.

Secure the damper in position using the screw.

Insert the adjustment spring and tubes into the plenum box, then refit the previously removed diffuser.

To clean the unit,

1. Unscrew (see Fig. 4) the front panel to detach the panel from the plenum bracket.
2. Remove the MSM/MEM module by gently pulling the shaft, never the adjustment spring.
3. Clean the parts only with a damp cloth. Do not immerse any parts in water.
4. Refit the removed MSM/MEM module by pressing the shaft until it stops.
5. Push the diffuser back into place and secure it to the mounting brackets.