Aluminum Ring Jet Diffuser, All aluminium construction, ClimateCarer air distribution supplier

Aluminum Ring Jet Diffuser

Product name: Aluminum Ring Jet Diffuser

  • Item code: RJD
  • Material: All aluminium construction
  • Used for supply and exhaust of the hot or cold air.
  • Finish: Powder-coated or anodized finish, standard colour RAL9010, RAL9016 or RAL9003, as per customer request.
Category: Tags: , ,
Item code
RJD
Material
All aluminium construction
Finish
Powder-coated or anodized finish, standard colour RAL9010, RAL9016 or RAL9003, as per customer request.
Notes
Used for supply and exhaust of the hot or cold air.

What it is

This unit is supplied as item code RJD, in All aluminium construction, finished with Powder-coated or anodized finish, standard colour RAL9010, RAL9016 or RAL9003, as per customer request.. A diffuser is where the air leaves the system and, in practice, where most complaints about an HVAC system actually begin. The duct can be perfectly balanced and the diffuser can still produce a draught on the back of a neck or a whistling noise at a desk. What a diffuser does is turn a fast, directional jet from the duct into a slow, spreading, entraining flow that mixes with the room air before it reaches the occupant.

The range covers the geometries that cover the room types: square and round panel diffusers for a ceiling, ring jet diffusers for a high-sidewall or a large open volume, plastic air grilles and vents for service openings and bathrooms, and ABS plastic ceiling diffusers for the residential and light commercial market where the fitting has to be light, cheap and white.

Neck size, blade damper and facing are the three things that decide whether a diffuser fits and behaves. The neck matches the duct or the flexible duct that feeds it; the damper sets the volume without a separate regulator; the facing is the part the occupant sees, so it is also the part the architect has an opinion about.

Technical specification

Item codeRJD
MaterialAll aluminium construction
FinishPowder-coated or anodized finish, standard colour RAL9010, RAL9016 or RAL9003, as per customer request.
NotesUsed for supply and exhaust of the hot or cold air.

How to choose the right one

  1. Size the diffuser neck to what feeds it, not to the room. A neck that does not match the duct means a transition at the last metre, which is exactly where the pressure drop and the noise appear.
  2. Match the throw and the drop to the ceiling height. A diffuser that throws too far in a low ceiling puts cold air on occupants; one that throws too short leaves a stagnant core in the middle of the room.
  3. For a large open volume or a high sidewall, a ring jet diffuser gives the long throw and the induction needed instead of a ceiling panel.
  4. Choose the material from the room. Extruded aluminium for a visible commercial ceiling; ABS plastic for residential and light commercial where weight and price matter more.
  5. Take the damper option where commissioning has to set the volume at the terminal rather than at the fan — an opposite blade damper and a slide-type volume control are the two common answers and they suit different duct connections.

Material and finish options

MaterialFinishTypical use
Extruded aluminiumRAL9010 / 9016 / 9003, or customer RALCommercial ceilings, visible faces
All aluminium constructionPowder coated or anodisedGeneral commercial supply and extract
AluminiumAnodised or powder coatedWet areas and a specified look
ABS + PP plasticWhite, black or customResidential, light commercial, bathrooms
All aluminium ring jetPowder coated or anodisedHigh sidewalls, large volumes

Installation

  1. 1
    Connect to the duct or the flexible duct with the transition the neck size calls for, and pull the flexible duct back so it does not compress into the neck.
  2. 2
    Set the blade damper to the position the commissioning figure gives before closing the ceiling — adjusting it afterwards means opening the ceiling.
  3. 3
    Fix the face flush to the ceiling or the soffit line, and check the gap around the trim with a level; a tilted face is the first thing anyone notices above a dropped ceiling.
  4. 4
    Fit the neck adapter or the opposite blade damper where the product lists it as an accessory, in the orientation the airflow direction requires.
  5. 5
    Commission the terminal to the design volume and record it, so the diffuser position that produces draughts can be distinguished from one that simply was never set.

Where it is used

Office and open plan
Ceiling panel diffusers on a regular grid.
Retail and atria
Ring jet diffusers on high sidewalls for long throw.
Hospital and clinic
ABS and aluminium terminals in washable areas.
Residential
Plastic ceiling diffusers and wall vents on mini split and heat pump systems.
Hotels
Suites and corridors with tight ceiling voids.

Packaging, shipping and OEM

Minimum order quantityMOQ is normally 300–500 pcs per model for stock items and 500 pcs per model for made-to-order sizes
Lead time25-30 days for standard sizes after order confirmation; tooling for new tooling parts starts around 35 days
SamplesSample pieces can be sent 3-5 days against your specification; courier cost is on the buyer side for the first trial order
PackingStandard export packing: bulk in corrugated cartons with pallet on request; retail colour box and printed barcode available for OEM orders
OEMOEM is available — item code, laser logo, carton print and retail box can all carry your brand
Trade termsFOB Ningbo / Shanghai; T/T 30% deposit before production and 70% against copy of B/L

Frequently asked questions

How do I choose the diffuser size?
From the airflow and the throw you need at that ceiling height, with the neck matching what feeds it. Send the airflow, the ceiling height and the room dimension and we will confirm the size rather than guess.
What is the difference between CD-SA, CD-RA and CD-RB?
They are the square and round panel diffuser geometries in the aluminium range, with different neck and blade arrangements. The size and the damper option decide which one fits; send the neck size and we will confirm the model.
Do I need the damper as an accessory?
If commissioning is done at the terminal, yes — an opposite blade damper or a slide-type volume control lets the volume be set without going back to the fan. If the system is balanced at the fan, the plain face is enough.
Can I get a non-standard colour?
Yes, powder coating to a customer RAL is available on the aluminium types. Send the RAL reference and the quantity.
Are plastic diffusers suitable for commercial ceilings?
They suit residential and light commercial work, and secondary bedrooms and corridors. For a principal commercial face where the flatness and the finish matter, extruded aluminium is the better specification.
What is the standard neck size?
The neck is made to the duct or flexible duct diameter you connect to. Tell us the neck diameter and the connection type and we will confirm the model.

Related parts and capabilities

Not sure which variant fits? Send the drawing, the profile width or the outside diameter and we will confirm the part before you order. Email sales@climatecarer.com

Dimension

Product CodeΦA(mm)B(mm)H(mm)
RJD 15015022048
RJD 20020027048
RJD 25025032048
RJD 30030037048
RJD 35035042048
RJD 40040047048

Related products

Need Help?