Ceiling Diffusers (Supply & Return)

Square, flush-mounted, 1- to 4-way, 150 to 600 mm

Sizes: Necks 150 × 150 – 600 × 600 mm
Airflow: 80 – 2,960 m³/h
Patterns: 1-, 2-, 3- and 4-way
Mounting: Flush, ceilings up to 4 m

ISO 9001 Quality management

Overview

Precision-engineered for flush mounting. Our square ceiling diffusers serve supply or extract in rooms up to 4 m high, with a supply air temperature differential of up to ±10 K, discharging horizontally along the ceiling in 1-, 2-, 3- or 4-way patterns.

The face is a peripheral border, fixed air control blades and a centre cone in extruded aluminium, held by spring screws so it lifts out for access. Behind it, an opposed-blade damper adjustable from the face with a special key sets the airflow, and a galvanized plenum box with a side-entry spigot steadies the air before it leaves; an insulated plenum lowers the sound level further.

Necks run from 150 × 150 to 600 × 600 mm, handling 80 to 2,960 m³/h at 2 to 6 m/s. In independent tests at Cairo University's Measurements and Calibration Labs, a 450 × 450 mm diffuser delivered 725 to 1,730 m³/h at 29 – 30 dB.

Configurations & options

1-way
2-way
3-way
4-way
Supply or return
With plenum box
With damper

Materials & finishes

Extruded aluminium face and damper
Galvanized steel plenum box
RAL 9010 electrostatic powder coat as standard; any RAL colour or anodized on request

Technical specifications

Performance

Airflow: 80 – 2,960 m³/h at 2 – 6 m/s
Effective area: 0.011 – 0.137 m²
Static pressure: 2.4 – 22 Pa
Temperature differential: Up to ±10 K
Lab-tested sound: 29 – 30 dB, 450 mm at 725 – 1,730 m³/h

Sizes

Neck: 150, 225, 300, 375, 450, 525, 600 mm square
Face: 300 × 300 – 750 × 750 mm
Plenum spigot: Ø 150 – 300 mm, side entry
Ceiling tile: 595 × 595 mm lay-in

Construction

Face: Extruded aluminium, fixed blades, centre cone
Damper: Opposed blade, set from the face with a key
Plenum box: Galvanized steel, insulated on request
Fixing: Face screws, side fixing, or ceiling tile
Finish: RAL 9010 powder coat; anodized or any RAL

Certifications & standards

What each mark on this product means, who issues it and how it applies here.

All certifications & standards

ISO 9001

Quality Management Systems

Issued by International Organization for Standardization (ISO)

What it is

The international standard for quality management systems. A certified company works to documented processes, checks its output against them, records what it finds and corrects the cause of any fault, and is audited on all of it by an independent certification body.

On this product

Designed, fabricated and inspected under our certified ISO 9001 quality system: the same documented process for every unit, whichever of our factories builds it.

How much air does each size handle?

At 2 to 6 m/s: 80 – 240 m³/h for a 150 mm neck, 275 – 820 for 300 mm, 580 – 1,740 for 450 mm and 990 – 2,960 m³/h for 600 mm.

Has the diffuser been independently tested?

Yes. Cairo University's Measurements and Calibration Labs measured a 450 × 450 mm diffuser at 725 to 1,730 m³/h and recorded 29 – 30 dB across the range (certificate MCL 0721801Z/A).

Will it fit a 600 mm ceiling tile?

Yes. The diffuser is made in a 595 × 595 mm lay-in version for tile ceilings, besides face-screwed and side-fixed versions.

Can the colour match the ceiling?

Yes. RAL 9010 white powder coat is standard; any RAL colour or a matt anodized aluminium finish is available on request.

Products that work alongside it, then the rest of Air Terminals & Distribution.

Explore the family