Round Ceiling Diffuser (with Damper) – 300mm

The pressed swirl diffuser is 595mm x 595mm overall, made to drop into a standard 600mm ceiling tile module. The 4-way diffusers fit the grid at the larger sizes — the 450mm x 450mm neck version has a 595mm x 595mm face — while smaller sizes surface-mount to plasterboard or solid ceilings. Face sizes are stated on every product.

A 4-way diffuser discharges air in four directions through its stepped square face, giving even coverage in regular rooms. A swirl diffuser discharges a rotating pattern that mixes supply air into the room air quickly — a popular choice for open-plan offices and retail. The round ceiling diffuser gives 360-degree distribution and includes a built-in damper for balancing.

If you are feeding the diffuser from round ducting, yes. The 4-way diffusers are offered with or without a plenum, and the pressed swirl is available with an insulated plenum box in 200mm or 300mm depths with top or side entry spigots. If you need a plenum size that is not listed, contact us for a quote.

The pressed swirl diffuser is finished in RAL 9010 (white), and the 4-way diffusers are coated aluminium in a matching white finish — designed to blend with standard ceiling tiles and painted ceilings. All are intended for quiet operation in offices, retail, classrooms and homes.

Size by the neck — the duct connection dimension — not the visible face. 4-way diffusers run from 150mm x 150mm up to 450mm x 450mm necks, and the round diffuser with damper from 150mm to 350mm. Your system design or the existing diffuser being replaced sets the neck size; face sizes are listed against each option.