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Understanding concealed ventilation
Practical guides for architects, owners and HVAC contractors — how concealed, frameless, paintable diffusers work and how to specify them for premium projects in Thailand.
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Guide
Hidden air diffusers, explained
A hidden air diffuser is an air-conditioning supply or extract outlet designed to disappear into the ceiling or wall rather than sit on top of it. Instead of a plastic or aluminium grille, you see a slim slot or a discreet opening — and from normal viewing distance, often almost nothing at all.
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Concealed ventilation diffusers for supply and extract air
A concealed ventilation diffuser is a supply or extract air terminal built into the plasterboard ceiling or wall and finished flush with the surface. It performs the same job as a conventional diffuser — distributing or collecting air — while staying invisible in the finished room.
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Frameless air vents for uninterrupted ceilings and walls
A frameless air vent has no visible border around its opening. Where a conventional vent cover relies on a frame to hide the cut edge of the ceiling, a frameless diffuser is plastered directly into the surface so the finish runs right up to the air gap.
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Paintable air diffusers that match the ceiling
A paintable air diffuser is designed to be painted on site, together with the ceiling or wall around it, so it takes exactly the same colour and sheen as the surface. Rather than matching a vent to the room, the vent simply becomes the room's surface.
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Comparison
RONDO vs LINEO: point or line?
RONDO and LINEO are both concealed, frameless, paintable ERGOVENT diffusers — the difference is shape. RONDO is a round point: a single discreet outlet per position. LINEO is a linear slot: a continuous line of air across the ceiling.
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Guide
How to choose a concealed air diffuser
Choosing a concealed diffuser is a balance of two things: the ventilation duty it has to perform, and the design it has to disappear into. Get either wrong and the result disappoints — an outlet that is quiet and invisible but undersized, or perfectly sized but visually intrusive.
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Guide
Ventilation diffusers for luxury villas in Thailand
Luxury villas in Thailand put ceilings on display: high, open, naturally lit spaces where air-conditioning is essential but a visible grille is unwelcome. Concealed ventilation diffusers resolve that tension — full cooling and ventilation, with ceilings that stay clean.
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