Comparison
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.
This guide compares them by what actually drives the decision: the room, the ceiling design and how the air is delivered.
A point diffuser concentrates supply or extract at one location — ideal when a room needs a single outlet and the ceiling has no particular linear organisation. A linear slot spreads the same function along a line, which suits larger or more deliberately detailed ceilings where a continuous element reads as part of the architecture.
Neither is inherently better. RONDO disappears as a small opening; LINEO disappears as a thin line. The right one depends on what the ceiling is trying to be.
RONDO — and its square counterpart KVADRO — suits bedrooms, bathrooms, dressing rooms and other individual spaces, and is a natural fit for renovations working from existing round ducting. LINEO suits living areas, open-plan spaces and suites where a linear detail aligns with lighting and joinery.
On larger or premium projects, LINEO PRO extends the linear option with detailing developed specifically for design-led interiors.
When to use it
One discreet outlet in a bedroom, bathroom or study.
A continuous line of air across a larger or open-plan ceiling.
Renovations working from existing round ductwork.
Ceilings organised around lines of light and joinery.
Before you order
Concealed diffusers are specified against the project, not from a shelf. Confirm these before ordering:
All technical data must be verified against the current manufacturer documentation for your specific configuration before specification and installation.
Products
Round concealed point diffuser — a discreet circle of air, flush with the surface and painted to match.
Best for: Round ceiling or wall integration — renovations and room-by-room ventilation.
Concealed linear slot diffuser — ventilation as a single clean line across the ceiling.
Best for: A linear, minimal ceiling detail in living spaces and suites.
Premium concealed linear diffuser for projects where the ceiling detail is part of the design.
Best for: Advanced linear detailing for design-led villas, hotels and workspaces.
Send your ceiling plans and duct sizes and our Thailand team will recommend the right models, confirm the configuration and prepare a quotation.