Built-in gypsum diffuser RONDO-COANDA Ø125 mm
This offer ends in:
- Stock: In Stock
- Product Code: RN125.CO
- Weight: 3.40kg

ERGOVENT RONDO COANDA 100–125 is a round built-in plaster diffuser designed for air supply along the ceiling surface using the Coanda effect, which is ideal for modern interiors where airflow comfort and discretion are key. It is available in two sizes – Ø100 mm and Ø125 mm.
Key features:
- Coanda effect: directs airflow along the ceiling rather than downwards, which is ideal for rooms where people sit or work directly under the diffuser.
- Strong fixing central cover.
- The set includes a pre-cut fixing mesh: a fibreglass mesh that does not require cutting during installation.
- High-quality plaster body: Hard, smooth, paint-ready surface.
- Universal connection options: Can be connected to metal, flexible or plastic air ducts using the diffuser box.
- Quick and easy installation: Mounts directly onto plasterboard with adjustable fasteners suitable for all plasterboard thicknesses.
- Extremely quiet operation: The acoustic properties of plaster and the aerodynamic design ensure minimal noise.

Main advantages:
- Easy, quick and simple installation.
- Fully painted in the same color as the ceiling/walls.
- No dirt rings form around the diffuser.
- Suitable for single-layer, double-layer or non-standard thickness plasterboard panels.
- Secure packaging.
Coanda diffusers are suitable for both air supply and exhaust, but their properties work best in supply mode.
ERGOVENT - It's the "latest trend!" It's a great solution to stand out from the usual frame air diffusers. Not only do they perform their diffuser functions perfectly, but they also serve as a stylish ceiling detail, giving your home a modern and aesthetic look!


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WHY CHOOSE ERGOVENT GYPSUM DIFFUSER?
Specialists choose ERGOVENT due to its convincing technical parameters, clear and fast installation! End customers enjoy flawless appearance, quiet operation, safe operation and easy care!
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Reliable holders The cap is held firmly by reliable magnetic holders, not screw heads |
Built-in silencers New Rondos have built-in airflow regulators/noise attenuators |
Easy installation Easy and convenient installation. Suitable for 1 or 2 layers of plaster
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Works extremely quietly Thanks to the aerodynamic improvements, the diffuser has less eddies and less resistance |
Color integrity The diffuser can be painted with ceiling paint. The ceiling will look perfect, no matter what color you choose |
No connections visible The plaster body fits perfectly to the ceiling, no joints are visible |
HIGH GYPSUM QUALITY
ERGOVENT gypsum body is durable and seamless. The fastening elements are poured into the housing, nothing is drilled and nothing is glued to it. During the casting of diffusers, the smallest air bubbles are removed, the surface of the plaster is as smooth and white as snow.

RELIABLE COVER ATTACHMENT
The Coanda plaster cover has an improved formula that is much lighter than a conventional Rondo diffuser. The cover's "armor" (internal plastic part) is a patented solution that protects against damage.
In the ERGOVENT diffuser, this cover is held in place by magnetic holders, and the surface of these magnets adheres to the magnetized stainless steel parts in the cover, holding it very securely. Since there are no magnets in the cover, there is no magnetic field that attracts dust.

EASY AND CONVENIENT INSTALLATION
The ERGOVENT gypsum diffuser is the only built-in diffuser that is easy to install even if the ceiling is already installed but needs to be connected to a rigid air duct. Can be mounted on a plasterboard ceiling, puttyed and completely painted with the same ceiling paint. Only an aesthetic ring-shaped opening for air flow will remain in the ceiling. The diffuser is fastened with self-tapping screws directly to the plasterboard. The fastening elements are adjustable and can be adjusted in one moment to one or two layers of plasterboard (if necessary, also to any non-standard thickness).
Diffusers are suitable for all types of connection. They can be added:
1) With diffuser box

2) directly on the air duct

EXCELLENT AERODYNAMICS
During the design, KTU scientists came to the rescue to simulate the operation of the diffuser. Several geometric changes have been tried to achieve the best aerodynamic properties. Including a special "belly" inside the lid, which effectively reduces air vortices inside the diffuser. Resistance to airflow and noise levels are also significantly reduced.

VERY LOW NOISE
Gypsum has not only antistatic (dust does not stick to it), but also acoustic properties. Some of the sounds that "hit" the gypsum surface are absorbed. The aerodynamic improvements of the ERGOVENT diffuser further reduce the resistance to air flow. In view of all the above, it is safe to say that this diffuser operates quieter than any metal diffuser. Simply put, the operation of the diffuser in a quiet room environment is not actually felt (unless, of course, additional noise is generated by the air duct system).
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