Hidden gypsum air vent covers | RONDO and KVADRO

ERGOVENT RONDO / KVADRO ventilation diffuser has established itself as a smart, long-lasting, and functionally pleasing air vent cover for ceilings and walls, combining optimal airflow, reliable performance, and seamless aesthetics.

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Thoughtful design, made to last

Round air vent cover combines seamless integration with efficient airflow distribution and low noise levels. Designed for supply and extract air, it suits residential and commercial spaces alike. Made from durable materials, it ensures reliable performance while blending smoothly with modern interiors.

Pure high-quality gypsum frame
Standard duct connections (100, 125, 150, 160 mm)
Balancing damper
Groove for filler locking
Anti-vibration gasket between the frame and the connector
Aerodynamic convex shape to reduce air vortices
Convenient fastening system for 1 or 2 layer plasterboard
Reliable magnetic holders hold up to 10,75 kg

Design and aesthetics

ERGOVENT gypsum diffusers are a standout product. Its combination of sleek design, efficient performance, and quiet operation makes it a valuable addition to any space.

: RONDO earned the prestigious Red Dot award for its sleek, unobtrusive design. Utilizing advanced materials and manufacturing techniques, this hidden gypsum diffuser pushes the boundaries of traditional HVAC solutions, earning recognition from Germany Innovations for its innovative approach.
: ERGOVENT gypsum diffusers' can be fully painted or finished to perfectly match any surface, ensuring seamless integration with their surroundings.
: Gypsum diffuser is designed for flush mounting on ceiling or wall surfaces, allowing to blend seamlessly with the surrounding area.

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Performance

ERGOVENT gypsum diffusers provide quiet, efficient airflow with durable, low-maintenance design that are ideal for comfort and energy efficiency in any space.

: RONDO / KVADRO is a universal hidden ventilation diffuser for both supply and exhaust air. Its sleek, circular design ensures balanced airflow, quiet operation, and easy integration into any interior.
: Noise reduction is one of a key features in the design of RONDO / KVADRO ventilation diffuser. Thanks to the aerodynamic improvements of ERGOVENT gypsum diffuser, the resistance to the air flow has been further reduced.
: Because of the gypsum that the RONDO / KVADRO air diffuser is made of, it has a property to absorb sound that bounces off the plaster surface which is smooth and clear. Its body is firm and homogeneous. When installed in drywall / plasterboard ceilings or walls, the gypsum diffuser reduces sound vibrations, helping maintain acoustic quality. It’s ideal for spaces needing both air quality and noise control, like offices, classrooms, and healthcare facilities.

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Quick and easy installation

RONDO and KVADRO diffusers feature standard duct connections of 100 mm, 125 mm, 150 mm, and 160 mm, compatible with both rigid air ducts and flexible ducts.
ERGOVENT gypsum diffusers are compatible with both single and double layers of plasterboard, enabling seamless, flush installation in a variety of ceiling and wall designs.
The magnetic holders used in RONDO and KVADRO gypsum diffusers provide a secure and reliable attachment, supporting up to 10.75 kg

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Technical info

	RONDO 100	RONDO 125	RONDO 150	RONDO 160	KVADRO 100	KVADRO 125
Sizes	100 (mm)	125 (mm)	150 (mm)	160 (mm)	100 (mm)	125 (mm)
Body diameter	238 mm	238 mm	296 mm	296 mm	240×240 mm	240×240 mm
Duct connection diameter	100 mm / 4”	125 mm / 5”	150 mm / 6”	160 mm / 6.3”	100 mm / 4”	125 mm / 5”
Duct systems	Steel or plastic ducts, Plenum box	Steel or plastic ducts, Plenum box	Steel or plastic ducts, Plenum box	Steel or plastic ducts, Plenum box	Steel or plastic ducts, Plenum box	Steel or plastic ducts, Plenum box
Body height	48 mm	48 mm	50 mm	50 mm	48 mm	48 mm
Height with connector	89 mm	89 mm	91 mm	91 mm	89 mm	89 mm
Air wolume	Up to 90 m/h per diffuser	Up to 90 m/h per diffuser	Up to 130 m/h per diffuser	Up to 130 m/h per diffuser	Up to 92 m/h per diffuser	Up to 92 m/h per diffuser
Air flow	Supply and Exhaust	Supply and Exhaust	Supply and Exhaust	Supply and Exhaust	Supply and Exhaust	Supply and Exhaust
Additional features	Paintable, anti-static	Paintable, anti-static	Paintable, anti-static	Paintable, anti-static	Paintable, anti-static	Paintable, anti-static

	RONDO 100
Sizes	100 (mm)
Body diameter	238 mm
Duct connection diameter	100 mm / 4”
Duct systems	Steel or plastic ducts, Plenum box
Body height	48 mm
Height with connector	89 mm
Air wolume	Up to 90 m/h per diffuser
Air flow	Supply and Exhaust
Additional features	Paintable, anti-static

	RONDO 125
Sizes	125 (mm)
Body diameter	238 mm
Duct connection diameter	125 mm / 5”
Duct systems	Steel or plastic ducts, Plenum box
Body height	48 mm
Height with connector	89 mm
Air wolume	Up to 90 m/h per diffuser
Air flow	Supply and Exhaust
Additional features	Paintable, anti-static

	RONDO 150
Sizes	150 (mm)
Body diameter	296 mm
Duct connection diameter	150 mm / 6”
Duct systems	Steel or plastic ducts, Plenum box
Body height	50 mm
Height with connector	91 mm
Air wolume	Up to 130 m/h per diffuser
Air flow	Supply and Exhaust
Additional features	Paintable, anti-static

	RONDO 160
Sizes	160 (mm)
Body diameter	296 mm
Duct connection diameter	160 mm / 6.3”
Duct systems	Steel or plastic ducts, Plenum box
Body height	50 mm
Height with connector	91 mm
Air wolume	Up to 130 m/h per diffuser
Air flow	Supply and Exhaust
Additional features	Paintable, anti-static

	KVADRO 100
Sizes	100 (mm)
Body diameter	240×240 mm
Duct connection diameter	100 mm / 4”
Duct systems	Steel or plastic ducts, Plenum box
Body height	48 mm
Height with connector	89 mm
Air wolume	Up to 92 m/h per diffuser
Air flow	Supply and Exhaust
Additional features	Paintable, anti-static

	KVADRO 125
Sizes	125 (mm)
Body diameter	240×240 mm
Duct connection diameter	125 mm / 5”
Duct systems	Steel or plastic ducts, Plenum box
Body height	48 mm
Height with connector	89 mm
Air wolume	Up to 92 m/h per diffuser
Air flow	Supply and Exhaust
Additional features	Paintable, anti-static

FAQ

: ERGOVENT gypsum diffuser can be installed by connecting it to standard duct systems with diameters of 100 mm, 125 mm, 150 mm, or 160 mm. The installation method depends on the type of air duct system being used. For metal ducts, you can connect the diffuser directly or via a flexible duct. If using a flexible plastic duct system, connect it through a plenum box. The diffuser is designed to be plastered into the ceiling for a seamless finish, and it’s important to ensure the drywall is optimal for installation. After securing the diffuser, it should be finished with appropriate fillers and painted to match the ceiling. For detailed instructions, refer to the installation manual provided by ERGOVENT.
: ERGOVENT gypsum diffusers offer a range of benefits, including seamless integration into ceilings for a clean and smart look. They ensure efficient air distribution, promoting even airflow and temperature control, which helps improve HVAC system performance and reduce energy costs. The sound-absorbing properties of gypsum also contribute to quieter indoor environments. Additionally, gypsum is naturally fire-resistant, enhancing safety, while the diffusers are durable, low-maintenance, and easy to install in both new and renovated spaces. Made from eco-friendly, recyclable material, ERGOVENT diffusers are an environmentally conscious choice for modern buildings.”
: To adjust the airflow for ERGOVENT gypsum diffusers, use the built-in balancing valve located inside the diffuser. Start by removing the diffuser cover to access the damper. This damper can be adjusted to increase or decrease airflow as needed. Make sure to keep the diffuser cover level with the ceiling after making adjustments. Regularly check and fine-tune the airflow to ensure optimal performance based on changes in room usage or system demand.

: ERGOVENT RONDO diffusers operate at an extremely low noise level. The design incorporates aerodynamic improvements that significantly reduce airflow resistance and noise. Made from gypsum, these diffusers also possess acoustic properties that help absorb sound, making them quieter than traditional metal diffusers. In a quiet room environment, the operation of the RONDO or KVADRO diffuser is hardly noticeable, provided there is no additional noise from the duct system itself.
: Yes, ERGOVENT gypsum diffusers can be used in bathrooms and kitchens. They are designed to withstand humid environments and are made from high-quality gypsum, which has antistatic properties that prevent dust accumulation. Additionally, these diffusers provide a seamless aesthetic as they can be painted to match the ceiling and operate quietly, making them suitable for residential spaces. Proper installation and maintenance ensure their effectiveness in managing airflow in these areas.
: Yes, ERGOVENT diffusers can be used for air conditioning systems. They are designed to work effectively with fan-coil units, helping to conceal the air conditioning components while ensuring quieter operation and more even air distribution in the room. The diffusers can be connected to standard duct systems with diameters of 100 mm, 125 mm, 150 mm, or 160 mm, making them versatile for various installation scenarios.

Hidden gypsum air vent covers | RONDO and KVADRO

Thoughtful design, made to last

Design and aesthetics

Performance

Quick and easy installation

Technical info

FAQ

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