RONDO COANDA 100 / 125
3.9" / 4.9" Duct Connection
RONDO 100 / 125
5.9" / 6.3" Duct Connection
3.9" / 4.9" Duct Connection
RONDO 150 / 160
KVADRO 100 / 125
3.9" / 4.9" Duct Connection
ERGOVENT
RONDO & KVADRO
RONDO and KVADRO are frameless gypsum diffusers designed to blend completely into ceilings and walls. Once plastered and painted, only a clean architectural opening remains visible.
Available in round (RONDO) and square (KVADRO) designs, these diffusers support both supply and exhaust ventilation applications while maintaining a seamless interior appearance.
Engineered from high-quality gypsum, these units feature adjustable mounting hardware and magnetic access caps, providing reliable airflow performance without compromising design.
RONDO is the recipient of the Red Dot Award and German Innovation Award for product design excellence.
Red Dot Award Winner 2023
The RONDO earned the Red Dot Award 2023 in the HVAC product design category, selected from over 20,000 competing products worldwide.
RONDO COANDA 100 / 125
3.9" / 4.9" Duct Connection
RONDO 100 / 125
5.9" / 6.3" Duct Connection
3.9" / 4.9" Duct Connection
RONDO 150 / 160
KVADRO 100 / 125
3.9" / 4.9" Duct Connection
ERGOVENT
RONDO and KVADRO
RONDO and KVADRO are frameless gypsum diffusers designed to blend completely into ceilings and walls. Once plastered and painted, only a clean architectural opening remains visible.
Available in round (RONDO) and square (KVADRO) designs, these diffusers support both supply and exhaust ventilation applications while maintaining a seamless interior appearance.
Engineered from high-quality gypsum, these units feature adjustable mounting hardware and magnetic access caps, providing reliable airflow performance without compromising design.
RONDO is the recipient of the Red Dot Award and German Innovation Award for product design excellence.
Award-Winning Invisible Ventilation
RONDO received the Red Dot Award and German Innovation Award for its ability to combine high-performance airflow with a completely frameless architectural appearance. Once installed, the diffuser becomes an integral part of the ceiling, delivering comfort without visual distraction.
For architects and builders looking to eliminate ugly grilles, RONDO and KVADRO are the ideal solutions. These gypsum diffusers install flush with drywall surfaces, while integrated magnetic caps and adjustable airflow controls simplify their installation. They work perfectly in both homes and commercial spaces, delivering clean aesthetics without choking airflow.
Designed to disappear, built to last
A seamless round diffuser for residential and commercial interiors where ventilation should remain invisible.
A square frameless diffuser designed to integrate cleanly into modern architectural spaces.
Concealed airflow is distributed along the ceiling surface for maximum comfort and minimal visual impact.
Use Cases
RONDO COANDA
RONDO
KVADRO
A square frameless diffuser designed to integrate cleanly into modern architectural spaces.
A seamless round diffuser for residential and commercial interiors where ventilation should remain invisible.
Concealed airflow is distributed along the ceiling surface for maximum comfort and minimal visual impact.
Use Cases
RONDO COANDA
RONDO
KVADRO
RONDO / KVADRO SPECIFICATIONS
RONDO 100
RONDO 125
RONDO 150
RONDO 160
R-COANDA 100
KVADRO 100
Duct Sizes
Body Dimensions
Body Height
Height with Duct
Air Volume
3.94"
9.37"
1.89"
3.5"
53 CFM
88.3 CFM
88.3 CFM
R-COANDA 125
KVADRO 125
53 CFM
53 CFM
73.6 CFM
58.9 CFM
73.6 CFM
4.92"
9.37"
1.89"
1.89"
1.89"
1.89"
1.89"
1.97"
1.97"
11.65"
11.65"
10.63"
10.63"
2 x 9.45"
2 x 9.45"
5.91"
6.3"
3.94"
4.92"
3.94"
4.92"
3.5"
3.58"
3.58"
3.55"
3.55"
3.5"
3.5"
Duct Systems
Application
Additional Features
Easy Installation, Paintable Surface, Antistatic, Noiseless; Made frmo Recycled Plastic
Steel or Plastic Ducts, Plenum Box
Supply and Exhaust
Contact Ventek America
609.233.0747
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Wholesale Inquiries
Accessories
Atlantic City, New Jersey
INVISIBLE AIR DIFFUSERS