RONDO COANDA 100 / 125
3.9" / 4.9" Duct Connection
RONDO 100 / 125
5.9" Duct Connection
3.9" / 4.9" Duct Connection
RONDO 150
KVADRO 100 / 125
3.9" / 4.9" Duct Connection
Round & Square Diffusers
RONDO & KVADRO
RONDO and KVADRO are frameless gypsum diffusers designed to blend completely into the ceiling or wall. The body is plastered and painted to match the surrounding surface, so no frame or trim ring is visible.
Round (RONDO) or square (KVADRO), for supply and exhaust.
High-quality gypsum, spring mounting clips, and a magnetic access cap that lifts off by hand for cleaning and reseats flush.
RONDO is stocked for 4, 5, and 6 in (100, 125, and 150 mm) ducts, and KVADRO for 4 and 5 in (100 and 125 mm), shipped from our New Jersey warehouse.
Red Dot Award Winner 2023
RONDO won the Red Dot Design Award 2023 and the German Innovation Award 2023. Once installed and painted, the diffuser becomes part of the ceiling, with no visible grille or frame.
RONDO COANDA 100 / 125
3.9" / 4.9" Duct Connection
RONDO 100 / 125
5.9" Duct Connection
3.9" / 4.9" Duct Connection
RONDO 150
KVADRO 100 / 125
3.9" / 4.9" Duct Connection
Round and Square Frameless Diffusers
RONDO and KVADRO
RONDO and KVADRO are frameless gypsum diffusers designed to blend completely into the ceiling or wall. The body is plastered and painted to match the surrounding surface, so no frame or trim ring is 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 spring mounting clips and a magnetic access cap. The cap lifts away by hand for cleaning and reseats flush, so the ceiling line stays uninterrupted.
RONDO is stocked for 4, 5, and 6 in (100, 125, and 150 mm) ducts, and KVADRO for 4 and 5 in (100 and 125 mm), shipped from our New Jersey warehouse.
Award-Winning Invisible Ventilation
RONDO won the Red Dot Design Award 2023 and the German Innovation Award 2023. Once installed and painted, the diffuser becomes part of the ceiling, with no visible grille or frame.
RONDO and KVADRO install flush with drywall ceilings and walls. Spring mounting clips hold the body in place, a magnetic cap lifts off by hand for access, and an included damper balances airflow. Both suit residential and commercial spaces for supply and exhaust.
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-C 100
KVADRO 100
Duct Sizes
Body Dimensions
Body Height
Height with Duct
Air Volume Max
3.94"
9.37"
1.89"
3.55"
53 CFM
88.3 CFM
RONDO-C 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"
11.73"
10.63"
10.63"
9.45"
9.45"
5.91"
3.94"
4.92"
3.94"
4.92"
3.75"
3.63"
3.55"
3.55"
3.5"
3.5"
Duct Systems
Application
Features
Paintable Surface, Magnetic Access Cap, Spring Mounting Clips
Steel or Plastic Ducts, Plenum Box
Supply and Exhaust
Contact Ventek America
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Atlantic City, New Jersey
INVISIBLE AIR DIFFUSERS