Explore the full Ventmann diffuser range in one place

Give your project the precision it deserves. Our Technical Catalogue brings together every detail about Ventmann’s frameless gypsum diffusers — from airflow performance to installation guidance — in a single, easy‑to‑use resource.

“Each of our products is so much more than just another vent diffuser. They are minimalist interior elements that can be integrated discreetly into any interior…”
“Our philosophy is that modern interiors need modern vents.

Technical Catalogue - SIDE CIRCLE and SQUARE

Dive into our comprehensive technical catalogue to find complete specifications, tailored project solutions, and in-depth installation instructions.

Installation Manual - PCIRCLE / WING Diffusers

DEasy install your PCIRCLE or WING Diffuser with our clear, step-by-step installation manual. Designed for simplicity and precision, ensuring a perfect fit and seamless finish every time.

Precision engineering meets minimalist design

The Ventmann Technical Catalogue is the definitive resource for architects, HVAC engineers, interior designers, and construction professionals who demand both technical accuracy and aesthetic excellence. Inside, you’ll find a complete breakdown of our frameless gypsum diffusers — a product family that has redefined how air distribution can look and perform in contemporary spaces.
Ventmann diffusers are built on a simple philosophy: air systems should not interrupt the visual harmony of an interior. As the catalogue states, “Each of our products is so much more than just another vent diffuser. They are minimalist interior elements that can be integrated discreetly into any interior…” This commitment to elegance, innovation, and sustainability runs through every page of the catalogue and every product we manufacture.

A New Standard in Modern Ventilation

Ventmann is the first manufacturer to engineer vent diffusers from a patented gypsum composite. This material allows our diffusers to be fully frameless, plastered in, and painted with the same finish as the surrounding surface. The result is a seamless integration that preserves architectural lines and elevates the overall design.
Our catalogue explains how this approach supports three core values:
• Innovation — The first frameless gypsum diffusers on the market, designed for modern interiors.
• Sustainability — Gypsum is a clean, natural, and environmentally responsible material.
• Elegance — Diffusers that blend into walls and ceilings without visible frames or interruptions.
This combination of engineering and design excellence earned Ventmann the Red Dot Design Award, one of the world’s most respected recognitions for product design.

Explore the Full Ventmann Product Range

The Technical Catalogue provides detailed information on every diffuser series we produce. Each family is engineered for specific airflow needs, installation conditions, and aesthetic goals.
LINE Series
Our most versatile and widely used diffuser. Available in 1‑slot, 2‑slot, and 3‑slot configurations, with standard lengths of 625 mm, 1000 mm, and 1250 mm. Slot widths include 12 mm and 18 mm, with optional deflectors for directional airflow control.
The LINE series can be installed as a subtle architectural detail or used to create continuous linear elements that become part of the interior design. As the catalogue notes, “With this model, you can create strikingly unique interior elements. Or you can make the diffusers virtually invisible.”
PLINE (Performance Line)
Engineered for air‑conditioning systems, PLINE uses the Coanda effect to deliver efficient, comfortable airflow. The catalogue includes performance charts, throw distances, and pressure drop data for precise HVAC planning.
CIRCLE & PCIRCLE
Round frameless diffusers designed for both supply and exhaust. PCIRCLE includes a Click‑system removable cap for easy maintenance and access. These models offer a soft, balanced airflow pattern ideal for residential and commercial spaces.
SQUARE Series
A geometric, architectural option for designers who prefer clean, rigid lines. The SQUARE series maintains the same plaster‑in, paintable finish as all Ventmann diffusers.
ART Series
A creative, highly adaptable solution for fireplaces, inspection hatches, and custom ventilation needs. ART diffusers can be produced in bespoke shapes and sizes, offering complete design freedom.

Technical Data for Professionals
The catalogue includes extensive performance tables for both supply and exhaust applications. These tables cover:
• Airflow rates (m³/h)
• Throw distances (X in meters)
• Pressure drop (Pt in Pa)
• Sound pressure levels (SPLA in dB(A))
• Effective area (Ak in m²)
This data allows HVAC engineers to select the correct diffuser size, slot configuration, and airflow capacity for any project. The catalogue also includes colour‑coded guidance (Green / Yellow / Red) to help professionals quickly identify suitable performance ranges based on noise levels, pressure requirements, and throw distances.

Installation Guidance & Accessories
Ventmann diffusers are designed for straightforward installation without lowering the ceiling height. The catalogue provides:
• Step‑by‑step installation diagrams
• Plaster‑in instructions
• Guidance for creating continuous lines
• Deflector usage recommendations
• Plenum box compatibility charts
• Dimensions for standard and insulated plenum boxes
Accessories such as deflectors, Click‑system caps, and adapters are also fully documented, ensuring installers have everything they need for a smooth and efficient installation.

Designed for the Future of Interior Airflow
Ventmann’s vision is to grow alongside our partners by delivering products that combine technical performance with architectural beauty. Our catalogue reflects this commitment, offering clarity, precision, and transparency for every model we produce.
Whether you are designing a residential home, a commercial office, or a high‑end hospitality project, the Ventmann Technical Catalogue gives you the information you need to specify, plan, and execute with confidence.