Category: Air technology
Roof hoods for manhole ventilation with CE certificate
The long throw nozzles are ideal for use in large and high rooms, such as concert halls, theaters, museums, airports, shopping malls and factory hallsÂ
The ventilation grilles for installation in the floor (floor grilles) offer the ideal way to ventilate or aerate a room without taking up too much space, while maintaining an elegant appearance.
Ventilation systems play a central role in modern buildings and industrial plants. They ensure a healthy and efficient indoor climate, optimize air quality and contribute significantly to the comfort and safety of users. rotec GmbH Berlin, as an experienced specialist in metal processing, offers high-quality solutions in this area, which not only impress with their functionality, but also with their quality.
With over 35 years of experience in the industry, rotec has established itself as a leading supplier of ventilation systems. Our range includes a wide spectrum of products, from ventilation grilles to weather protection grilles, louvred façades and specialized solutions such as RC2 burglar-resistant ventilation grilles for night cooling. This diversity enables us to supply tailor-made solutions for the most diverse requirements of our customers - be it for schools, server rooms, data centers or other specific areas of application.
The quality of our products and services is the foundation of our success. rotec is proud to be recognized by several prestigious certificates, including DIN EN ISO 9001:2015, DIN EN 1090-1/2, EXC 1+2 and DIN EN ISO 3834-3. These certificates demonstrate our continuous commitment to the highest quality standards in production, metal processing and the implementation of customer-specific projects. They give our customers the certainty that with rotec they have a partner at their side who does not compromise on quality and reliability.
As a premium partner of the companies Renson and Grada from Belgium and with an extensive stock of around 1200 different types of sheet metal, rotec is able to react quickly and flexibly to the needs of the market. Our expertise in the
allows us to develop innovative and sustainable solutions for ventilation systems that are not only functional but also aesthetically pleasing.
In line with our anniversary this fall, which marks 35 years of excellence and innovation, rotec invites you to delve deeper into the world of air technology. Visit our blog at [rotec-blog.de](https://www.rotec-blog.de/category/products/lufttechnik/) to find out more about our latest developments, projects and solutions in this field. There we share our expertise, offer insights into our work processes and show how our products help to meet the demands of modern architecture and industrial requirements.
Let us convince you of the quality and innovative power of the ventilation systems from rotec. We are your ideal partner for a healthy, safe and efficient indoor climate.
Renson Linius louvre fabrication: Custom louvre facades from rotec Berlin
rotec fabricates Renson Linius aluminium louvres into project-specific louvre facades, ventilation grilles and equipment enclosures. For 30 years, this Berlin-based Renson premium partner has combined system expertise with its own manufacturing and installation experience.
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D40 Ventilation Hood for Underground Garage Ventilation: A Project from Hamburg
This project example shows a D40 ventilation hood for the underground parking garage ventilation system of an office complex in northern Hamburg. The existing shaft opening was part of the project-specific ventilation concept and was used for air distribution. However, the horizontal grating provided only limited protection against rain, snow, and leaves entering the shaft. For this reason, rotec developed a weather-optimized ventilation hood as a custom design specific to the project. The D40 ventilation hood directs the air through lateral louvered surfaces. At the same time, the slightly domed roof directs precipitation away to the sides. This article explains the initial situation, the structural design, and key planning requirements. Key Points at a Glance: rotec developed and installed the D40 ventilation hood as a custom design specific to this project. Side...
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Ventilation hoods as street furniture: Cleverly combining seating and green roofs
Ventilation hoods, as elements of urban furniture, combine technical ventilation with enhanced quality of life. This article demonstrates how seating areas, backrests, green roofs, open-air spaces, maintenance access, and appropriately designed louvers are planned on a project-by-project basis. rotec develops and manufactures custom solutions for rooftop terraces, courtyards, underground parking garage ceilings, and outdoor areas.
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Ventilation grille rain resistance to DIN EN 13030: Rain protection, drainage channels and planning
The rain resistance of ventilation grilles is an important consideration for exposed facades, plant rooms, data centres, roof hoods and ventilation hoods. This article explains how rain resistance is assessed under DIN EN 13030, what classes A to D mean, why air velocity on the intake side matters, and when drainage channels, drip edges or water-repellent Renson ventilation grilles such as types 450, 450V, 452, 412 or rotec W11 are appropriate.
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Ventilation and solar shading for data centres (2026): Reliable airflow, night cooling and energy efficiency
Ventilation and solar shading for data centres must meet safety, energy-efficiency and specification requirements. rotec supports architects, specialist designers, facade contractors and main contractors with technical advice, burglar-resistant ventilation grilles, weather louvres, solar shading louvres, floor grilles and project-specific manufacturing in Berlin.
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Planning Renson acoustic louvres correctly (2026)
Renson acoustic louvres provide a technical solution for facades, plant rooms, rooftop structures and enclosures, data centres, industrial buildings and car parks where airflow, screening, weather protection and sound insulation must be planned together. This technical article compares the Renson Linius acoustic louvres L.060AC, L.150ACS, L.150ACL, L.170ACS and L.170ACL. It explains sound insulation values, free area, K-factors, applications, installation guidance and common planning mistakes. It also describes how rotec supports technical coordination, advice, supply and installation. The article is intended for architects, design practices, building services engineers, facade contractors, metal fabricators, industrial businesses and building owners looking for a suitable louvre solution for technical building openings.
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Renson ventilation grille 411: Planning, specifying and configuring rotec W11 online (2026)
The Renson 411 ventilation grille corresponds to the rotec W11 ventilation grille. This article covers technical data, installation frames, free area, weather protection, installation, specification text, CAD downloads and the rotec online configurator. It also explains how rotec supports architects, designers, metal fabricators and industrial businesses with ventilation grilles, roof hoods and technical building openings.
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Renson ventilation grille configurator 2026: How rotec W11, W12 and other types correspond to Renson models
The rotec Renson ventilation grille configurator makes it easier to identify the corresponding grille types in the new shop. This article explains why rotec W11 corresponds to Renson type 411, how the W-series naming system works, and what designers, metal fabricators and technical buyers should consider when selecting ventilation grilles and weather louvres. It also shows how established Renson louvre profiles can be combined with custom manufacturing in Berlin, direct configuration and personal technical advice.
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Planning smoke extraction hoods and ventilation hoods for underground car parks and roof shafts
Further roof solutions for daylight, ventilation and smoke and heat exhaust. In addition to smoke extraction hoods, flat roofs can incorporate rooflights for daylight, ventilation, roof access or smoke and heat exhaust. Our article on configuring and comparing flat-roof domes online helps with product selection and technical assessment. Natural ventilation of underground car parks uses openings or ventilation shafts for air exchange. Wind pressure, thermal buoyancy and pressure differences move the air, so a continuously running fan is not required to generate airflow. However, this solution is not automatically suitable for every car park. Size, use, traffic volume, geometry and state building regulations determine the requirements. The openings must also be sufficiently large, appropriately distributed and...
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Acoustic louvres for plant rooms, rooftop installations and car parks
Acoustic louvres for plant rooms, rooftop installations, air-conditioning equipment and car parks. rotec supports airflow design, noise control and planning.
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Skylights for Flat Roofs: Selection, Prices, and Renovation for Industry Professionals
At rotec, you no longer buy skylights for flat roofs based on a hunch, but rather on clear technical criteria and transparent prices. In this article, you’ll learn how to compare around 60,000 fully priced configurations in the rotec online store, what role the number of shells, the mounting ring, and accessories play, and how to seamlessly integrate features like smoke and heat exhaust ventilation (RWA) and roof access into your roofing design. You’ll also receive a practical checklist, learn about common planning mistakes, and get specific tips on how to select the right skylight for new construction or renovation projects.
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Acoustic louvres on a high-rise building in Berlin City West | rotec
Project report from Berlin City West: rotec manufactured and installed acoustic louvres for the rooftop equipment of a high-rise building on Budapester Straße. Includes original photographs, Renson data and planning guidance.
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