| Views:802
zoomiconRenson 411 ventilation louvre celebrates 50th anniversary with upgrade

Renson 411 ventilation louvre celebrates 50th anniversary with upgrade

50 years’ experience in technical ventilation louvres


While Renson has since made its mark in many fields as an international trendsetter in ventilation, sun protection, and outdoor living, it still excels in what this Belgian family business first launched 50 years ago: ventilation louvres. To mark the occasion, Renson is going all out with an upgrade of the first louvre it ever produced, which continues to prove its worth to this day.

» Revolutionary louvre

411 is the name of the party animal blowing out 50 candles this year. Renson revolutionised the field of natural ventilation in the 1970s with this louvre, made up of L.033.01 blades. They were the first ventilation louvres in which the blades were clipped in rather than welded or affixed with rivets. At that time, it was a revolutionary step forward in the field of louvre production.

» 411 louvre marks the occasion with an upgrade

It’s the L.033 blades (also used in the 414 and 431 louvres and bladed walls which followed later) that will be upgraded. These louvres can now boast a free airflow of 50% rather than 45% and an air permeability upgrade from class 4 to class 3. This has no impact on the method of installation and the other components of these louvres, but it does create a ventilation louvre that can meet the requirements of the year 2020 even better.

» Renson and ventilation louvres: a successful marriage of 50 years

Renson’s continued status as an international trendsetter in the field of ventilation louvres is due first and foremost to the enormously wide scope of applications for this product range. Our range includes not only wall louvres, but also surface-mounted, window, door, and floor louvres. And they’re all available in every possible size, shape, and colour. 

As most ventilation louvres also remain visible in the shell of a building, Renson pays a great deal of attention to their aesthetic aspect: impeccable coatings, no visibility when looking perpendicular to the louvre, no water damage due to good drainage, and a completely rust-free and durable finishing in aluminium contribute to the foundation of its success.

Renson ventilation louvres also stand out on a technical level. To this day, the combination of air permeability and water resistance is continually being optimised for the entire range. This results in an extensive range of louvres which can meet a wealth of technical requirements: from acoustic attenuation, burglary prevention, water resistance, and fall-through safety to fire resistance, thermal sealing, and specific filter properties. This is all owing to the continued investment in research and development and the objective testing programmes carried out by independent institutes on each of these types of ventilation louvres. Quality you can always count on.

50 years of ventilation louvres: the evolution 


In the 1970s, Renson launched the very first 411 louvre with aluminium clips blade (L.033.01) for in-wall mounting. It was a first because the blades had always been mounted in the louvre frame with rivets or welding up to that point. The 411 was followed by the 414 and 431 louvres built with the same type of blade, but with a different frame for the window and surface-mounting, respectively.

For Renson, the 1980s represented various innovative developments in the field of louvres. Lockable louvres made their appearance, along with louvres with movable blades (427), and tablet and floor louvres. With the 425 louvre, there was now also a version with a larger ‘blade pitch’ (of 95 mm) in the pattern of the clipped-in blades, and the ‘421′ was a heavier version with larger blades. When data centres and electrical boxes first appeared on the radar, Renson specifically began developing stick-proof/water-resistant louvres (412).

From the 1990s onwards, Renson dedicated itself to the so-called construction cabinet system in the field of louvres, in which local partners follow a thorough training for the independent assembly of a number of popular louvres from the Renson range. It was a wise move by Renson, as it enabled a significantly faster response to market demand. The service was well received by many customers all over the world. At the same time, Renson’s international growth as a company enabled it to specialise and to respond better to specific market demands in the field of R&D and pre-sales. 

Since then, Renson has been contributing actively and with solution-focused collaborations with customers to offer the appropriate louvre for each application. This customer-focused thinking resulted in louvres that were originally developed for specific projects that eventual become ripe for introduction in the standard range. The exemplary projects listed below are proof of this.

Now, in 2020, the first series of louvres (411, 414, 431) which started it all 50 years ago will be equipped with newly developed L.033.01 blades. This new step forward in the field of air permeability ensures that Renson is still a pioneer in the field of ventilation louvres. Their extensive experience and close connection with market trends, together with the vast internal know-how and R&D capacity, mean that Renson is now able to meet the most specific wishes in the production of ventilation louvres, both technically and in terms of design. 


Strona używa Cookies. Więcej w Polityce Prywatności.