Home conservatories and windows from KELLER – for a lifetime

The customers of KELLER AG expect their purchased home conservatories and window systems to function just as well and provide the same pleasure even after many years. To meet this objective we select only materials and components which correspond to high quality standards and which are long-lasting. In our factory at Troisvierges in Luxembourg we pay attention to the smallest details and perfect finish. We use only high-quality aluminium and high-strength materials to ensure that you remain happy with our products for many years. As well as our modern machine park, the knowledge and experience of our employees is essential. Many processes are still performed by hand in order to ensure the high quality standards.

Made in Luxembourg

KELLER has been manufacturing in the north of Luxembourg since 1990 and in 1994 we were awarded the “Made in Luxembourg” label. All phases of work, from development and planning via manufacture to assembly are performed in-house.

What started as a small operation is now a globally-operating company with more than 70 business partners. One thing has stayed however unchanged – the quest for absolute perfection and top quality. And it is our customers, their wishes and needs, who are at the centre of everything we do.



Fully preassembled

We use only the highest-quality aluminium profiles which have been extruded especially for our product lines and we work with trusted partners and suppliers to ensure that the products made in our factory are of absolutely top quality. Every home conservatory is fully preassembled and tested at the factory before it is delivered to its future owner. New product series and components are exhaustively tested and optimised before they find their way to our customers.

Lifelong service

The assembly, final inspection and handover of a KELLER conservatory or of a KELLER minimal windows® design sliding window system is not the end of our relationship with our customers. In order that you get the maximum possible pleasure from your investment, we do offer lifelong service.



Absolute top quality

Our customers want a product of exclusive quality. Every construction is made-to-measure with high quality aluminium profiles which are processed with the utmost precision.  We add our extensive expertise which is based on 30 years of experience. Thus with every product from KELLER you get the best quality, the longest service life and the best service. Every KELLER design is an investment for life.



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