From the best idea to the living experience – competent advice and detailed planning

Your order to us sends a clear message: innovative architecture. We develop an idea to suit you – and only you. We provide extensive advice and support to ensure that you receive a product which is tailored perfectly to your needs and wishes. From the inspiration via the presentation of possibilities, 3D visualisation, layout and product solutions to the finished living experience.


Some customers know exactly what they want. Others are inspired by photos of other projects which help them to define their style and design specifications more clearly. Check out the Gallery on our website and also on the individual product pages for photographs of a few among many projects we have completed around the world.

You can also find our current catalogue in the “Download” menu. We shall be happy to send you our image brochure as well. We design and build exclusive home conservatories and window systems which are designed specifically for your property and your lifestyle.

We recommend to visit our exhibition or one of the Keller minimal windows® Partners in your area to experience the design, execution, quality and fittings at first hand.


With us, your building project is in experienced hands from start to end.




Advice & quote

Your personal contact will support you right from the start. We want to give you optimum advice and support so that you get the minimal window or door system that you actually need. Technical structural circumstances, the site and your personal requirements and expectations are all covered in the consultation. Your project is then developed based wholly on your specifications and preferences. In the first implementation phase, suitable materials are selected, lighting concepts are developed and construction methods are optimised. Once all the details have been finalised and all parameters selected, we produce your personal quote. Our designers produce photo-realistic 3D renderings of your building project.


After the technical development and production of detailed building plans, the factory receives the production order. In a state-of-the-art machine park, 5-axis CNC machines deliver ultra-precise production results. The experience and expertise of our employees ensure the perfect progression of the building project. To guarantee quality control, all constructions are assembled in the production halls in TROISVIERGES (L) before they are fitted in situ – customer satisfaction is the key factor at all times.



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