The minimal windows® frameless sliding windows system was developed by KELLER AG in Luxembourg. The system represents a complete proprietary development of all components and has been awarded the quality label "Made in Luxembourg". Numerous international awards testify to the worldwide recognition of our products.


Registred office & factory

38-40, route de Wilwerdange
9911 Troisvierges
Phone +352 97 80 21-1
Fax +352 97 80 23


2400 m² SHOWROOM - Opening times

Mon -Thu : 8 am to 6 pm
Fri : 8 am to 5 pm
Sat: 9 am to 4 pm

or upon agreement

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Precision and Perfection - “made in Luxembourg”

KELLER AG manufactures with over 100 employees on a production area of 7,000 m² in Troisvierges, Luxembourg.
KELLER impresses by its unmistakable design and by the quality of the manufacturing. All phases of the work, from development and planning through to manufacture are performed in-house and are the reason for the company's excellent image.

The family-led company also enjoys a good reputation internationally as a manufacturer of exclusive premium home conservatories such as the KELLER Orangerie or the KELLER GLASSHOUSE®.
A further milestone was set in the company's history with the development of the minimal windows® sliding window system.


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