Keller minimal windows® is a worldwide leading designer and manufacturer of innovative, high-quality, and almost frameless aluminum window and door systems.

Our success is based on 15 years of experience in the luxury segment. We develop tailor-made solutions that bring architectural visions to life all over the world. Our goal is to achieve perfection and meet the most extreme and demanding requirements. We strive to push architectural boundaries while providing reliable and long-lasting functionality.

Since 2020, we have been part of the AluK Group. AluK is a global leader in the design, construction, and distribution of aluminum windows, doors, and facades. As an internationally active and experienced professional manufacturer of aluminum building systems, we have preserved the positive attributes of a proud family business. We combine expertise and business experience with strong financial security.

Although we offer global service, we firmly believe that a personal touch is essential for success. We have maintained the flexibility of a small company. All our products are individually designed and manufactured in our production facility in Luxembourg, in the heart of Europe.

Assembly is carried out by our exclusive network of trained and qualified partners on various continents. The dedicated product team of Keller minimal windows® strives to understand both your requirements and your vision. We always deliver tailor-made solutions perfectly aligned with your projects and the markets you serve.

Local Architectural Contact: Stefan Goebel, 857.294.7768 (Goebel Consulting Group),

Local Installation Partner: Austin Retrofit, Stevie Laube,, 512.926.6665,