Ludwigsburg / Düsseldorf (Germany), September 19, 2025
The future collaboration sends a clear signal for growth and quality, combining strong talent development, consistent customer focus, and future-proof technologies—hallmarks of the bluu unit alliance. It brings together regional champions actively shaping the transition driven by F-gas regulations and the shift toward natural and sustainable refrigerants.
With over 300 employees, including more than 60 apprentices, revenues of more than EUR 80 million, three locations in Düsseldorf, Cologne, and Stuttgart (Ebersbach an der Fils), and nearly four decades of experience, KKL is a well-established player in the industry. KKL manages projects across all industries—with a strong focus on data centres. The company’s service portfolio covers a wide range of modern refrigeration and air conditioning technologies. While the alliance leverages its strength in sustainable technologies, a broad service portfolio, and a nationwide network, KKL contributes valuable expertise in training, paired with high quality standards and close customer relationships—values shared by bluu unit.
KKL’s nationally largest training centre for refrigeration and air conditioning technology, with a 100% graduation rate, makes it a lighthouse of talent development in the industry.
Since 2016, Patrick Peters and Ingo Hoffmann have jointly led KKL Holding GmbH, forming a seasoned duo now guiding the company into its next growth phase.
By joining forces with KKL Holding, bluu unit reinforces its ambition to elevate the refrigeration and air conditioning sector to a new level. This move not only boosts joint innovation capabilities but also sends a strong message in favour of sustainable and forward-looking solutions in building technology.