With 100 km of cable ducts, we have saved +/- 750,000 kg of CO2 in 20 months!
What an achievement! Thanks to our Circulartube with KIWAGREEN certification and the efforts of our business partners, 100 kilometers of sustainable tubes have been successfully installed.
A word of thanks to our partners!

Tubefinder the visionaries - Mr. Gerben Borger Managing Director of Tubefinder in Amersfoort NL had the idea for a high-quality, sustainable product in 2020. The idea of Circulartube was born!

Alliander as a pioneer - Alliander was the first network operator to approve our Circulartube for use in all its projects. Their vision and courage make them a pioneer in the industry. Many thanks to the Alliander team for their trust!
KIWA sets standards - The KIWAGREEN certificate proves that our pipes are durable and of high quality. Kiwa helps to raise the bar so that we avoid greenwashing and make a real impact. 
What does this mean for you? Circulartube is not just an alternative; it's the new norm. We invite you to join us in the move away from fossil fuels and make the switch to a future-proof infrastructure.
Would you like to know how our Circulartube can strengthen your projects?  Contact us and discover the possibilities.

The company will be closed from 23.12.204 to 03.01.2025 inclusive. The last loading day this year is 17.12.2024. We ask you to take this into account when making deliveries and placing orders and would like to thank our business partners for a successful 2024!

Hendrik Hundhausen joined our team on July 1, 2024 and is responsible for strategic purchasing, energy and environmental management. Hendrik heralds the age of the 3rd generation in the family business. Before joining Hundhausen, Hendrik worked for the Gesellschaft für Internationale Zusammenarbeit (GIZ) GmbH. During his almost 7 years at GIZ, Hendrik worked and lived in Kampala, Uganda until the end of 2020, where he was involved in the implementation of solar island grids as part of the "DKTI Pro-Mini Grids" project. Back in Germany, Hendrik worked in the BMWK's project development program until the end of 2023. The focus was on the project planning of solar rooftop systems for industrial companies in Jordan, Kenya, Rwanda and Uganda.