VENTAFLEX
Efficient, pre-insulated air-duct systems that meet the highest hygiene standards.

Based in Altenberge (North Rhine-Westphalia), VENTAFLEX GmbH & Co. KG is a specialist manufacturer of pre-insulated air-duct systems for ventilation and air conditioning, produced from polyurethane (PUR) using its proprietary, patented Rotafusion process. For more than 35 years, industrial, commercial and municipal buildings across Germany and beyond have relied on Ventaflex for superior energy efficiency, fast and cost-efficient installation thanks to the components’ exceptional lightness, and the highest hygiene standards — a critical factor in ventilation.
Two product lines cover different installation situations: VENTAFLEX for above-ground installation in rooms, on facades and roofs, and LAVANTUS for underground burial.
For Cornus, Ventaflex is a textbook fit: deep technical know-how in a growing niche with regulatory tailwinds, a culture of constant innovation, a loyal customer base built over more than three decades, and a capital-efficient production process that is hard to replicate. Exactly the kind of industrial Mittelstand we back for the long term and support as it grows.
