When welding stainless steel, not only welding fumes are released, but also warm air that would normally be lost. Instead of simply exhausting this heat, we developed a system that recovers and reuses the energy. This ensures a well-ventilated workspace without unnecessary heat loss. In addition, the installation was designed to be flexible — the extraction system for 17 workstations automatically adjusts to the number of active stations.
How does the system work?
In collaboration with Miltech, we installed a heat recovery system that includes:
✅ A Sult filter unit that efficiently captures welding fumes.
✅ An extraction fan that removes contaminated air.
✅ Two plug fans that blow clean air back into the workspace.
✅ A heat exchanger that uses the exhausted heat to preheat incoming air.
✅ Valves combined with a control system to maintain optimal balance between extraction and supply, regardless of how many workstations are in use.
What are the benefits?
Thanks to this system, approximately 16,000 m³/h of air is refreshed without significant energy loss. This ensures a healthy working environment and a lower energy bill. Additionally, the installation automatically adapts to the situation, so air is never extracted in excess of what is needed.
The challenge
The client wanted to replace an outdated filter unit with a fully functional air handling unit. Key requirements included:
The solution
We designed a sound-optimized, custom air handling unit with vertical intake and horizontal discharge. The system consists of three separate components and is engineered for easy on-site assembly.
Key specifications
This project demonstrates how we don’t just supply fans, but engineer complete air solutions — efficient, space-saving, and fully tailored to the customer’s needs.
