During steel processing in a Slovenian steelworks, the addition of a substance to the boiling steel produces a jet flame about 3 m high, together with a strong cloud of smoke. An extraction system with a downstream filter unit should be the remedy. As if that were not enough, the solution used had to withstand 700°C for a short time, as well as a negative pressure of 3,000 Pa and a fan output of 70,000 m³/h. The solution we developed meets the requirements and represents a significant improvement in the working environment. More information on this project is available on request.