The CleanAirTower hall ventilation and room ventilation is used wherever point extraction of welding fumes is not sufficient. The tower effectively protects employees and machines from fine dust during welding. The cleaned air is fed back into the room. The new optimised air flow has a special effect and, similar to the principle of the pinball, ensures that possible sparks and particles collide with metal sheet elements at 10 or more points, thus effectively removing energy from them. The hall ventilation causes only minimal air turbulence, which is why the polluted air does not reach unpolluted areas.