The dosing station ensures the addition of sorbent to the extraction line, which has a positive effect on the regenerability of the filter media. Especially in welding shop exhaust systems where evaporated oil is extracted together with dust particles and smoke. It is the oil trapped in the filter media that causes high pressure loss, low filter media life and premature filter cartridge replacement. The sorbent, mainly Ca(OH)2 and CaCO3, holds the oil particles and significantly increases the regeneration efficiency. After regeneration of the filter media, it is then separated together with the trapped dust into the collection vessel of the filter system. The filtration system operates at lower pressure losses which has a positive effect on the power consumption of the extraction fan. Another significant benefit of sorbent dosing is the reduction of the risk of the filter media catching fire.