The extraction system on powder coating booths has begun. The circular filter is made of painted carbon steel. The extraction of the filtering units is at the top of the filter, which is accessible by a ladder, and where it is possible to make collections from the chimney and carry out maintenance on the compressed air tank and electro valves used for washing. The door for extracting the dust is at the lower part of the filter. The piping is made of galvanised carbon steel sheet.