To ensure constant hygiene and minimal dust build up (especially with hazardous dusts), a central vacuum cleaning system is normally designed and put in place.
A proper central vacuum cleaning (CVC) system takes into consideration the dust loading, number of suction points active at one time etc. while also considering the locations of the dust collector, hazardous dust implications and so on.
Sometimes this central vacuum seize to work becasue of some blockage or dirt or something similar. TC air duct cleaning helps you to clean up your blocked central vacuum.