Suspended particles in the air are for the most part invisible at first sight. Suspended particles mostly collect where there is build-up of air, e.g. under cupboards or under beds.
The dirt particles get partially caught in modern office equipment and form a breeding ground there.
The air is sucked through the dust filter and is then freed from dust, airborne particles and dirt.
The suspended particles that are left behind can no longer fly around in the air. At the same time, the filter prevents the device from getting dirty.