The suspended pollution generated by personnel and processes can be immediately removed by this air, while the turbulent ventilation system adopts the principle of mixing and dilution. In an empty room without any obstacles, unidirectional flow can quickly remove pollutants with much lower wind speeds than previously mentioned. But in an operating room, the machine and the people walking around it can create obstacles to the airflow.

The main feature of turbulent flow clean room is that the flow cross section of the air flow from the beginning to the outlet (from the air supply outlet to the air return outlet) is variable. The clean room cross section is much larger than the air supply outlet cross section, so it can not form uniform air flow in the whole room cross section or in the whole room working area cross section.

A dust-free clean room is a specially designed and built dust-free clean room that removes pollutants such as particles and bacteria from the air within a certain range of space, and controls the indoor temperature, cleanliness, indoor pressure, airflow speed and airflow distribution, noise, vibration, lighting, and static electricity within a certain range of demand.