Different industries require different levels of cleanliness. Purification workshops and dust-free workshops can be applied in industries such as microelectronics, semiconductors, food, cosmetics, medical devices, pharmaceutical factories, and so on.

The air cleanliness level of the purification workshop is divided into many levels, namely level 10, level 100, level 1000, level 10000, level 100000, and level 300000. The smaller the value, the higher the cleanliness level and the higher the requirements for construction. But it's not that higher cleanliness is better, the key still depends on the specific production process requirements, and what is suitable is the best.

There are also many standards for the design of dust-free workshops. For example, in terms of structure, it is necessary to consider the changing room, lounge, management room, and cleaning room, all of which should achieve a dust-free and sterile effect. The method of airflow and the number of air changes can change the cleanliness of the purification workshop, and the specific setting should be determined based on the job content and product. Some operations that are prone to generating dust should be placed below the airflow to avoid affecting the cleanliness of other spaces through the airflow. When carrying out purification projects, it is necessary to do a good job in exhaust work to expel dust and bacteria. At the entrance of the purification workshop, it is necessary to set up an air shower room to reduce personnel entering the clean room and bringing dust and bacteria into it. In addition, the temperature, humidity, and pressure difference in the dust-free workshop should also be set according to regulations.