Focuses On Professional Cleanroom Project And Pharmaceutical Cleanroom Equipment.
As technology advances, the demand for cleanrooms in various industries continues to rise. Cleanrooms are essential for ensuring the integrity of products and processes in fields such as pharmaceuticals, biotechnology, electronics, and aerospace. One crucial aspect of cleanrooms is their classification according to ISO standards. In this article, we will take a deep dive into various ISO cleanroom classifications to understand their differences and applications.
ISO 1 Class Cleanrooms

Cleanrooms classified as ISO 1 are the most stringent in terms of cleanliness. These cleanrooms are designed for highly sensitive processes that require an extremely low level of particles in the air. ISO 1 cleanrooms are typically used in industries such as semiconductor manufacturing, nanotechnology research, and aerospace engineering. To maintain the cleanliness level of an ISO 1 cleanroom, special attention must be paid to air filtration, gowning procedures, and equipment handling.
ISO 5 Class Cleanrooms
Moving down the ISO classification scale, ISO 5 cleanrooms are still considered very clean environments. These cleanrooms are suitable for industries like pharmaceutical manufacturing, medical device assembly, and biotechnology research. While not as stringent as ISO 1 cleanrooms, ISO 5 cleanrooms require strict control over airborne particles and microorganisms. Proper cleaning and disinfection protocols are crucial in maintaining the cleanliness of an ISO 5 cleanroom.
ISO 7 Class Cleanrooms
ISO 7 cleanrooms offer a lower level of cleanliness compared to ISO 5 cleanrooms but are still suitable for many manufacturing processes. These cleanrooms are commonly used in industries such as automotive manufacturing, food processing, and optics. ISO 7 cleanrooms can accommodate a higher level of airborne particles, but proper ventilation and filtration systems are necessary to meet the required cleanliness standards. Regular monitoring and maintenance are essential to ensure the cleanliness of an ISO 7 cleanroom.
ISO 9 Class Cleanrooms
At the bottom of the ISO classification scale, ISO 9 cleanrooms are the least stringent in terms of cleanliness requirements. These cleanrooms are typically used in industries where a controlled environment is necessary but the level of cleanliness does not need to be as high. ISO 9 cleanrooms can be found in applications such as packaging, warehouse operations, and some general manufacturing processes. While ISO 9 cleanrooms have a higher tolerance for airborne particles, regular cleaning and maintenance are still essential to prevent contamination.
ISO Cleanroom Classifications in Practice
In practice, cleanroom classifications are not always as straightforward as the ISO standards suggest. Many industries may have specific requirements that fall between two ISO classes or require additional controls to meet their cleanliness needs. For example, some industries may require a cleanroom with ISO 5 cleanliness but also need to control humidity levels or static electricity. In such cases, custom cleanroom designs and additional measures may be necessary to meet the specific requirements of the industry.
In summary, understanding the various ISO cleanroom classifications is crucial for maintaining the integrity of products and processes in industries where cleanliness is essential. Each ISO class has its own set of requirements and applications, and selecting the right cleanroom classification is vital for ensuring optimal performance and safety. By adhering to the cleanliness standards outlined in the ISO classifications and implementing proper maintenance protocols, industries can create controlled environments that meet their specific needs and regulatory requirements.