difference between ISO 8 clean room, ISO 7 clean room, and ISO 5 clean room

ISO clean rooms are classified based on the cleanliness level of the air within them, as defined by the International Organization for Standardization (ISO). The classifications are determined by the number and size of particles permitted in the air. Here’s a breakdown of the differences between ISO 8 clean room, ISO 7 clean room, and ISO 5 clean room:

ISO 8 Clean room

1. Maximum Particles per Cubic Meter:
2. 3,520,000 particles ≥ 0.5 micrometers
3. 832,000 particles ≥ 1.0 micrometers
4. 29,300 particles ≥ 5.0 micrometers
5. Typical Uses: Suitable for industries where moderate levels of cleanliness are acceptable, such as food processing, assembly of electronic components, and some pharmaceutical applications.
6. Air Changes per Hour: Generally requires 10-25 air changes per hour.

ISO 7 Clean room

1. Maximum Particles per Cubic Meter:
2. 352,000 particles ≥ 0.5 micrometers
3. 83,200 particles ≥ 1.0 micrometers
4. 2,930 particles ≥ 5.0 micrometers
5. Typical Uses: Commonly used in pharmaceuticals, biotechnology, and electronics manufacturing where a higher level of cleanliness is necessary.
6. Air Changes per Hour: Typically requires 30-60 air changes per hour.

ISO 5 Clean room

1. Maximum Particles per Cubic Meter:
2. 3,520 particles ≥ 0.5 micrometers
3. 832 particles ≥ 1.0 micrometers
4. 29 particles ≥ 5.0 micrometers
5. Typical Uses: Ideal for critical applications such as semiconductor manufacturing, sterile pharmaceutical compounding, and certain medical device manufacturing.
6. Air Changes per Hour: Generally requires 100 or more air changes per hour.

Summary of Differences

1. Cleanliness Level: ISO 5 clean room is the cleanest, followed by ISO 7 clean room, and then ISO 8 clean room.
2. Particle Count: The allowable particle count decreases from ISO 8 clean room to ISO 5 clean room, indicating a higher level of cleanliness in ISO 5 clean room.
3. Applications: The choice of cleanroom class depends on the specific requirements of the process or product being manufactured, with ISO 5 clean room being suitable for the most sensitive applications.