What is ISO 14644?
ISO 14644 is the international standard that defines cleanroom classification based on airborne particle concentration. Understanding these classifications is essential for manufacturers who need to maintain controlled environments.
The 9 ISO Classes
ISO cleanrooms are classified from ISO Class 1 (most strict) to ISO Class 9 (least strict):
- ISO 1-3: Used in semiconductor manufacturing and advanced research
- ISO 4-5: Pharmaceutical manufacturing, medical device assembly
- ISO 6-7: Electronics manufacturing, food processing
- ISO 8-9: General manufacturing, office environments
Key Metrics
Cleanroom classifications are determined by:
- Particle count: Number of particles ≥0.5 microns per cubic meter
- Air changes per hour: How frequently the air is exchanged
- Pressure differential: Maintaining positive or negative pressure
- Temperature and humidity control: Critical for precision manufacturing
Choosing Your ISO Class
The right ISO class depends on your manufacturing process. More restrictive classes cost more but provide superior product quality and regulatory compliance. TFE Cleanrooms helps you balance compliance requirements with budget constraints.
FDA GMP Requirements
For pharmaceutical manufacturing, the FDA typically requires ISO 5 or better for sterile product manufacturing. Understanding these requirements early ensures your cleanroom investment protects your operations from regulatory risk.