ISO 14644 Cleanroom Classification Chart & ISO Class Air Changes per Hour (ACH)
Understanding ISO 14644 cleanroom classification is crucial for maintaining proper contamination control levels in sensitive manufacturing environments. Our comprehensive ISO 14644 chart helps you determine the right Air Changes Per Hour (ACH) requirements for different ISO classes in pharmaceutical, semiconductor, and life science facilities.
ISO 14644-1: The Global Standard for Cleanroom Classification
- Detailed Tiered System: Defines ISO classes from 1 to 9, with ISO Class 1 representing the strictest contamination control environment
- Particle Concentration: Based on airborne particulate matter counting (particles ≥0.1 μm)
- International Recognition: Widely adopted across automotive, aerospace, pharmaceutical, and semiconductor industries
- Regulatory Alignment: Supports compliance with FDA cGMP (21 CFR Part 211), EU GMP Annex 1, and ISO 14644-4
ISO Class & Air Changes Per Hour (ACH)
The relationship between cleanroom classification and air changes per hour is critical for maintaining proper contamination levels. Our detailed chart shows the required ISO Class Air Changes per Hour (ACH) for each classification:
| ISO Class | Airborne Particulate Matter (≥0.1 μm) | Recommended Air Changes Per Hour (ACH) | Common Applications |
|---|---|---|---|
| ISO Class 1 | ≤ 10 particles / 100 cubic feet | 100-150 ACH | Ultra-sensitive research laboratory work |
| ISO Class 2 | ≤ 100 particles / 100 cubic feet | 90-120 ACH | Advanced semiconductor fabrication |
| ISO Class 3 | ≤ 1,000 particles / 100 cubic feet | 80-100 ACH | Detailed semiconductor processing |
| ISO Class 4 | ≤ 10,000 particles / 100 cubic feet | 60-80 ACH | Microwave and LED manufacturing |
| ISO Class 5 | ≤ 100,000 particles / 100 cubic feet | 45-60 ACH | Primary sterile product manufacturing |
| ISO Class 6 | ≤ 1,000,000 particles / 100 cubic feet | 30-45 ACH | Secondary sterile processes in pharmaceutical industry |
| ISO Class 7 | ≤ 10 million particles / 100 cubic feet | 20-30 ACH | Fill-finish operations and assembly areas |
| ISO Class 8 | ≤ 100 million particles / 100 cubic feet | 15-20 ACH | General cleanroom operations and prototyping |
Farclean’s Expertise in Cleanroom Design
At Farclean, we understand that proper cleanroom classification directly impacts product quality and compliance. Our team of experts provides comprehensive cleanroom design services, including:
- Customized Solutions: Tailored cleanroom door and wall panel configurations to meet specific ISO class requirements
- Optimized Airflow: Advanced computational fluid dynamics (CFD) analysis to ensure optimal air distribution and contaminant control
- Material Selection: High-performance materials that meet or exceed ISO 14644 standards for low particle shedding
- Verification & Validation: Comprehensive testing to confirm compliance with required air changes per hour specifications
Our cleanroom door selection includes options designed specifically for high-efficiency cleanroom environments, featuring advanced sealing and easy operation to minimize disruptions to air containment.
Similarly, our modular wall panels provide seamless integration into cleanroom designs, maintaining positive pressure differentials crucial for preventing contamination across all ISO classes.
Whether you’re navigating the complexities of ISO 14644 standards or implementing specific air changes per hour requirements, Farclean provides expert engineering support to ensure your cleanroom facilities meet the highest industry standards.
