Modular cleanrooms are essential in environments where airborne particles can compromise cleanliness, product quality, research accuracy, or patient safety. For organisations in pharmaceuticals, life sciences, biotech, and advanced manufacturing, understanding your required cleanroom classification is the first step in choosing the right controlled environment.
This guide provides a quick breakdown of ISO cleanroom classifications. It explains how Modular Clean Air’s Series 1, Series 2, and Series 3 modular cleanrooms provide compliant, high-performance solutions delivered far faster than traditional builds.
Why Cleanroom Classification Matters
Cleanroom classifications indicate the maximum number of airborne particles permitted in a controlled space. The higher the required level of cleanliness, the stricter the classification. Many critical processes, such as aseptic manufacturing, sterile filling, and sensitive research, can only be performed within specific ISO conditions.
What Is the ISO Standard for Cleanroom Classification?
The ISO standard for cleanroom classification is ISO 14644-1:2015. This standard categorises cleanrooms according to the concentration of airborne particles present in a cubic meter of air.
Lower the ISO class number = cleaner environment.
Quick Reference Guide to ISO Cleanroom Classifications
ISO is globally recognised and used across pharma, biotech, microelectronics, and advanced research facilities. Understanding ISO cleanroom classifications is essential for maintaining appropriate environments in industries where contamination control is critical.
The classification scale ranges from ISO Class 1, representing the highest cleanliness with the fewest particles, to ISO Class 9, indicating lower cleanliness levels.
| ISO Class | Maximum particles per m³ (≥0.5 µm) |
| ISO 1 | 10 |
| ISO 2 | 100 |
| ISO 3 | 1000 |
| ISO 4 | 10,000 |
| ISO 5 | 100,000 |
| ISO 6 | 1,000,000 |
| ISO 7 | 3,520,000 |
| ISO 8 | 35,520,000 |
| ISO 9 | 352,520,000 |
ISO Class 1–3: Ultra-Clean
- Used in nanotechnology and advanced electronics.
- Extremely low particle limits.
ISO Class 4–5: High-Level Cleanrooms
- Typical for aseptic pharma manufacturing (e.g., injectables).
- Suitable for sterile medical device assembly.
ISO Class 6–7: Controlled Clean Manufacturing
- Found in pharma packaging, biotech labs, and clean assembly areas.
- Suitable for processes requiring consistency but not aseptic conditions.
ISO Class 8–9: Controlled Support Areas
- Used for prep rooms, gowning areas, and non-critical manufacturing stages.
- Often support higher-grade zones in a cleanroom suite.
How Modular Clean Air Cleanrooms Support ISO Compliance
Modular Clean Air (MCA) solves this with our series of precision-engineered cleanroom designs manufactured off-site, fully compliant with ISO 14644 and GMP, and meeting cleanroom classification standards with complete contamination control. This approach delivers the permanence and performance of a conventional facility in a fraction of the time.MCA’s cleanroom solutions can be installed almost anywhere, from car parks to brownfield sites, all without compromising quality.
Series 1, Series 2, and Series 3: Fast, Compliant, Modular Cleanroom Solutions
Series 1 Cleanroom — Self-contained, Fully Controlled
- A containerised Series 1, single-storey cleanroom environment.
- Manufactured off-site cleanroom solutions and delivered ready for installation.
- Fully compliant cleanroom installation with building control and fire regulations.
- Ideal for rapid deployment, small-scale production, sample analysis, or early-stage R&D.
Series 2 Cleanroom — Mobility Meets Compliance
- A purpose-built, relocatable Series 2 modular cleanroom with the permanence of a conventional build.
- Manufactured off-site cleanroom to GMP standards and building regulation compliance.
- Offers rapid deployment while maintaining high performance.
- Suitable for pharmaceutical manufacturing, biotech labs, and specialist clean processes requiring specific ISO classifications.
Series 3 Cleanroom — Innovation at Industrial Scale
- Our Series 3 modular cleanroom is a large-scale, multi-storey modular cleanroom solution engineered for high-capacity operations.
- Manufactured off-site to the same precision standards as Series 1 and 2, ensuring full ISO 14644 and GMP compliance.
- Delivers permanent-quality infrastructure with significantly reduced build times compared to traditional construction.
- Ideal for industrial-scale pharmaceutical production, advanced manufacturing, and large research facilities requiring extensive, precision-controlled environments.
During the COVID-19 pandemic, the need for speed became critical. MCA and Total Clean Air demonstrated this by delivering a 2,700 sqm cleanroom in under 12 weeks—proof of the speed and reliability behind modular cleanroom construction.
Why Modular Cleanrooms Matter for Modern Laboratories and Manufacturers
As MCA’s leadership explains:
“R&D, biotech, and pharmaceutical production depend on the availability of fast, compliant facilities”.
“Delays in cleanroom construction slow drug development, testing, and manufacturing cycles”.
“Off-site modular manufacturing removes these bottlenecks”.
With backing from Total Clean Air and Vanguard Healthcare Solutions, MCA combines deep technical expertise, strong financial stability, and proven healthcare-grade infrastructure delivery.
Why Modular Cleanrooms Matter for Modern Laboratories and Manufacturers
Whether you need a self-contained controlled environment with a rapid-deployment module or a high-performance, GMP-ready cleanroom, MCA provides modular cleanroom solutions that meet all ISO cleanroom standards, with accelerated timelines that don’t compromise compliance and cleanliness.Speak to our experts to explore which cleanroom environment is right for your ISO classification and operational needs.
