ISO classifications are international guidelines developed to ensure that specific controlled spaces maintain low levels of airborne particles. These controlled spaces, known as cleanrooms, play a vital role in industries that require strict sterility standards.
The International Organization for Standardization (ISO) created these standards, with ISO 14644-1 serving as the primary classification system. Modulus Cleanrooms has prepared this article to help you understand these standards and how they apply across various industries.
In industries such as biotech, semiconductors, and aerospace, even the smallest impurity can result in defective products, operational failures, or serious health risks.
Cleanrooms are specially controlled spaces that regulate airborne particles, temperature, humidity, and HEPA filtered air pressure. ISO standards help companies create and maintain these environments, ensuring that sterility standards stay within strict limits.
These cleanrooms, along with their associated controlled spaces, are critical for maintaining product integrity and supporting high-precision operations across various sectors.
ISO 14644-1 is the standard that defines cleanroom classifications based on the concentration of airborne particles. The goal is to categorize modular cleanrooms by their ability to limit particles of specific sizes, such as dusty air particles or microorganisms. This standard ensures that facilities can maintain appropriate cleanliness for sensitive operations, from Critical cGMP to microchip production.
ISO 14644-1 specifies nine classes of modular cleanrooms based on the number and size of particles present per cubic meter of air. As the iso class number increases, the allowed particle concentration count also rises, meaning Class 1 is the cleanest in terms of the concentration of particles, while Class 9 allows higher impurity levels.
Below is an overview of the classes, starting with the cleanest:
Each class dictates how many particles of a specific size (e.g., 0.1, 0.3, or 0.5 microns) are permissible.
The ISO cleanroom classification is determined by the specific requirements of your operations, with the goal of maintaining contamination control levels that are safe for your product or process. Choosing the appropriate class is crucial—for instance, Class 5 or higher is typically required for Bio Tech Medical, whereas semiconductor manufacturing may demand the extreme cleanliness of Class 1.
Working with industry experts like Modulus Cleanrooms, who bring over 20 years of experience, can help you choose the right ISO classification tailored to your needs. Their guidance ensures that your cleanroom-controlled spaces meet all essential manufacturing standards for top performance and safety.
Regular testing is essential for ensuring that modular cleanrooms consistently maintain the required particle levels, using specialized equipment such as particle counters and air samplers.
The frequency of testing—whether daily, weekly, or monthly—depends on the specific industry and ISO cleanroom classification. To ensure compliance, both airborne particle counts and surface contamination levels are measured, helping to verify that cleanliness standards are continuously upheld.
Air Changes Per Hour (ACH) refers to the frequency at which the air within a cleanroom is completely replaced, with higher air changes per hour rates required for cleaner classes to swiftly remove contaminants before they can settle on surfaces.
For instance, a Class 5 cleanroom typically requires around 240-300 air changes per hour, while a Class 8 cleanroom may need only 5-30 air changes per hour. Monitoring these air changes is crucial for maintaining compliance, and Modulus Cleanrooms can provide expertise in system design and testing to ensure that your cleanroom meets the necessary standards.
Maintaining cleanliness in a cleanroom requires a combination of routine and deep cleaning procedures. Routine cleaning involves regulated wiping of surfaces and floors to prevent dust accumulation, while deep cleaning is performed less frequently to thoroughly clean hard-to-reach areas.
Recommended products include non-linting wipes, sterile alcohol solutions, and vacuum systems with HEPA filters, all of which help minimize contamination risks and ensure compliance with ISO standards.
ISO 14644-2 emphasizes the importance of ongoing monitoring to maintain consistent air cleanliness in cleanrooms, ensuring compliance with class requirements not only during initial testing but throughout regular operations. This standard provides guidelines for establishing monitoring schedules and setting acceptable air cleanliness limits.
Continuous monitoring systems can track and log essential parameters, including air particle counts, temperature, humidity, and pressure levels, to help maintain a controlled environment. By adhering to ISO 14644-2, cleanrooms can ensure that cleanliness standards are consistently upheld.
In addition to ISO 14644-1 and 14644-2, there are other standards that address specific cleanroom requirements.
These additional standards are essential for organizations operating in highly regulated industries. Modulus Cleanrooms ensures compliance with all relevant standards.
ISO cleanroom standards are essential for industries that require strict cleanliness control. They ensure the quality, safety, and reliability of products in sectors like Bio-Tech, semiconductors, and aerospace.
Understanding these standards and implementing proper testing, air filtration, and cleaning procedures helps businesses maintain compliance and avoid costly errors. Modulus Cleanrooms provides expert services to help businesses design, build, and maintain cleanrooms that meet ISO standards.
From choosing the right ISO classification to assisting with certification, Modulus Cleanrooms offers end-to-end support to ensure compliance and operational success. Contact Modulus Cleanrooms today to learn how we can help your organization meet ISO cleanroom standards and maintain optimal performance.
