The European Standard EN1822 is a critical piece of regulation in the field of air filtration, governing the testing and classification of high-efficiency particulate air (HEPA) and ultra-low penetration air (ULPA) filters. These filters play a vital role in various applications, from cleanroom environments to medical facilities, and are essential for ensuring the air quality in these spaces. This article delves into the details of the EN1822 standard, explaining its importance, structure, and classification system, as well as providing guidance for filter selection and maintenance.

Importance of EN1822

The EN1822 standard was developed by the European Committee for Standardization (CEN) to establish uniform criteria for the testing, classification, and quality control of HEPA and ULPA filters. By creating a unified set of guidelines, the standard ensures that these filters meet the specific performance requirements necessary to protect sensitive environments from contamination, safeguarding both people and processes from harmful airborne particles.

Parts of EN1822

The EN1822 standard is composed of several parts, each addressing specific aspects of filter testing and classification:

• EN 1822-1: 2019 – High efficiency air filters (EPA, HEPA and ULPA) – Part 1: Classification, performance testing, marking.
• EN1822-2: This section details the aerosol production, measuring equipment, and test systems used to evaluate filter performance. No longer valid.
• EN1822-3: This part explains the testing process for determining the efficiency of flat sheet filter media. No longer valid.
• EN1822-4: This section provides guidelines for leak testing of filters. No longer valid.
• EN1822-5: This part explains the process for determining the efficiency of filter elements. No longer valid.

The EN1822 standard classifies HEPA and ULPA filters based on their efficiency at MPPS (Most Penerating Particle Size – 0.1 to 0.2 µm)

HEPA Filters:

• H13: ≥99.95% efficiency at MPPS
• H14: ≥99.995% efficiency at MPPS

ULPA Filters:

• U15: ≥99.9995% efficiency at MPPS
• U16: ≥99.99995% efficiency at MPPS
• U17: ≥99.999995% efficiency at MPPS

Filter Selection and Maintenance

Selecting the appropriate filter for a specific application requires considering factors such as the required level of air cleanliness, process sensitivity, and potential contaminant sources. By referring to the EN1822 classification system, users can ensure that the selected filter meets the necessary performance criteria for their needs.

Proper maintenance of HEPA and ULPA filters is crucial for their continued efficiency and longevity. The EN1822 standard mandates regular leak testing and monitoring to detect potential filter damage or loss of efficiency. Additionally, adhering to a filter replacement schedule based on the manufacturer’s recommendations is essential to maintain optimal air quality in sensitive environments.

The EN1822 standard plays a crucial role in ensuring the performance and reliability of HEPA and ULPA filters across various industries. By providing a comprehensive set of guidelines for testing, classification, and quality control, the standard guarantees that these filters meet the stringent requirements necessary to protect sensitive processes and environments. Understanding the details of the EN1822 standard is essential for selecting the appropriate filter and maintaining the air quality of critical applications.

Compliance and Certification

To ensure compliance with the EN1822 standard, filter manufacturers must submit their products for testing and evaluation by accredited laboratories. These laboratories use the methods and procedures defined in the standard to assess the filter’s performance, efficiency, and overall quality.

Upon successful evaluation, the filter will receive a certification demonstrating its compliance with the EN1822 standard. This certification is typically displayed on the product’s packaging or documentation, providing users with confidence that the filter meets the necessary performance requirements.

Importance of Quality Control

Manufacturers must adhere to stringent quality control processes to ensure that their filters consistently meet the EN1822 standard. This includes monitoring production processes, conducting regular in-house testing, and addressing any deviations or issues promptly. By maintaining a rigorous quality control program, manufacturers can guarantee the reliability and performance of their HEPA and ULPA filters.

Applications of EN1822 Filters

HEPA and ULPA filters compliant with the EN1822 standard are used in a wide range of applications where air quality is of utmost importance. Some of these applications include:

Cleanrooms: In industries such as pharmaceuticals, biotechnology, and electronics, maintaining a contamination-free environment is crucial for the integrity of processes and products.
Hospitals and Medical Facilities: Air filtration is essential to prevent the spread of airborne pathogens and protect patients, particularly in operating rooms, intensive care units, and isolation rooms.
Laboratories: Research facilities, including those working with hazardous materials, rely on high-quality air filtration to safeguard both personnel and experiments.
Aerospace and Defense: Advanced technologies and sensitive equipment require contamination-free environments to ensure optimal performance and reliability.

By understanding the EN1822 standard in detail, users can make informed decisions about filter selection and maintenance, ultimately contributing to the protection of sensitive environments and the people and processes within them. The standard’s comprehensive guidelines, rigorous testing procedures, and classification system guarantee that HEPA and ULPA filters meet the stringent requirements necessary for a wide range of critical applications.