ISO 29463 originates from EN1822, which defines EPA, HEPA and ULPA filters commonly used in industry. While ISO 29463 maintains the classification of EPA, HEPA and ULPA.But replace E10-E12, H13-H14 and U15-U17 with the following 13 filter levels. The ISO 29463 can't replace EN 1822, EN 1822 will continue to be valid.

In modern air filtration applications, users are increasingly concerned with how well filters remove particles in the PM2.5 and PM10 size ranges. ISO 16890 is now the leading international standard for evaluating air filter performance for general ventilation.
This article provides a clear explanation of how ISO 16890 defines and measures ePM1, ePM2.5, ePM10, and Coarse filtration efficiencies, as well as key topics such as aerosol types, particle size classification, data processing, and equipment design requirements.

Bottlenecks in Industrial Detection Efficiency and Limitations of Traditional TestingPain Points of Industry EfficiencyIn the industrial production of filter products, low detection efficiency has become a significant obstacle that affects production capacity and increases costs.

The Crucial Role of Aerosol Concentration Control in DetectionThe Significance of Aerosol Detection in Filter Product Performance EvaluationAerosol detection is a fundamental aspect of evaluating the performance of filter products.

Challenges Posed by Product Specification Diversity in Industrial DetectionVast Differences in Filter Product Specifications across Industries and ScenariosIn the industrial landscape, filter products vary significantly in terms of size, shape, structure

The Significance and Challenges of Leak DetectionThe Crucial Role of Leak Detection in Filter ProductsIn the manufacturing of filter products, leak detection is a fundamental process that directly impacts product quality and user safety.

In the realm of industrial production, filter products play a crucial role in various sectors, from automotive manufacturing to environmental protection. However, traditional manual detection methods for filters are fraught with challenges. These methods are not only time - consuming but also highly

It is generally believed that as airflow increases, face velocity increases, and filtration efficiency decreases. In other words, lower airflow (lower velocity) should lead to higher filtration efficiency.
However, in actual testing—such as at 500 m³/h—the opposite is sometimes observed: efficiency decreases when airflow is reduced. This article aims to analyze the underlying reasons. Notably, this phenomenon has also been observed by experienced professionals in the filtration industry, and we share our findings and discussion here.

EN 1822, ISO 29463, and IEST-RP-CC003.4 are three key standards for classifying and testing HEPA (High-Efficiency Particulate Air) and ULPA (Ultra-Low Penetration Air) filters. While they share similarities, they differ significantly in testing methods, particle size considerations, classification, and application scope. Below is a comprehensive comparison.

EN 14683 applies to medical face masks, focusing on bacterial filtration and splash resistance.
N95 respirators follow NIOSH standards, focusing on particle filtration and facial fit.