Views: 0 Author: J-VALVES Publish Time: 2024-12-30 Origin: Site
Understanding EN 779 and ISO 16890
EN 779 was the European standard for rating air filters used in general ventilation systems. It classified filters based on their average efficiency at capturing particles of 0.4 micrometers in size. The classification ranged from G1 to F9, with F9 being the highest efficiency class.
ISO 16890 is the updated international standard that replaced EN 779 in July 2018. It classifies air filters based on their efficiency in capturing particulate matter (PM) across three size fractions: PM1 (0.3-1.0 µm), PM2.5 (0.3-2.5 µm), and PM10 (0.3-10 µm). This standard provides a more detailed and comprehensive evaluation of filter performance, aligning with the World Health Organization's (WHO) guidelines for air quality.
Key Differences Between EN 779 and ISO 16890
• EN 779: Tested efficiency at a single particle size of 0.4 micrometers.
• ISO 16890: Tests efficiency across a range of particle sizes (0.3-10 micrometers) and uses different test aerosols (DEHS for fine particles and KCl for coarse particles).
• EN 779: Classified filters into nine classes (G1 to F9) based on average efficiency at 0.4 micrometers.
• ISO 16890: Classifies filters into four categories (ePM1, ePM2.5, ePM10, and Coarse) based on their efficiency in capturing specific PM fractions.
• EN 779: Provided a general measure of filter efficiency but did not account for the varying sizes of particulate matter.
• ISO 16890: More accurately reflects real-world conditions by considering the efficiency of filters in capturing PM1, PM2.5, and PM10, which are more relevant to human health.
• EN 779: Filters were selected based on their efficiency at 0.4 micrometers, which may not fully represent their performance in capturing smaller or larger particles.
• ISO 16890: Provides a more nuanced understanding of filter performance, allowing for better selection based on specific PM fractions relevant to the application.
• EN 779: May not provide sufficient protection against smaller particles (PM1 and PM2.5) that are more harmful to human health.
• ISO 16890: Emphasizes the importance of capturing smaller particles, which are more likely to penetrate deep into the lungs and bloodstream, posing a greater health risk.
• EN 779: Filters with higher efficiency classes often had higher pressure drops, leading to increased energy consumption.
• ISO 16890: Encourages the selection of filters that balance efficiency and energy consumption, promoting more sustainable solutions.
