Suodatusluokat

Suodatusluokat, often translated as "filtration classes" or "filter categories," are used to classify and standardize the performance of filters, particularly in air purification and industrial processes. These classes help users understand a filter's ability to remove particles of different sizes and types from a fluid medium, usually air. The most common classification systems are the European EN 1822 standard for HEPA and ULPA filters, and the ISO 16890 standard for general ventilation filters.

The EN 1822 standard defines specific efficiency ratings for HEPA (High-Efficiency Particulate Air) and ULPA (Ultra-Low Penetration Air) filters. These filters are crucial in applications requiring very clean air, such as hospitals, cleanrooms, and the semiconductor industry. The standard categorizes HEPA filters into H10, H11, H12, H13, and H14, with each subsequent class indicating a higher minimum efficiency at a specific test particle size. ULPA filters are even more stringent, with categories U15, U16, and U17.

The ISO 16890 standard, which replaced the older EN 779 standard, provides a more performance-based approach to classifying filters used in general building ventilation. It categorizes filters based on their ability to remove PM10, PM2.5, and PM1 particles, which are common atmospheric pollutants. This standard allows for a more accurate assessment of a filter's real-world effectiveness in improving indoor air quality by considering both particle removal efficiency and energy consumption. Understanding these suodatusluokat is essential for selecting the appropriate filter for a given application, ensuring optimal performance and air quality.