The FILTER CLASS COMPARISON CHART offers an in-depth comparison of major air filter standards, including ISO16890, EN779, EN1822, and ASHRAE 52.2. ISO16890 categorizes filters based on their efficiency in capturing particulate matter across different size ranges: ePM1, ePM2.5, and ePM10. EN779 evaluates filters by their synthetic dust capacity and particle removal percentage, classifying them into groups such as G1 to F9. EN1822 focuses on filter efficiency within the 0.08 – 0.15 µm range, providing precise measurements of filter performance for EPA, HEPA and ULPA Filters. ASHRAE 52.2 assigns MERV ratings, which indicate a filter’s ability to capture particles in various size ranges. This chart is essential for comparing these standards, helping users select the most suitable filters for achieving optimal indoor air quality.