MERV Rating Scale (Particulate Matter)

MERV Rating Scale

MERV stands for Minimum Efficiency Reporting Value. It was developed by the American Society of Heating, Refrigeration and Air Conditioning Engineers (ASHRAE). MERV values range from 1 to 20. The higher the MERV value, the more efficient the filter is at trapping dust, contaminants and other particulate matter.

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MERV Rating for Dust Collector Filter Comparisons