Standard 52.1-1992 provides three important evaluation criteria:
- dust spot efficiency
- arrestance
- dust holding capacity
Standard 52.2-1999 provides a filter’s initial efficiency as a function of particle size, as well as a numeric value that allows a user or engineer to specify a product's minimum efficiency reporting value (MERV).
Read the attached Camfil Farr overview, which fully explains the standards and how to use them. Download the PDF document.