MERV and Its Relationship to Dust Collection

In dust collection applications, the MERV value has little bearing on the long-term efficiency of the system. Most dust collector filters, whether the filters are cleaned by shaking or pulsing with compressed air, reach a steady state operating condition within the first couple hundred operating hours. A layer of dust builds on the surface of the filter, creating a dust cake that will typically remain on the filter through its entire useful service. This dust layer makes the filter more efficient than the stated MERV value, in effect, negating the purpose of the rating in many instances.

What is important in most dust collection applications is that you are using the correct filter media, the correct amount of media, and the correct configuration to allow for proper cleaning of the filter. When a dust collector system fails, it's more commonly one of these factors that lead to its failure, rather than the MERV rating of the filter. Trion’s engineers and authorized representatives have the experience and knowledge to determine what type of filter is best for your application. Contact them today to determine how Trion can solve your dust collection application needs.

MERV Facts

  • MERV rating is almost always the lowest on new filters. Adding dust/dirt to the filter typically increases its efficiency.
  • A higher or lower MERV does not mean the filter will perform. Ensure the media type and filter design is right for the type of dust that needs filtering
  • MERV does not account for filter damage caused by abrasive dusts, chemical incompatibilities, sparks, high pressure drops, etc.
  • MERV ratings can be tested at one of seven specific air velocities. Check with your supplier to ensure its reported value corresponds to your specific application.