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MERV RATING CHART. 99.999% eff. On .10-.20 pm Particles > 99.999% eff. On .30 pm Particles >99.99% eff. On .30 pm Particulates. 99.97% eff. On .30 pm Particles. Box Filter- Rigid Style Cartridge Filters 6 to 12" deep m ay use lofted or paper media. Box Filter- Rigid Style Cartridge Filters 6 to 12" deep m ay use lofted or paper media.
We’ll look at MERV 1-20 ratings in the MERV rating chart (you’ll find the chart further on). We’ll also look into how high a MERV rating an air purifier should have to best filter out different air contaminants (pollen, mold spored, smoke, dust, etc.).
This page aims at detailing the different norms for filter efficiency (MERV, ISO) and to help the reader chose the right filter specification depending on the application intended. 1. Dust filtration efficiency norms and charts.
The chart lists typical contaminants controlled, applications, and common filter types for each MERV rating level from 1 to 20. MERV ratings help identify the appropriate filter for an application based on desired filtration efficiency.
MERV values in the 52.2 test reporting. Note: This table is intended to be a general guide to filter use and does not address specific applications or individual filter performance in a given application. Refer to manufacturer test results for additional information.
This document provides a chart summarizing MERV ratings for air filters. MERV ratings indicate a filter's effectiveness in capturing particles of various sizes, with higher numbers indicating better performance.
recommendations is to consider filters with the highest MERV feasible because most biological and radiological particles are in the range of 0.1 to 10 microns. A filter with a MERV rating of 14 to 20 can be very effective in defending against these particles. Contaminant Long Term Short Term Concentration Averaging Concentration Averaging
