Filter #1: http://www.wixfilters.com/Lookup/PartDetails.aspx?Part=51307
Filter #2: http://www.wixfilters.com/Lookup/PartDetails.aspx?Part=51348
Both share the same beta ratio of 2/20=6/20. In other words, 50% efficient at 6 microns, and 95% efficient at 20 microns. However, the nominal micron rating is different - 21 for the 51307, and 15 for the 51348.
Can anyone explain the difference?
Filter #2: http://www.wixfilters.com/Lookup/PartDetails.aspx?Part=51348
Both share the same beta ratio of 2/20=6/20. In other words, 50% efficient at 6 microns, and 95% efficient at 20 microns. However, the nominal micron rating is different - 21 for the 51307, and 15 for the 51348.
Can anyone explain the difference?