J
jmjunker
Guest
Manufacturer's Response
Please find K&N filter testing methodology below. Good enough for me.
Also, the Air Force 1 uses K&N.
-Josh
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Air filters are not rated by micron size on an absolute basis. (See technical service bulletin 89-5R from the Filter Manufacturer's Council) The proper rating system for air filters is a testing procedure developed to measure the efficiency of the filtration media at varying micron sizes. We routinely subject a sample of our air filters to this testing procedure conducted by independent laboratories. The primary purpose of this testing is to ensure that our air filter designs meet or exceed automotive industry standards. These filtration tests are performed in accordance with the Society of Automotive Engineer's (SAE) J726 testing procedure. The content of the test dust used in accordance with the testing procedure follows:
Particle Size in Microns
% by Volume (+/- 3%)
<5.5
13
5.5 to 11
11
11 to 22
13
22 to 44
19
44 to 88
28
88 to 176
16
Our testing has demonstrated that on average, K&N air filters have an overall efficiency rating of between 97 and 99%. With proper cleaning K&N air filters will protect your engine for the life of your vehicle.
For more information about this and other questions you may have about K&N filters, please visit our website a www.knfilters.com and go to http://knfilters.com/facts.htm.
Thank you,
Leon S. Collins
K&N Technical Support
Please find K&N filter testing methodology below. Good enough for me.
Also, the Air Force 1 uses K&N.
-Josh
-------------
Air filters are not rated by micron size on an absolute basis. (See technical service bulletin 89-5R from the Filter Manufacturer's Council) The proper rating system for air filters is a testing procedure developed to measure the efficiency of the filtration media at varying micron sizes. We routinely subject a sample of our air filters to this testing procedure conducted by independent laboratories. The primary purpose of this testing is to ensure that our air filter designs meet or exceed automotive industry standards. These filtration tests are performed in accordance with the Society of Automotive Engineer's (SAE) J726 testing procedure. The content of the test dust used in accordance with the testing procedure follows:
Particle Size in Microns
% by Volume (+/- 3%)
<5.5
13
5.5 to 11
11
11 to 22
13
22 to 44
19
44 to 88
28
88 to 176
16
Our testing has demonstrated that on average, K&N air filters have an overall efficiency rating of between 97 and 99%. With proper cleaning K&N air filters will protect your engine for the life of your vehicle.
For more information about this and other questions you may have about K&N filters, please visit our website a www.knfilters.com and go to http://knfilters.com/facts.htm.
Thank you,
Leon S. Collins
K&N Technical Support
