Originally Posted By: i6pwr
When a consumer sees the >20 micron @ 99%, I'm thinking 99% from 21 microns and up...so 99% @21 microns isn't hardly much difference that 20 microns.
And filtering out particles at 20.1 microns is essentially the same thing as filtering out particles at 20.0 microns.
Originally Posted By: i6pwr
Even with being able to filter 99% from 20 and up still doesn't show how much it will filter from 20 to 25 microns. The filter could filter 99.8 from 25 to 100 microns and that last 5 from 25 to 20 microns takes away that .08%, so there is a fine line there in terms of physics.
You have to understand that if a filter is "99% at 20 microns or greater" then it is even BETTER than 99% at all particles larger than 20 microns. ALL filters work this way.
There is no filter in the world that filters worse at 20 microns than it does at anything above 20 microns.
When a consumer sees the >20 micron @ 99%, I'm thinking 99% from 21 microns and up...so 99% @21 microns isn't hardly much difference that 20 microns.
And filtering out particles at 20.1 microns is essentially the same thing as filtering out particles at 20.0 microns.
Originally Posted By: i6pwr
Even with being able to filter 99% from 20 and up still doesn't show how much it will filter from 20 to 25 microns. The filter could filter 99.8 from 25 to 100 microns and that last 5 from 25 to 20 microns takes away that .08%, so there is a fine line there in terms of physics.
You have to understand that if a filter is "99% at 20 microns or greater" then it is even BETTER than 99% at all particles larger than 20 microns. ALL filters work this way.
There is no filter in the world that filters worse at 20 microns than it does at anything above 20 microns.