While we're on the topic of filters,

Does anyone have any rough numbers for pressure loss/particle size
across the various types of filters:
fiberglass mat, paper, foam, foam and oil, other?

Another question would be what size particulate are we concerned with?
big and solid is obviously bad, dust storms also bad, do we need to go to
electrostatic HEPA dust filters?

Has anyone used large flat panel furnace filters?

Thanks
Cary


Sixty percent of wear comes from particles in the 5-20 micron range.  80% of
engine oil contaminants come from the air.

Consider the Donaldson Endurance media - a non-woven cloth.  Nearly the same
pressure drop as a fresh K&N, with better particle capture than a seasoned
paper filter.
http://www.donaldson.com/en/filtermedia/support/datalibrary/003313.pdf

Andy


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