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midijunky · #7 (**permalink**) 05-03-2008, 11:48 AM

nah it's not a brand.

HEPA stands for High Efficiency Particulate Air. They were invented for the manhattan project. They catch particles as small as 3 microns.

#7 (permalink) 05-03-2008, 11:48 AM
midijunky User_298 Join Date: Apr 2008 Location: SoCal Posts: 107	nah it's not a brand. HEPA stands for High Efficiency Particulate Air. They were invented for the manhattan project. They catch particles as small as 3 microns.