Here's a real plus for high velocity or low velocity applications. HEPA-PLUSŪ takes deep pleat air filtration technology to levels way beyond other filters. HEPA-PLUSŪ, a HEPA Corporation exclusive, is a deeper, longer life minipleat pack. This versatile high capacity performer will out-distance similar filters while adhering to HEPA and ULPA standards. The HEPA-PLUSŪ advantage: 2000 CFM @ 1.30" w.g. * with a minimum efficiency of 99.97+% in a 24"x24" filter. 100 FPM @ 0.19" w.g. in a 24"x24" filter. Upgrade from hepa to ulpa with no additional operating costs and little or no equipment changes. Lower energy cost per filter in new or existing cleanroom designs. DOP, PSL, scan and/or laser efficiency tested as required. * Factory tested at 2000 CFM on production filters - not extrapolated from 1000 CFM test flow.