Surface contamination control is a challenging process within any cleanroom. “Unseen” particles, those particles smaller than 40 microns, can be the most difficult to control. The Minuteman Model CRVTM – Clean Room Vacuum was especially designed to be an intricate part of your facility cleaning procedures. It is ideal for use in Class 1 through Class 100,000 cleanrooms, gowning areas and air showers in all pharmaceutical labs, medical devices manufacturers, biological labs and computer rooms. Our absolute filtration system includes a dual layer disposable paper bag, a non-woven cloth filter and a standard U.L.P.A (Ultra Low Particulate Air) filter, 99.999% efficient at 0.12 microns. This efficiency is much greater than normal H.E.P.A (High Efficiency Particulate Air ) filters.