Large Blower Due To Dust Loading Of '" Filter, NRL, Washington, D.C. Air Volume (Ft” x 10-©) S © oP) N © N #£ | O Total Air Flow At Rated Flow- Rate Average Total Air From Measured Flow Rates | 2 | | | | 3 4 5 6 Collection Time (Days) | t S-Ebllv N © Fig.2: Variation Of Total Air Flow With Time For