Pressure Drop (cm WC)	Flow through Sample (cm3/min)	Face Velocity (cm/min)	Challenge (particles/cm3)	Output (particles/cm3)	Corrected for Flow (particles/cm3)	% Penetration
With hole
13.142	1000	12.73	23,029	40.94	40.94	0.178
10.07	766	9.76	24,594	30.7	40.07	0.163
8.074	614	7.82	25,257	23.3	37.93	0.150
5.022	382	4.87	29,267	13.69	35.83	0.122
3.001	228	2.91	30,850	7.12	31.18	0.101
2.026	154	1.96	33,700	4.64	30.10	0.089
1.079	82.1	1.05	34,624	2.25	27.40	0.079
0.542	41.2	0.53	33,352	0.79	19.16	0.057
0.226	17.2	0.22	34,493	0.18	10.47	0.030
Hole plugged
11.964	1000	13.70	24,346	23.48	23.48	0.0964
8.008	669	9.17	27,516	12.99	19.41	0.0705
5.003	418	5.73	30,357	5.22	12.48	0.0411
3.035	254	3.48	31,130	1.44	5.68	0.0182
2.053	172	2.35	32,908	0.55	3.21	0.0097
1.021	85.3	1.17	33,342	0.050	0.59	0.0018

Table I. Test data for coated Tyvek 1073B with 25-µm hole. Bold text indicates data taken directly from an instrument.

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