Report No. 3098477-001a
July 31, 2006
Page 2 of 4
Airflow Rate in % of Test Airflow Rate 50%
75%
100%
125%
80 0.300 0.250
60 50
0.200
40
0.150
30 0.100 20 0.050
10
0.000
0
1000
Resistance, in. Water
Resistance, Pa
70
1500
Airflow Rate, cfm
2000
2500
Graph 1: Resistance of Clean Device vs. Airflow
Air Velocity Airflow Rate in % of Test m/s Airflow Rate 1.25 50% 1.87 75% 2.50 100% 3.12 125% Table 1: Resistance of Clean Device vs. Airflow
fpm 246.0 369.0 492.0 615.0
Airflow Rate m3/s 0.47 0.71 0.94 1.18
cfm 1000 1500 2000 2500
Resistance Pa 18 33 54 78
in H2O 0.073 0.134 0.215 0.313