Envirco NSF Biohazard Cabinet - Manual (Page 10)

10
Airflow
10448 - EBC 47, 4-Ft Type A/B3:
Direct Inflow Method Type A/B3
-Velocity 100 – 110 fpm
-Airflow 253 – 278 cfm
Calculated Face Velocity 115 – 125 fpm
Exhaust Volume 290 – 316 cfm
Exhaust Filter Area 1.07 sq. ft.
Front Access Area 2.53 sq. ft
Downflow Velocity
Uniform 72 – 82 fpm
or
Zoned
Zone 1 (Back) 67 – 77 fpm
Zone 2 (Center) 67 – 77 fpm
Zone 3 (Center) 80 – 90 fpm
Zone 4 (Front) 74 – 84 fpm
10276, 6-Ft Type A:
Calculated Face Velocity Type A
-Velocity 85 – 95 fpm
-Airflow 324 – 362 cfm
Exhaust Filter Area 2.33sq. ft.
Front Access Area 3.81 sq. ft.
Downflow Velocity
Zone 1 (Back) 54 – 64 fpm
Zone 2 (Center) 53 – 63 fpm
Zone 3 (Front) 67 – 77 fpm
10451, 6-Ft Type B3:
Calculated Face Velocity Type B3
-Velocity 100 – 110 fpm
-Airflow 381 – 419 cfm
Exhaust Filter Area 2.33sq. ft.
Front Access Area 3.81 sq. ft.
Downflow Velocity
Zone 1 (Back) 75 – 85 fpm
Zone 2 (Center) 75 – 85 fpm
Zone 3 (Front) 68 –78 fpm