Chapter 6 –Testing and Repair, Page 6-4_____________________________________________________
Measuring Airflow – Cont.
Air Velocity Chart
For All CG3-UVi-SPC Series Except ‘‘DS’’ Series
Nominal
Height of
Inlet Slot
Without Custom Air Baffles
With Custom Air Baffles
Static
Pressure
At Duct
Collar
Designed
CFM per
Lineal Ft.
Average Inlet Slot
Velocity (FPM)
Min. Optimum Max.
Designed
CFM per
Lineal Ft.
Average Inlet Slot
Velocity (FPM)
Min. Optimum Max.
3’’
(Std.)
4’’
(Enl.)
250
270
285
300
400
405
1300 1380 1450
1360 1435 1500
1425 1500 1575
1465 1545 1625
1690 1780 1870
150
160
170
180
250
760 800 880
790 830 870
810 855 900
845 880 935
1040 1095 1150
1.33
1.65
1.70
1.65
1.70
Air Velocity Chart
For All ‘‘DS’’ Series (Dual Slot)
Designed CFM Per Lineal Ft.
Required Average Inlet Slot Velocity (FPM)
Static
Pressure
At Duct
Collar
Total CFM
Both
Slots
Front Slot
Rear
Slot
Front Slot
Min. Optimum Max
Rear Slot
Min. Optimum Max.
300
400
150
250
150
150
760 800 880
1375 1450 1520
595 625 655
595 625 655
1.65
1.65
Chart C-6-4-1
Chart C-6-4-2