823 3rd Ave Brooklyn N.Y. 11232

800 292-2466
hvac.ltd

Round Duct Air Flow CFM Table

4"

20 CFM

5"

50 CFM

6"

80 CFM

7"

120 CFM

8"

170 CFM

9"

230 CFM

10"

300 CFM

12"

500 CFM

14"

740 CFM

16"

1050 CFM

18"

1400 CFM

20"

1875 CFM