Duct Size Calculator
Size air conditioning supply/return ducts using the equal friction method.
CFM
1008000
in. WC
0.050.25
Recommended Round Duct Size
Ø 29 Inches
Friction Design Target
0.10 in. WC
Equivalent Rectangular Width
35 Inches
Equivalent Rectangular Height
24 Inches
Approximate Duct Velocity
800 FPM