Tool

Ductulator

Can't fit the original duct? Enter your dimensions and space constraint to find the top 5 equivalent sizes that meet or exceed the original CFM.

Original Duct

Space Constraint

Equivalent Sizes

Original: 20" × 12" — 1250 CFM
24" × 10"
1400 CFM·240 sq in
Best Fit
Same area
26" × 10"
1430 CFM·260 sq in
±20 sq in
28" × 10"
1550 CFM·280 sq in
±40 sq in
30" × 10"
1670 CFM·300 sq in
±60 sq in