Calculadora de Dimensionamiento de Ductos — Fórmula
## Duct Sizing by Velocity
**A = CFM / Velocity**
**Diameter = 2 x sqrt(A / pi)**
Convert the area to diameter for round ducts. For residential trunk lines, maximum velocity of 700 ft/min keeps noise low. Branch runs can go up to 600 ft/min. Round up to the next standard duct size.
**A = CFM / Velocity**
**Diameter = 2 x sqrt(A / pi)**
Convert the area to diameter for round ducts. For residential trunk lines, maximum velocity of 700 ft/min keeps noise low. Branch runs can go up to 600 ft/min. Round up to the next standard duct size.
Ejemplo Resuelto
400 CFM at a max velocity of 700 ft/min.
- Area = 400 / 700 = 0.571 sq ft = 82.3 sq in
- Diameter = 2 x sqrt(0.571 / pi) x 12 = 10.2 in
- Use a 10-inch round duct (or 12-inch for lower velocity).