Calculadora de Dimensionamiento de Ductos Gratis
Calcula el tamaño adecuado de ductos de aire acondicionado según el flujo de aire requerido.
Round Duct Diameter
10.2 in
Round Duct Diameter vs Airflow
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.
Ejemplo Resuelto
400 CFM at a max velocity of 700 ft/min.
- 01Area = 400 / 700 = 0.571 sq ft = 82.3 sq in
- 02Diameter = 2 x sqrt(0.571 / pi) x 12 = 10.2 in
- 03Use a 10-inch round duct (or 12-inch for lower velocity).
Preguntas Frecuentes
What velocity is too high for residential ducts?
Above 900 ft/min in trunk lines and 700 ft/min in branches, duct noise becomes noticeable. Keeping velocities below these limits ensures quiet operation.
How do I convert round to rectangular ducts?
Use the equivalent diameter formula: De = 1.3 x (a x b)^0.625 / (a + b)^0.25, where a and b are the rectangular dimensions.
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