Calculadora de Velocidad en Ductos — Fórmula
## Duct Air Velocity
**V = CFM / A**
Where A is the cross-sectional area of the duct in square feet. Convert the diameter from inches to feet before calculating the area. Residential duct velocity should stay below 700-900 ft/min to avoid noise.
**V = CFM / A**
Where A is the cross-sectional area of the duct in square feet. Convert the diameter from inches to feet before calculating the area. Residential duct velocity should stay below 700-900 ft/min to avoid noise.
Ejemplo Resuelto
300 CFM through an 8-inch round duct.
- Area = pi x (8/24) squared = 0.349 sq ft
- Velocity = 300 / 0.349 = 860 ft/min
- This is borderline for noise; consider a 10-inch duct.