Estimate velocity, hydraulic diameter, and friction loss for rectangular, round, and flat oval ducts. Supports both Churchill and ML modes for friction factor estimation.
The duct calculators size air distribution ducts and evaluate airflow performance. They provide quick friction loss estimates while maintaining consistency with ASHRAE guidelines for recommended velocity ranges.
in)CFM)ft)ft) (auto-filled by material selection)in) (no impact on calculation, affects final dimensions of ductwork)ft/min)Re)f) — Churchill (default) or MLin w.g.)