Duct Flow Calc HVAC Tool2026 — ASO

By Nanjing Yunxiaochuang Technology Co., Ltd on AppTrack Ninja.

Offline HVAC duct and airflow

Duct Flow Calc is an offline utility for HVAC and ventilation field work. It helps you quickly calculate airflow, air velocity, duct size, and round-to-rectangular duct equivalence. All data is stored only on your device. No login, no network connection, and no user data collection are required. Core features: 1. Convert airflow, velocity, and cross-sectional area with common unit switching. 2. Recommend rectangular duct sizes and derive width-height combinations from a target velocity. 3. Convert between circular and rectangular equivalent ducts for easier design comparison. 4. Estimate simp…

Categories: Utilities

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