Duct Sizer Program Free Download |best| May 2026

Industry standard; supports metric/imperial; simple EXE file. Android/iOS Portable; digital version of the Trane Ductulator. h2x Free Online Ductulator

Finding the right is essential for HVAC engineers and contractors who need to move beyond manual charts like the "ductulator." While many professional suites require expensive licenses, several high-quality, free-to-download tools like the McQuay Duct Sizer (Daikin) remain industry favorites for their precision in calculating airflow, velocity, and friction loss. Top Free Duct Sizer Programs for Download duct sizer program free download

Simple interface for calculating CFM, friction, and duct size. Industry standard; supports metric/imperial; simple EXE file

Modern UI; CIBSE-verified calculations; no install required. simple EXE file. Android/iOS Portable