Ashrae Duct Fitting Database Excel Instant

For fittings at low velocities (e.g., VAV systems at part load), the (C_o) varies significantly. Your Excel tool must include a correction algorithm based on Re = (D_h * V) / ν.

⚠️ Manual lookup – requires copying coefficients into your own calculation sheet (no built-in simulation).
⚠️ Interpolation needed – many tables provide discrete geometry ratios; linear interpolation in Excel is user-driven.
⚠️ Version control – older versions (pre-2017) may use outdated coefficients or figure numbers.
⚠️ No 3D or CFD – cannot model complex interactions like skewed flow at junctions.
⚠️ Potential errors – manual data entry from PDF to Excel (if user-created) may have typos. ashrae duct fitting database excel

✅ No special software required – works on any computer with Excel.
✅ Customizable – users can add project-specific fittings or adjust coefficients for non-standard conditions.
✅ Transparent calculations – formulas and lookups can be verified.
✅ Easy integration – can be linked to duct sizing sheets, fan static pressure calculators, and system effect factor tables.
✅ Low cost – if you already have ASHRAE Handbook access. For fittings at low velocities (e