One run, one set of numbers, one bill of quantities. The Duct system calculator on Starduct Hub runs entirely in the browser: lay out the duct run from the fan / AHU to every outlet, and the tool sums the airflow, sizes the ducts, computes the loss of each section with ASHRAE fitting coefficients, finds the index run and gives the ESP for fan selection.
Three steps
- System settings — supply / return / exhaust, duct material, sizing by velocity or friction, fan margin, leakage, target NC, automatic VCD at each branch.
- Duct run — one row per straight section, just name the parent; the last section takes the number of outlets × airflow; devices on a section toggle with one button (fire damper, VCD, VAV, silencer).
- Results — fan airflow, index-run ESP, resistance table, Starduct devices with order code, ΔP, NC and the data source (measured per test report or calculated), bill of quantities for duct – fittings – UNISTAR hangers – devices. Export to Excel, CSV, PDF or add to the project list shared with the selectors.
Every number comes from the same engine as the catalogue and the selector of each product line. Results are preliminary — the designer checks them before use.
Figures in this article verified by R&D / QA
Data sources: Figures in the video come from the duct system calculator's built-in example; each device's data is labelled with its model's data tier (measured, or calculated – not tested).
