Resi Duct Quicksize

Resi Duct Quicksize gives installers instant round or rectangular duct recommendations without accounts or networking.

Use it to:

- enter airflow (CFM)
- choose shape (round or rectangular)
- select a residential preset or ratio
- see recommended diameter or width-height, velocity, and area in seconds

Launch build scope:

- local-first workflow only
- residential round and rectangular duct sizing
- recent sizing history stored on device
- no login, subscription, analytics, or cloud dependency

Why people will pay:

- saves multiple trips to old spreadsheets
- works offline, even in basements or unfinished spaces
- shows recent sizing history so common jobs do not need re-entry
- stays focused on residential presets instead of full HVAC suite complexity