Editors' Note: The "Download Now" link directs you to the iTunes App Store, where you must continue the download process. You must have iTunes installed in order to open the link, and you must have an active iTunes account to download the application. This download may not be available in some countries.
What's new in this version:
1. In addition to performing simple duct sizing, you can now display a range of duct sizes by specifying minimum and maximum friction loss and airflow values. 2. Includes the ability to specify a maximum aspect ratio for this range of duct sizes 3. You can now email the inputs and results from all 3 duct sizing modes. The email includes html text and also a spreadsheet attachment (.CSV file). 4. Includes a convenient button to easily rate the app in the Appstore 5. It has been confirmed to work ... See all new features »