HVAC Duct Size Calculator by Alan Cave

This duct sizing iPhone app was created for HVAC design professionals who might normally use a "ductulator" to select an appropriate duct size for their project.

The app goes beyond simply calculating velocity, friction, or volume; It also offers a list of ducts that meet the design criteria for the user's review and consideration.

The app features a highly intuitive interface which allows the user to easily adjust values with precision (without the use of cumbersome "slider" controls), or alternatively to enter the values directly with a keypad interface.

Feel free to email comments and suggestions to ductapp@elecpe.com

Added aspect ratio for each duct size.