Carmel Software Releases Updated HVAC Duct Sizer App

March 4, 2014
The HVAC Duct Sizer app allows users to size new duct systems by inputting air flow and velocity or friction loss.

SAN RAFAEL, CA —  Carmel Software, developers of engineering software, has released a major update to its very first mobile app: the HVAC Duct Sizer (Universal). This app now runs on the Apple iPad in addition to the iPhone. This means that the same app will run on both devices and adjust its screen accordingly.

One feature of the HVAC Duct Sizer app is the ability to size duct by dimensions.

The HVAC Duct Sizer application allows users to quickly size one or more runs of duct using the constant friction method. Think of it as a digital version of the classic Trane Ductulator. It allows users to size new duct systems by inputting air flow and velocity or friction loss. It also allows users to size existing systems by inputting duct dimensions and air velocity. Additional parameters can be specified such as duct material type, aspect ratio, duct shape, air temperature and pressure.

"When we first released this app more than four years ago, there were only ten or so HVAC apps on iTunes. Today, there are thousands," says Stephen Roth, P.E., principal of Carmel Software. "Our Duct Sizer app has sold thousands worldwide over the past four years, and has always been the highest ranking HVAC duct sizer app on iTunes. Now, this app is available for iPad users," Roth says.

The HVAC Duct Sizer is described as the perfect tool for HVAC technicians, designers, architects, and even home owners. Visit for more information.

About Carmel Software

Carmel Software has been developing and selling engineering software for over 17 years. In 2008, Carmel sold its desktop engineering analysis applications and software code base to Autodesk, the makers of AutoCAD. Currently, their software code is used to power some of the analysis capabilities of Autodesk Revit. They are now focusing their efforts on developing mobile and tablet-based software for the building services industry with clients such as Mitsubishi Electric, Honeywell, Ingersoll-Rand (Trane), the US Department of Energy, Pacific Northwest National Laboratory, DNV GL, Advantix Systems, and others.