Company Profile

Carmel Software has been developing and selling HVAC and other engineering software since 1995. Our software includes mobile, desktop, and web-based software for energy audits, HVAC load calculations, duct sizing, pipe sizing, psychrometrics, equipment maintenance, and much more.
We are located in the San Francisco Bay Area. Our clients include customers throughout the world, from the Fortune 500 and the U.S. Government, to smaller architectural/engineering firms.
In 2010, Autodesk, Inc. purchased a number of our desktop-based engineering software assets. (More information about this acquisition.) We are currently focusing on developing mobile apps and web-based software for HVAC, and we also offer a suite of mobile software tools for utility program providers. Click here for more info.
In 2024, Carmel acquired Hands Down Software, a leader in the development of desktop psychrometric chart software. Click here for details.

Featured Customers

The following is a partial list of some of the more well-known customers. Click here to view a comprehensive customer list.:
  • Autodesk
  • Carrier Corp.
  • Honeywell
  • Johnson Controls
  • Trane Company
  • U.S. Army
  • U.S. Dept. of Energy


The following is a list of some of our latest press releases:

Tips & Training

Quickly learn your way around our HVAC mobile apps with tips, videos and live training. For a list of all of our mobile apps, click here.