Press Release

Hands Down Software Releases Version 9 of HDPsyChart

Carmel Software Announces the Release of HDPsyChart Version 9
San Rafael, CA
April 6, 2025
Contact: Lucy Gooden
Phone: 800-339-6030
Carmel Software, a leader in the development of desktop, mobile and web-based HVAC software, acquired Hands Down Software (HDS) in 2024. Today, we are announcing the release of HDPsyChart Version 9, the first update to our ubiquitous psychrometric chart software in over 10+ years.

This version includes over 40 updates and bug fixes to ">Version 7, the most popular psychrometric chart software in the world. Just some of the updates include:

  1. Added ASHRAE data zones from the 2015 and 2021 “Equipment Thermal Guidelines for Data Processing Environments – ASHRAE TC 9.9 Reference.”
  2. Added world-wide ASHRAE climatic data from the 2017 and 2021 ASHRAE Handbook of Fundamentals. For 2017, weather data for over 8000 cities were added. For 2021, weather data for over 9100 cities were added.
  3. Added 2023 U.S. TMY3 weather data from the Climate.OneBuilding.org database that includes 8760 hourly data for 1000s of cities in the U.S.
  4. Added comfort data from ASHRAE Standard 55-2017 and 2020.
  5. Added additional ASHRAE ventilation data that includes data from ASHRAE Standard 62.1-2016 and 2019
  6. Includes a brand new feature called "templates" that allow you to store an unlimited number of psychrometric chart look-and-feels.
  7. For a complete list, click ">here.
This software tool includes the same basic functionality that allows for complete psychrometric and process analysis, all graphically displayed on beautiful charts with unmatched accuracy. It also provides a professional state point and process report detailing all of the psychrometric and process values. Both IP and SI units are fully supported by HDPsyChart.

Hands Down Software and Carmel are both now 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.

About Carmel Software

Carmel Software Corporation has been a leader in HVAC design software since 1995. In fact, our software currently powers the analysis capabilities of Autodesk's (makers of AutoCAD) 3D modeling software tools. Also, ASHRAE, Mitsubishi Electric, Trane, Johnson Controls, the U.S. Department of Energy, Honeywell, Carrier Corp., large western utilities, and other Fortune 500 building-services companies rely upon Carmel to develop custom mobile and desktop applications for their clients. We currently offer more than 40 iOS and Android mobile apps for HVAC.
Media Contact: Lucy Gooden, Phone: 800-339-6030