Carmel Software

We've updated our Residential Load Calc iPhone app for iOS 26:

Our Manual J HVAC Residential Load Calcs HD app for the iPad now works with iOS 26.x

ResLoad-J iPad app now works with iOS 26.x

Check out our latest newsletter announcing new services and features for our Hands Down Software tools:

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We continue to add the "Share" button to all of our apps including our load calculation apps for the iPad. This allows you to email, text, print, and store locally or in the cloud all PDF reports.

Our latest newsletter:

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We are releasing updated versions of all of our iOS mobile apps that include the ubiquitous "Share" icon that allow users to share reports via email, text, iCloud, and by many other means.

This is the HVAC Duct Sizer app for the iPad.

We are beginning to release updated versions of all of our iOS mobile apps that include the ubiquitous "Share" icon (see the red square below) that allows users to share reports via email, text, iCloud, and many other means.

Cool use-case using our HDPsyChart V9 software: A user imported 9,000 temperature data points from a Hobo data logger to perform building commissioning diagnosis:

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Hands Down Software Releases HDPsyChart V9 Email from Carmel Software Hands Down Software Releases HDPsyChart V9 Purchase HDPsyChart V9 Here This Spring, we announced the first upgrade to HDPsyChart in over a decade: HDPsyChart V9. This upgrad