Technician
Name printed on Save PDF and Save Log reports. Leave blank to omit it.
Working refrigerant
Default refrigerant for RefCalc and highlights on the app home.
Temperature display
Temperature labels and inputs in RefCalc. Calculations always use °F internally.
Pressure display
Pressure labels and inputs in RefCalc. Calculations always use PSIA internally. kPa is gauge pressure.
Airflow volume
Fan Laws and RefCalc duct display unit. Air Flow steps 1–2 show CFM and L/s together. Calculations always use CFM internally.
Work session
When the app opens with saved calculator inputs, HVAC Lens can ask whether to reload them (on the main menu or the last tool you used). Saved inputs stay on this device either way.
Turn this off with Don’t show this again on the prompt, or here. Turn it back on anytime to see the offer again on the next open with saved work.
App development log
Session notes for PWA work. Public release summaries: Bug fixes & changes.
View app logLicense
Renew license freeRegistered devices
Up to 5 devices per license. Remove old devices to free slots for new ones.
Remove license key
Removing your key clears the saved license from this device. You will need to enter your key again to use the app, and offline access will be unavailable until you unlock again.