Desperation is a powerful teacher. Arjun spent the next two hours on HVAC forums, Telegram groups, and Reddit. And there, buried in a thread from 2019, was a link: carel-1tool-v2.5-free.zip hosted on a file-share site with a name that sounded like a sneeze.
But gravity doesn't care about budgets.
"Good morning, this is Arjun from Aster Palms. I need a license key for 1Tool. Our chiller is failing."