Each zone is a separate cold room (or other tool calculation) in this facility. Pick a tool to start a fresh calc — when you're done, return here, save the project, and the result locks into this list.
No systems yet — click + Add system to begin.
This project file aggregates only what each tool wrote into its saved .json. Any system you opened but never saved is not included. Final electrical and refrigerant sizing must be performed once all systems are confirmed.