As I recall ... every single a/c condenser unit I've seen states "Outdoor Use" on them ...
"Outdoor Use" does not include "Outdoor Use or Indoor Use".
With but one exception - years ago, in South Florida, in garages of mid-upscale homes in Palm Beach County, the use of an a/c compressor designed to set on top of the water heater in the garage (they were actually heat pumps) and cooled the garages by transferring the heat to the water heater.
Other than being noisy in the garage, they did cool the garage pretty well, however, they also did heat the water in the water heater pretty hot if run long enough. The hotter the water got, the less efficient they became (not that that mattered to the owners), however, the hotter the water got, the more risk of scalding there was.
Good idea someone just did not think all the way through.
Anyway, *those* were rated, listed, labeled, and approved for 'Indoor Use'.