Going from memory here for my shop AC. It's a window unit, seems like the plate said it will run on 208V or 240V and rating was 28,000 BTU on 208V & 28,500 BTU on 240V. It's jammed through the wall and sealed around it with foam crammed into the voids so I can't read the spec label on the side or I would check it again.
Interesting stuff for sure. When I wired my shop I did overkill on everything from the number of 20A 125V circuits for the plugs to the welder, AC, electric heat & compressor runs in terms of wire gauge. Low volts is way bad for air compressors.