These are strange units. They are ducted air handlers hanging above the drywall but they still get low voltage power from the condenser like the wall hangers. I am not really sure what the advantage is. The duct work would seem to eat any energy savings you get from a mini split. We are just watching this job for the GC and I haven't really talked to the owner but this was his idea. The condensers are hanging on the walls about 18-20 feat above the ground. (Flood is 16')
The GC has not really decided how the access will be provided.
This is one of the air handlers.

[Linked Image from gfretwell.com]

Greg Fretwell