Multiple Rooms, Multiple Temperatures
Multi-split systems mean that a single outdoor unit can cover multiple internal units. 

Space Saving Installation
Multi-splits benefit from a wide model variety, with wall mounted, floor standing, ceiling cassettes, and bulkhead devices.

Individual Room Controls
The wide variety of internal units that can be used to maintain different temperatures throughout a building, and limit which rooms are cooled at a time.

Excellent for Expansions and Renovations
The ability to have multiple internal units set-up and run from a single outdoor unit means it's easy to expand a building's AC system to fit any new additions.