HERE'S HOW IT WORKS
Ductless splits, also called "Mini-Splits" pump cooled or heated refrigerant directly to the wall or ceiling-mounted air-handling unit, and each unit has its own wireless electronic temperature control system, a.k.a., a remote.
Here's how the system works in a single room application
1. The indoor unit uses refrigerant to cool or heat air and quietly pushes the chilled air it where you need it in your living space.
2. Refrigerant and electrical lines connect the outdoor unit to the indoor unit through a 3" opening in the exterior wall.
3. The outdoor unit's state-of-the-art heat pump cools or warms refrigerant and sends it back inside to the air handler, which continuously monitors the room for changes in temperature and sends conditioned air to the areas of the room that need it.