Your classic, central air conditioning consists of one outdoor unit, one indoor unit, and a series of ducts routed through your home. For it to run efficiently—not too powerfully and not too weak—the unit has to be perfectly sized according to a complex load calculation along with many other factors.
But who has time for that? The easiest thing would be to slap an AC unit in each room, run some refrigerant tubes to an outdoor unit, and call it a day.
Okay, that’s simplifying the process just a bit. But that’s basically what a ductless mini-split system is. They’re a foolproof, to-the-point, no-nonsense kind of AC system that will easily relieve you of the summer heat.