If you're considering installing a ductless mini-split system, it's important to know the pros and cons of adding this unit to your house. Some pros include it's small so it's ideal to add to single rooms, and you can save money on your utility bills as each zone has its own thermostat. It is also great for increasing your indoor air quality. A con with these systems is their cost. They can run about 30% higher than a central air unit. These units are also more visible than forced-air systems.