Each indoor unit in a mini-split air conditioning system is designed to cool a specific room. To keep multiple rooms and areas of your home cool, especially during the hottest days, you’ll require multiple indoor blower units. Each one of these units represents a “zone”.
A multi-zone system refers to ductless air conditioning that includes inside units in several areas of your home. Up to 5 units are connected back to a single outside AC condenser. This is ideal when you want to cool multiple rooms but don’t have existing ductwork.