What Is a Mini Split?

A mini split is a ductless heating and cooling system made up of an outdoor unit and one or more indoor units. It’s commonly used to heat or cool individual rooms, additions, apartments, or homes without existing ductwork.

Quick Scoop

Mini splits work by moving heat rather than creating it from scratch, which is why many models are efficient for both cooling and heating. They also let you control the temperature of each indoor zone separately, which is a big reason people choose them.

How It Works

• Outdoor unit: Contains the compressor and condenser.
• Indoor unit(s): Blow conditioned air directly into the room.
• Refrigerant line: Connects the units and transfers heat between them.

In cooling mode, the system pulls heat out of the room and sends it outside. In heating mode, many mini splits reverse the process and bring heat indoors from outside air.

Why People Use Them

• No ductwork is needed.
• They can be more efficient than some traditional systems.
• Each room or zone can have its own temperature setting.
• They’re popular for renovations, additions, and smaller spaces.

Types

• Single- zone: One outdoor unit connected to one indoor unit.
• Multi-zone: One outdoor unit connected to multiple indoor units.

Feature	Mini Split	Central HVAC
Ducts needed	No	Yes
Zone control	Usually yes	Limited
Best for	Small spaces, additions, ductless homes	Whole-home climate control

Bottom Line

If you want flexible, room-by-room comfort without installing ducts, a mini split is often a strong option. It’s basically a compact, ductless heat pump system designed for targeted heating and cooling.