What is the definition of a multi zone mini split air conditioner? A multi zone mini split air conditioner is an air conditioning system that provides cooling and heating to multiple rooms or areas in a home or building. It is composed of an outdoor condensing unit, as well as two or more indoor units, or “heads”, that provide conditioned air to each room. The outdoor unit contains a compressor, condenser and fan, while the indoor unit contains an evaporator and fan. The outdoor unit pumps refrigerant to the indoor units, which then cool or heat the air. Each head is independently controlled so that different areas can be individually cooled or heated. The multi zone mini split air conditioner is a great choice for homes or buildings with multiple rooms or areas that need to be kept at different temperatures. The system provides efficient cooling and heating, is easy to install, and is more aesthetically pleasing than a window unit. It is also more energy efficient than a window