"Ductless mini splits are designed to provide quiet, efficient cooling and heating. A mini split has an outside condenser unit and at least one indoor blower unit mounted on the wall or ceiling which provides point-of-use air conditioning in the room where it is installed.

Split systems can be used in single zone or multi-zone applications. A single zone has one indoor and outdoor unit and is designed for use in a single room or area. A multi-zone split system combines a single outdoor condensing unit with up to four indoor units, each of which works independently and can be set to different temperatures. Multi-zone systems are most often used to cool multiple areas in a home or business."

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https://www.furnacecompare.com/air-conditioners/is-a-mini-split-right-for-you.html