What is a split, ductless system?

Most people are familiar with central air conditioning systems that have an outdoor condensing unit and an indoor (evaporator) unit which is usually located in the attic or the basement. With this type of system, the cooling is accomplished by connecting to the evaporator unit a series of ducts which run throughout the house and which carry or deliver the cold air to each room as it is pushed out from the evaporator unit.

A ductless system is similar in that it too consists of both an outdoor condenser unit and an indoor unit. It differs from a central air system in two ways:

1. the indoor unit constitutes both the evaporator system and the air delivery system and actually resides in the room being cooled and
2. the outdoor and indoor units are connected by a small (3”) hole made through the room wall so that no expensive and extensive ductwork is required.

This makes the split, ductless system much simpler and much cleaner as no ductwork needs to be installed.

Schematic showing a potential split, ductless air comfort system in a multi-room residential application
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Mitsubishi Features / Benefits
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