A ductless split system HVAC system consists of one outdoor unit and one indoor unit connected by refrigerant tubing and electrical wiring in its most basic form. The indoor unit is typically wall-mounted and delivers heated or cooled air directly into the living space, eliminating the need for ductwork. This is known as a single-zone system, and it is intended to provide heating and cooling comfort to a single area. To provide comfort for an entire home, a ductless split system HVAC system combines one outdoor unit with five indoor units. Ductless HVAC systems are one of the easiest and most versatile systems to install due to the variety of indoor unit styles available. That installation only requires a hole in the wall for the wiring and refrigerant line.