What is the definition of a mini-split HVAC system? A mini-split HVAC system is a type of air conditioning system that provides efficient, zoned conditioning within a single living space. Unlike traditional air conditioners, a mini-split system does not require ductwork for installation, making it an attractive option for those looking to install a new cooling system without the expense of a full-scale HVAC installation. A mini-split system consists of two main components: an outdoor condenser unit and an indoor evaporator unit. The condenser unit houses the compressor, condenser coil, and expansion valve. The evaporator unit is typically mounted on the wall or ceiling and houses an indoor coil, fan, and air filter to circulate the cooled air throughout the room. The two units are connected through a conduit of copper tubing and electrical wiring. Mini-split HVAC systems are an efficient, unobtrusive way to condition the air in a single room, and