Ductless air conditioning (AC), also known as mini-split systems, is a cooling system that provides a flexible and energy-efficient alternative to traditional central air systems. These systems don’t rely on ductwork to move cool air throughout the home. Instead, they use an indoor and outdoor unit connected by refrigerant lines and electrical wiring. Read this before you buy a ductless AC , Mini-split heat pumps also operate without a system of ductwork, reducing the installation difficulty and cost. This system consists of a wall-mounted indoor unit and an outside condenser, similar to an air conditioner., Mini split air conditioners work well in apartments and buildings where duct work isn’t present or would be too expensive to install. Ductless mini splits are also ideal if you’re looking for a small AC unit or you need to heat and cool a room independently from other areas., , , .