Have you ever heard of a mini-split AC and heat system? If not, you’re not alone. A mini-split AC and heat system is a type of air conditioning and heating system that doesn’t require ductwork. It’s a great solution for people who don’t have existing ductwork or don’t want to install traditional central AC systems. So what is the definition of a mini-split AC and heat system? A mini-split AC and heat system is a type of air conditioner and heating system that doesn’t require ductwork. Instead, it uses individual air handlers mounted on the walls of the rooms that need to be cooled or heated. The air handlers are connected to an outdoor compressor/condenser via refrigerant lines that run through the walls. This system delivers heated or cooled air directly to each room, eliminating the need for ductwork. Mini-split AC and heat systems also tend to be more energy efficient