The definition of a mini split ductless heat and air system is a type of air conditioning and heating system that is an alternative to the traditional central air conditioning and heating system. It is a great option for those who are looking for a more efficient and cost-effective way to heat and cool their home. Mini split ductless systems are composed of two main components: an outdoor condenser and an indoor air handler. The outdoor condenser is responsible for collecting and condensing the refrigerant that is used to cool and heat the air. The indoor air handler is responsible for distributing the air throughout the home. This system is highly efficient and cost-effective, as it does not require the installation of ductwork, which can be costly and time-consuming. Additionally, mini split ductless systems are more energy-efficient than traditional systems, as they allow for zoning, meaning that you can set different temperatures in different areas of your home. This allows you to save energy and money by only heating and cooling the areas that you need. Overall, mini split ductless systems are a great option for those looking for an efficient and cost-effective way to heat and cool their home.