A heat and air split unit is a type of air conditioning system that is used to both heat and cool a space. It is a combination of two separate systems that work together to provide both heating and cooling. The split unit consists of an outdoor condenser and an indoor air handler. The outdoor condenser is responsible for the cooling process, while the indoor air handler is responsible for the heating process. The two systems are connected by refrigerant lines that transfer the heat or cold from one system to the other. The split unit is a great option for those who want to have both heating and cooling in one system, as it is much more efficient than two separate systems. Additionally, it is much easier to install and maintain than two separate systems.