The definition of a HVAC split system is a type of heating, ventilation, and air conditioning (HVAC) system that utilizes two separate units to provide comfort in a home or business. The two units are the outdoor condenser and the indoor air handler. The outdoor condenser contains the compressor, condenser coil, and fan. The indoor air handler contains the evaporator coil, blower, and air filter. The two units are connected by refrigerant lines, which allow the refrigerant to move between the two units. The outdoor condenser is responsible for transferring heat from the outside air to the refrigerant, while the indoor air handler is responsible for distributing the cooled air throughout the home or business. The HVAC split system is an efficient and cost-effective way to provide comfort in a home or business. It is important to ensure that the system is properly installed and maintained in order to ensure optimal performance and efficiency.