A 2.5 ton ductless split system is a type of air conditioning system that is designed to provide cooling and heating to a single room or zone. It is a self-contained unit that is mounted on the wall and consists of two parts: an outdoor condenser and an indoor air handler. The outdoor condenser contains the compressor, condenser coil, and fan, while the indoor air handler contains the evaporator coil, expansion valve, and fan. The system works by circulating refrigerant between the two components, which helps to regulate the temperature in the room or zone. The system is highly efficient and can be used to provide both cooling and heating in the same space. It is also easy to install and requires minimal maintenance. Additionally, the ductless split system is quieter than other types of air conditioning systems, making it an ideal choice for those who want to maintain a comfortable temperature without disrupting their environment.