A split unit AC and heat is a type of air conditioning and heating system that consists of two separate units: an outdoor unit and an indoor unit. The outdoor unit houses the compressor, condenser, and expansion valve, while the indoor unit houses the evaporator and fan. This type of system is ideal for those who want to maintain separate temperatures in different areas of their home or business. It is also ideal for those who want to save energy, as the two units can be used independently to cool or heat specific areas. The outdoor unit can be used to cool the entire home, while the indoor unit can be used to cool or heat specific rooms. This type of system is also more efficient than traditional central air conditioning and heating systems, as it requires less energy to operate.