What is the definition of a mini splits heat pump? A mini splits heat pump is a type of ductless heating and cooling system that uses ductless mini split heat pumps to provide heating and cooling to individual rooms in a home. The mini splits heat pump consists of an outdoor unit that contains a compressor, an evaporator, and a condenser, and an indoor air air handler unit containing a fan and an evaporator coil. The compressor is responsible for circulating refrigerant through the system, while the evaporator and condenser are responsible for transferring heat energy. The fan in the indoor air handler unit circulates air through the evaporator coil, which condenses the refrigerant and releases heat energy into the room. Mini splits heat pumps are energy efficient and can be used to provide both heating and cooling in a single room or throughout an entire home. They can be used in a wide range of climates and temperatures and are relatively easy to install. Mini splits heat pumps are becoming increasingly popular due to their