The internal heat exchanger for indoor units for split
AC is where heat is transferred from the room to the refrigerant gas. A fan
inside the interior unit circulates cooled air into the space. Split system air
conditioners have an exterior unit and a main inside unit that are connected to
each other. The condensing coil, fan, and compressor are found in the outdoor
unit, while the evaporator coils and a filter are found inside. Indoor units
for split AC have an exterior unit and a main inside unit that are connected to
each other.