​ The LG Prestige ductless heat pump is one of our favourite ductless mini split models. Here are the top reasons why the LG heat pump has been one of our goto units. - Efficiency Rating There are two primary heat pump ratings used to compare different models and brands.      - HSPF (heating seasonal performance factor)      - SEER (seasonal energy efficiency ratio) The higher each of these ratings is the more efficiently the heat pump can move heat from outdoor ambient air into your home.