The Mitsubishi heat pump is one of our favorite.Mitsubishi uses ductless heat pump technology, also known as a mini split heat pump. Here are some of the reasons why Mitsubishi is such a "top of the line" heat pump manufacturer:Mitsubishi offers two types of heat pump systems that we will be discussing, single zone and multi-zone: Most heat pumps and air conditioners use ductwork and airflow to heat or cool their homes.However the mini split heat pump uses one or more small, indoor units to heat/cool a home or building on a room-by-room basis.Often, these indoor units are installed in various rooms throughout the house.  They are connected to the outdoor unit by means of copper piping carrying refrigerant.Now for the important details related to the Mitsubishi heat pump.... Below is a brief summary of the cooling capacity, physical dimensions, and efficiency of each Mitsubishi heat pump, single zone model. Now a summary of the cooling capacity, physical dimensions, and efficiency of each Mitsubishi heat pump, multi zone model.