A ductless split air conditioner or heat pump is still similar to a central air conditioning system because the compressor is outdoors and a major benefit, that the ductless air system offers, is zone control, which results in energy savings. Only the energy to meet the load demand of each room or zone is required at any time. The cost of these air systems are more expensive than a typical central unit because the unit is complete with the evaporator blower and filters combined in one package
Ductless Air Systems
It is unlike a window unit, because there is no unsecured window with an air conditioner in it, nor do you lose the use of a window for fresh air or for viewing. Ductless air systems comes in a variety of design and colors.