Ductless mini split heating and air conditioning systems are more energy efficient than traditional HVAC systems and 40% more efficient than standard window air conditioners. No matter the size of the room you want to regulate, ductless air conditioning systems from Mitsubishi Electric provide the flexibility and energy efficiency to keep your house comfortable. These compact air conditioning units fit almost anywhere and don't require a duct or window. Consisting of an indoor air-handling unit and a slim-line outdoor condenser unit, they can be installed in tight spaces, recessed, or even suspended from the ceiling.