2- zone Hyper-Heating Mitsubishi MXZ3C24NAHZ outdoor unit featuring the newest member of the Mitsubishi ductless family...MSZ-EF12NAS (silver) and MSZ-EF12NAB (black) "Designer Series" indoor wall units. These units are installed in an upstairs and downstairs office; this setup allows completely separate control of the temperature setting in both areas. Also, the Kumo Cloud adapters on these units, allows the business owner the ability to ensure the utilities are not over used during any unoccupied time-frame via the free web-based app.