Overview for Mitsubishi SZ-KD18NAThe Mr. Slim series from Mitsubishi Electric heating and cooling systems are a convenient, single or multi room solution for homes or offices that formerly relied on electric baseboard heaters in the winter and window air conditioning units in the summer. If you are looking for discrete zoned comfort, then a short-run ducted unit is the right solution. As a stand-alone system or connected to a MXZ multi-room system, the SEZ ducted units provide energy efficiency, quiet operation, and a compact design for quick, easy installation hidden either in the ceiling or beneath the floor. All of the 1:1 systems are ENERGY STAR certified, and two systems qualify for the federal tax credit. These systems provide customers with an environmentally friendly indoor unit with a similar installation and familiar style. These SEZ indoor units also connect to MXZ multi-zone systems, providing a wide array of installation options to best fit any application. Ductless heating and cooling systems have been around for over 30 years and are used widely throughout the world.