Mitsubishi Electric introduces the Hyper-Heating INVERTER  MXZ multizone outdoor unit for residential applications at 19 SEER. A single multizone outdoor unit is capable of connecting up to eight indoor units, making it an ideal solution for whole-home cooling and heating in extreme cold climates. Available from 22,000 to 54,000 Btu/hr. capacities, the Energy Star-qualified H2i MXZ features 100% heating capacity at 5° F and guaranteed operation down to -13°.