Mitsubishi Heavy Industries Thermal Systems, Ltd. has developed new models of multi-split
inverter system air conditioners for buildings in very hot regions, and started selling them in
December 2015. The upper limit of the operable outside temperature has been elevated to 52°C
from the previous KXZ standard level of 46°C. Enhanced efficiency and diversified options for
operational control have realized better energy-saving capability. The features and specifications of
the new models are introduced below.