Mitsubishi Heavy Industries Air Conditioning ZGX Hyper inverter wall mounted series. Super High Coefficient energy saving inverter technology (up to 5X input) . Some of the most efficient units on the market. The slim profile indoor unit has a reduced height of 298mm and the new multiple stage heat exchanger is folded to form a surround to the upper section of the fan enclosure. This ensures low air velocity, and reduced sound levels, whilst delivering high performance and efficiency.