The Mitsui air conditioner without external unit, was created to satisfy a whole series of system and installation needs, which would not be possible with traditional Split systems. It finds particular use in historical centres, apartment blocks, hotels, prefabricated structures and structures subject to fine arts restrictions.

This unit can be installed either flush with the floor or wall. It is obligatorily positioned along a perimeter wall where a core drilling machine is required to make the two holes for the external air intake and expulsion connections. The model is loaded with R32 refrigerant, with a power rating of 12000Btu/h.