the composition of the facades is based on two different materials.
in the first solution [A] i propose the use of glass panels and porcelain slabs.
in the second solution [B] marble slabs and metal panels.
in the perspective you can appreciate the different effects.
all the elements are of commercial sizes and can be easily founded on the market.
different materials e/o colors can be used in relation to the surrounding contest, to the budget and to your taste.
the elements of the facade can be also easily rearranged in case of different interiors.
the AC unit (i suppose one unit for each apartment) are installed in prefabricated concrete boxes.