Multi split system, unlike a regular split system, consists of several elements. As a rule, this is one external unit, to which several internal hair dryers installed in different rooms are connected, and you can combine different types of blocks. For example, in one room you can use a wall inner block, in the second-channel (behind a suspended ceiling), in the third-floor, while the aesthetics of the appearance of the facade of the building do not suffer due to a large number of external blocks.