When you want to install a split air conditioner on the wall, first thing you will need to do is drill a 2-3 inch hole in the wall. In this small hole you will put the hoses and conduit. This is then going to be connected to the hoses and conduit in the inside unit. So the answer is yes. Split Ac’s need a hold in the wall.

There are other types of installation that do not require a hole on the wall. If you want the split air conditioner to be suspended from the ceiling, this will only require two or three metal rods that carry the weight of the ac unit. It is a popular choice because air moves about easily and freely. The cold air will also be evenly distributed in the room, and the walls of the room are left untouched. Read more at splitacunits.com