hi all, noob question here.

I am planning to install plaster ceiling in my apartment, but I noticed most of the residents here have their plaster ceiling cut to accommodate the aircond like this. (sample picture only)

I do not like this & think it's an eye sore. FYI, the aircond is supplied & installed by the house developer.

Before I install the plaster ceiling, can I move the aircond lower so my plaster ceiling will be full instead?

Or moving the aircond lower will require to redo all piping & wiring? hence the reason most people do not do this (more hassle & high cost, etc).