Anyone knows? I was told that the piping can be hidden within the lbox or false ceiling and it will look nice. however, some others also told me that if the piping leaks, then i would need to redo the l box or false ceiling so it's better to do the lbox and false ceiling after the air con is installed. What's the best way to do so as I intend to install a system 4 and place lbox/false ceiling in all my rooms. thanks!