There are few ways to cover the pipe to make the air con system looks better
> Install Trunking to cover the pipe
Install white trunking can protect the pipe and at the same time , it make your living area looks tidy. Also if there something wrong with the pipe, they can open the trunking and fix it easily.
> Build- in pipe, drill the wall and hide all the pipe inside the wall
Looks nice, but it create lot of dust while they process it. But it is also costly.
> Wooden frame work
It process can hide all the pipe and also the air con inside it. It is easy to take care while the air con have problem.