I think the unit not really that loud sound. It is probably

1) the base and the wall around the unit reflect and echoing the sound. That cause the unit sound louder.
2) The placement space is small and almost surround by wall. It is like speaker box.
3) It is 1.5hp unit. The running sound is a bit higher.

I notice they don't read the manual before install. They expecting all the aircon is the same. Regardless the new type or old type.

If the unit come in 1st, I will go through the manual.

Than instruct where to locate and what I want. So I don't give them any chance simply what they want to do.

They sure will comeout a lot of excuse. I just counterback. Till they no choice but have to do it.

Everybody can do. I know mostly people lack of skill.

You just need to read the manual and comeout your prefer choice.

If they excuse a lot, the manual is your skill.

Sometime win win agreement also ok la. Not too keras lor.

I have experience when blindly follow them, than when problem time or service, another guy will said the installer put wrong la, not correct la, shouldn't do that la and cause I cannot take down your unit la.

Macam macam have. Sian.

Why you buy not famous aircon brand?