Using soundproof / noise cancelling panels to reduce noise of HVAC box unit in guest bedroom ?

Clickclickboom

Hello all,

I have a new build house that came equipped with a HVAC system. When we moved in, the unit was located in the attic and we never accessed it (only for storage).

Recently, we have done an attic conversion, and we now have a guest bedroom where the attic used to be. The guys who did the job liaised with the HVAC supplying company and they sent some people to move the unit in a corner of the room, and we placed a door to hide. "Cosmetically", it looks nice as the unit is now completely hidden.

The problem that we face is that the unit constantly makes a "humming" noise, which is expected of course. The noise isn't that high but loud enough to be a bit annoying, especially when our guests are trying to sleep. In this context, I am looking at options to cover that noise.

I have done a lot of research, including on Reddit, and found that one of the options are to use soundproof / noise cancelling panels, that are usually used for home recording studios. Still, I have some doubts, as I havent found feedback on whether they would really make a difference in the case of HVAC noises.

Has someone faced a similar problem? Did noise cancelling panels make a real difference ?

Any advice on best using those panels ? do they have to wrap the unit or only the walls ?
Or...any other options I could consider?

Thanks a lot.

10-10-20

Hi, so the unit is situated on roof joists with chipboard flooring over them, right? And in terms of structure directly below those joists, what walls are present? Are they solid or stud?

Clickclickboom

https://www.boards.ie/discussion/comment/123725132#Comment_123725132

Hello

Unit used to be located on joist, but post attic conversion, they sticked it to a wall. See picture.

Walls around are solid.