Sound insulation of geothermal heat pump in the technical room

Thank you for the graphic, but the geothermal heat pump is already installed and the ground is also completed accordingly...

And? There is definitely no underfloor heating beneath it. Depending on how strong the vibrations are, it was worth it to me. Although it should even be checked whether the installer was asleep and therefore has to fix it himself.

Why isn't it just standing on the screed like every other WP? I've never seen anything like that before

Ok, thank you so far. I understand that the floor connection could be optimized.

Are there any other possibilities for airborne sound, see my initial question?

Soundproofing or reduction consists of several components. You could install a soundproof door. However, it only makes sense if the walls do not let through much sound. Also, potential issues with temperature and ventilation should be considered if you seal the room. Do you have a [Controlled Residential Ventilation]? Sound transmission can also occur here... Whether you can "enclose" the heat pump, I would rather clarify with the manufacturer. Heat buildup, etc.

Thank you. I was more concerned with tactics, optimizing directly at the heat pump (possibly expensive enclosure with the manufacturer) or optimizing the room with on-board resources.

I will start with the manufacturer.