Wall to the utility room made of calcium silicate brick?

Hello,

since we will not have a basement, the utility room (with gas heating, residential ventilation, washing machine, and dryer) will be located on the ground floor. Does it make sense to build the wall to this room out of calcium silicate bricks instead of clay bricks? Calcium silicate bricks are said to have much better sound insulation, but one also reads that different types of masonry blocks should not be mixed. Or is there another solution?

Best regards
Sabine

Make the walls thicker and above all, make sure that the door is properly installed.. otherwise the thickest wall is useless.

Let's put it this way: Between our bathroom and the bedroom is the dressing room (without a door to the bedroom) and drywall. If someone is showering in the bathroom, you can hear it very clearly in the bedroom. Our utility room has solid sand-lime brick walls, we have a Schallex door (nothing special, basically the entry-level in soundproofing). I think that helps a lot. Especially the controlled residential ventilation is not very quiet, but outside the utility room it cannot be heard. Ask about the interior plaster, it contributes significantly to soundproofing (just by its presence). Here, only thin plaster/spackle is applied, I didn't know that beforehand. Therefore my recommendation: solid walls and Schallex door.

How many hinges does the door have - is that a special frame? We do have KS walls, but unfortunately you can still hear the humming of the heat pump in front of them.

We had the frame for the technical room (WP) and the bathroom (Waschmaschine/Trockner) made with solid chipboard and sound insulation, and asked the installer to foam the frame not only spot-wise but completely. This brought quite a lot of benefits without much additional effort.

?..That has brought quite a bit without much extra effort.

Compared to what?
We have the hallway open to the living area, without a door or wall. No preventive measures for soundproofing installed on the ground floor.
Walls in the hallway and to the rest are Poroton 11.5 cm.
There is nothing we hear from the utility room (corner room between hallway and kitchen). Only our refrigerator makes humming noises – or when the door is opened. Oh, also a completely normal standard door.
Heating and controlled residential ventilation in the utility room...

Regards