You only hear the noises at the heating circuit distributor if you have air in the system. Although it is not generated there, due to the minimal insulation there it is the loudest.
From the distributor, all circuits for the apartment initially run. So you may have an area in front of the distributor where the cables are extremely dense. That’s why the room where the distributor is located definitely gets a bit warm. For me, who also likes to sleep with the window open in winter, the distributor in the bedroom would therefore be a no-go, but it would be well placed in the bathroom.
How much of a difference does that make? Really noticeable? Then I probably need to talk to the technician again in our case.
They make no noise. We have 4 pcs. distributed throughout the house (2x ground floor, 2x upper floor). Each one more because of the second heating circuit distributor for "hot" radiators (towel, attic, garage, etc.).
Yes! My brother has the HKV pipes running directly through the bedroom and is very annoyed about it. We have the HKV for the upper floor in the hallway.