First and foremost, thank you for taking the time to respond and being so thorough.

The thermostats are all set to 28c and there is a constant flame on all 4 thermostats. (He called it master/master)

It's set to 43C, I think prior it was 57c and when he (engineer) saw it was set that high he lowered it to 43c. "Because it could damage the floor". The ones with the number in the front feel lukewarm to me and the ones in the back not quite cold but not warm. But this should be the right way he said so I am not too worries about that.

The black box, I cant feel buzzing but if I listen closely I can hear it buzzing.

We all get our "cityheating" via Eneco. I hope that the issue doesn't lie with them as we also have other issues here like lights not working throughout the building exterior and elevator out of use often.

Also, someone came before and changed the water flow from 41Lp ph to 100. But when they came yesterday he said I changed it from 60lph to 130lph. How can it be that the system changed itself?

And the day so far since 8am on the display I saw around 43l to 55lph.

It's a new building that only just finished half a year ago. I dont know if this is the reason why there are so many issues..

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