Ventilation system CO² [ppm] in your rooms

Do all rooms count towards the calculation or only those that have ventilation (supply or exhaust air)?

The system is running at 70% and therefore the system in the utility room is very loud and also the exhaust noise of the system outside is loud. I am just wondering if that is normal?

Last night I measured again in the bedroom and the value is just over 1000 ppm. Too much, right?

then you will probably have to increase the airflow in the bedroom...

And that then simply goes over the plates of the respective air outlets in the room, I suppose?!

No, that is possible with a new calibration of the system, where the volume flow in the bedroom is then increased and reduced elsewhere.

Of course, it is also possible to do it yourself, but you have to know what to adjust.

And I believe that is also the problem. Such a calibration has probably never really taken place.

Something like that definitely has to be done with a measuring device, measuring at the outputs what then comes out there.

One more thing, can you also hear your controlled residential ventilation system that extremely, I mean in the utility room, or does it also blow so strongly at the exhaust duct that it is really loud outside there?