Bedroom too warm - despite the heating being off

When it comes to noise, rather not. Allegedly (I have no personal experience with this, but have read reports several times) the decentralized fans directly in the room are already audible. There is still the possibility to insulate inward. But without air exchange, it will always be stuffy and warm in the morning with two people even in 17 m². You also produce heat. Slightly less during sleep, but still. Human bodies are heaters.

What do you think of such inventers, that is, a decentralized ventilation only in the bedroom? Does that make sense to cool it down a bit without windows?

That’s not an option for you since you wrote you need absolute silence.

When it comes to noise, rather not. Allegedly (I have no personal experience with it, but have read reports several times) the decentralized fans directly in the room are already audible.

That doesn’t apply to you since you wrote you need absolute silence.

Well, I had hoped that it would at least be quieter than hearing cars passing by an open window (+ possibly "seeing" them, since the blind would then have to be somewhat open and you could see the beams of light). We live on a fairly busy street... Currently a dream, because at night almost no one is out due to the curfew ;) It's more when falling asleep, but you could otherwise start such an inverter with a timer only 1-2 hours after the time to go to bed?!

Yes, that is possible. But if you already have air conditioning, in my opinion unnecessary (or was that irony?). You should also be able to simply set it to ventilation (without or with very little cooling).

Hihi, yes exactly because we prefer to sleep a bit cooler we have one specifically for the bedroom. It’s just kind of crazy to run the air-water heat pump on one side to warm it up. And on the other side of the house the AC is running at the same time to cool it down o_O

Well, welcome to the world of energy saving ordinance houses. If you want one, you have to like the other too.

It’s more when falling asleep, but you could also start such an inverter with a timer 1-2 hours after bedtime, right?!

If you’re a light sleeper you will definitely be disturbed by it. Imho, fan noises while sleeping are almost worse than temperatures. Besides, you’re only exchanging the air with that. Cooling is more or less non-existent.

So 18 degrees should be achievable if the neighboring rooms have 21 to 22.

I would first check if the [ERR] are connected correctly. You wouldn’t believe how often something gets mixed up there.

So open the [HKV] and manually turn off the entire bedroom. Then measure floor temps with IR to make sure it was the right [HK].

Then we’ll talk again! :)