Automation of a controlled residential ventilation system (ventilation system)

Because a controlled residential ventilation system should remove the old, used air to the outside and not distribute it inside the house.

The idea is to distribute the heat from the fireplace through the controlled residential ventilation in the house. On the one hand through the airflow, on the other hand through heat recovery from the exhaust air. Steffen says it doesn’t help or the effect is not noticeable.

Hmm, so my supply air in winter is always only about 2-3 degrees cooler than the exhaust air. So I wouldn't say that it's useless.

The heat recovery actually works very well, I would say.

You can't cool with the [Kontrollierte-Wohnraumlüftung] though...for that there are air conditioners...and as already mentioned, maintaining the temperature at a certain level is only possible to a limited extent.

If the heat is inside, then it's inside.

My suspicion is not that I can cool the house down from 28 to 21 degrees. That doesn’t really work anymore with the current scorching heat, even with night ventilation. What I do believe, however, is that I can at least slow down and reduce the heating up of the apartment/house. At least that’s what my experience with evening/night/morning ventilation tells me. That might only be 0.1 to 0.3 degrees per day, but that already results in having a few more days of tolerable temperatures. And with a well-automated controlled residential ventilation system, I would assume that it can be optimized even further. With a heat exchanger, it should work even a bit better.

A ventilation system is solely there so that you no longer have to ventilate yourself. Just as a ventilation system does not get heat from the house in summer, it also does not lose heat in winter. The "heat is stored in the wall," not in the air (which is why heat recovery is basically a gimmick). Air can generally store very little potential heat. That is why you don't really lose heat if you briefly ventilate in winter and then wait 2-3 minutes. It is then basically just as warm as before. And it’s the same in summer. Modern houses initially don’t let the heat in at all. But once it is inside, it is hard to get rid of it again. Basically, only a full cross breeze with windows wide open or a real air conditioner helps. A ventilation system ventilates a relatively small amount of air per hour. It is enough to dry the bathroom after showering and normally nothing else molds. But not more than that. A tilted window already achieves more than the system... The automation of the ventilation system is just as much a gimmick as the permanent control of underfloor heating: completely pointless. Only the "extra ventilation" in the morning after showering somehow makes sense if you really want to. Our system has been running on level 2 (standard setting) for 3 years and there has never been a situation where that was fundamentally wrong. We are enormously annoyed that we did not prepare or even order an air conditioner back then. We even asked about it, but it was dismissed as nonsense because the ventilation system would apparently do that. And of course, that is nonsense. In reality, the [sanityp] probably had no idea about air conditioners....

Our system has a summer setting. It does not bring in any supply air into the house when it is warm and opens again as soon as the outside temperature drops below the indoor temperature in the evening. With the summer setting, there is no heat recovery.

This afternoon we had a nice 22 degrees in the house. It was warmer over the weekend, as the terrace door was open at noon.

Curious to see how it will continue in summer. The systems are not air conditioners, they can only delay.