Ventilation system in single-family house without effect = planning error?

The electric preheating elements are, however, a quick and easy way for manufacturers to shirk responsibility. These should actually be banned. There are better methods regarding the saving effect since these are passive, but they increase the cost of the system and for that reason they are rather rare. Because the house buyer/house builder/general contractor always only looks at the price.

Yes, unfortunately I did not really engage with the topic much before the construction. I only learned about the "air well" during the construction phase. If I had known about it before, it definitely would have been integrated!

If you have the pump in the boiler set to automatic operation, the pump output usually increases when it gets colder. This then requires more electricity.

If you have the pump in the boiler set to automatic mode, the pump power usually increases when it gets colder. That then uses more electricity.

That can of course be the case - unfortunately, I have no idea about that, and judging by the installer, he doesn’t either. So I’m hoping for the Wolf field service on 18.2 and adding that to "the list".

Ok, as I already suspected, I had a wiring error with the power measuring sockets - the ventilation was connected behind the heater - which of course makes (no) sense o_O The heater therefore does not consume excessive power. According to the app, maybe 15-20% more than usual, which is completely fine. (approx. 0.8kWh per day) All the more I am annoyed about the power consumption of the ventilation system. :mad: One could have just worked with an air well or something similar, then this problem would probably be more or less history. Now the controlled residential ventilation currently consumes about 800-1000 watts during operation (at -12°C outside temperature). I have reset the flow rate in normal operation back to (the factory-set) 150 m³/h, hoping that the air quality will not suffer too much, but the air quality meter will tell me that... And my own nose should also "indicate" that. Attached again is the power consumption, which has obviously increased enormously since it has been below 0°C outside

One would have only had to work with an air well or something similar, then this problem would more or less be history.

You have a project for the summer.

With that, you have a project for the summer.

Unfortunately, it won't be that easy for me: The controlled living space ventilation system is located in the attic and we have underfloor heating everywhere. So getting through the house will be difficult. You would somehow have to get through the garage along the exterior wall, and I assume that over the length of the connection, the "air purification and tempering effects" would probably be minimized and promise little success. It simply wasn't planned for, and the plumber, for example, doesn't know anything about something like that.