Construction costs are currently skyrocketing

Then buy a sensor and you will be amazed at what the controlled residential ventilation system does ...

Throwing the window wide open is probably only due to habit depending on the individual situation and perceiving the incoming "colder air" as fresher air....

This is not generally due to a controlled residential ventilation system, but rather to a poorly planned controlled residential ventilation system. Small difference with massive consequences.

I wouldn't be so optimistic, but the trend is clearly noticeable. Let's see if we reach the May values on the 10-year swap as early as next week or not.

I also believe that this will not happen quickly. But at least the risk of further rising interest rates is off the table in the short term (at least until the next inflation figures)

What must be considered? Or what can be planned incorrectly?

Incorrect air exchange rates planned in the bedroom (e.g., just 1x supply air and that’s it). Overall, the design only accounted for two people, but there are actually four people in the house. Poor positioning of the ventilation openings. Etc.