Construction costs are currently skyrocketing

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

Maybe I also had too high expectations. Especially in the bedroom, the air is quite stuffy in the morning if the window is not opened. Unfortunately, I cannot turn up the system any higher either, as the developer refused to provide 2 supply lines for the outlet, since this was not included in the manufacturer's planning. It then becomes too loud...

Especially in the bedroom, the air in the morning is quite stuffy,

This is not generally due to a controlled residential ventilation system, but due to a poorly planned controlled residential ventilation system. A small difference with massive effects.

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

Can you rely on it if Zehner designs the system? Or does it need to be specially checked?

Can you rely on it if Zehner plans the system?

The manufacturer should actually be able to do it according to your specifications.

How long one could pay rent until a house pays off is very individual and very different. You would have to take all construction costs, interest, and fees here and divide them by a local customary rent. For us, it would probably be something between 2 and 3 years. However, neither value increases nor value decreases are taken into account.
But basically I understand your argumentation, although I do not find this example so fitting

For us, it would be about 60 years :eek:

For us, it would be about 60 years :eek:

Then you either calculated poorly or have an expensive loan, or rents are still very cheap where you are.

I once estimated that with the interest paid in the first 10 years (due to the fixed interest rate being a smaller component), you could rent a comparable house for three years. That was enough for me to tackle the project. Acquisition costs, additional costs, etc. of course reduce the cost savings, but there is still a lot of room there.