Atypically high offer for ventilation system

The TE is building now and presumably has an even higher interest rate than YPG and me (back then about 3%).
If with us the special repayment already has double effect, every additional euro of loan now should amount to more than double.

Whereas in contrast to private home construction calculations are precise, the use of central ventilation systems has long been established. Nobody fantasizes about the fitness aspect there; it simply means: We can only afford this building WITH central ventilation.

So whoever just wants to repay (in special installments), installs something like this. Whoever wants to enjoy life, anyway.

The question is (because a ventilation system does not replace heating): how much electricity does a ventilation system consume?

Presumably not as much as is saved. But if you are really interested in energy savings, that's only half the truth. You also have to include the production, operation, and the additional effort for raising the ceiling. However, supporters in this or other threads have never provided figures for this. Financially, it will never pay off... Whether the energy input balances out the energy savings, no one can say. So the only things that remain are the time spent on ventilation (which at least for us is manageable) and the better air quality, which I have never disputed.

Whoever wants to enjoy their life, eh.

He would rather take a few more vacations for 40K€. Would you also base your choice of employer on the presence of a ventilation system in the office, even if the employer pays significantly less?

Where, in contrast to private house building, precise calculations are made, the use of central ventilation systems has long been established. There, no one fantasizes about the fitness aspect but simply says: We can only afford this building WITH central ventilation.

But there, the trouble saved due to mold is also factored in when the apartment has forced ventilation. While in the owner-occupied home, every dispute about whether the owner or the occupant is to blame for the decay is avoided, and any costs are basically paid by oneself anyway. PS to the muscle beast: this interest calculation is not serious. You don’t calculate when having a beer in the pub that you could instead invest the money at 8% for 50 years and are actually drinking a beer for 100€.

It will never be financially viable...

The Earth is flat...

Currently, here in Munich, the admission of the spherical shape is preventing one of the largest municipal buildings – because the city simply continues to say, "The Earth is flat, prove me otherwise." A municipal building is to be planned, the client is the city, the user is the city – but the two floors are to be used by different city institutions. All good, heating and ventilation planning is finished – but regarding the energy recovered from the exhaust air (which, according to Musketier, does not exist, but in reality is huge), it is currently not possible in the ventilation system to distinguish whether it originates from institution A or institution B. The city’s proposal: Then just leave out the ventilation system with heat recovery! Ha, very clever idea, now not only will the operation become massively more expensive but also the construction, because then heating etc. must be designed completely differently.

So yes, in the early Middle Ages, similar mental contortions were used; back then, it was considered normal to spend one’s life crawling, sitting, and coughing in the house. At some point, people saw that those with the newfangled fireplaces in the house could also stand, lie in bed, and generally have hobbies other than coughing. This insight is still pending for the window ventilators.