Floor plan optimization city villa + fill consideration

We cannot think of everything. We have not yet dealt with the topic

But while you are fiddling with 149 decimal places here, such essentials have been discussed multiple times here (in threads only about controlled residential ventilation). You would have just needed to hop over the fence. Simply put, "decentralized" means that such a system must be built once in each affected room and operates "standalone," while the central variant only has one control system for the entire house and effectively "pools" its effect in all rooms. Heat recovery is therefore significantly more efficient centrally, but: central also means a squid-like duct system throughout the entire house. That is why only such a drywall-fearless weak checker like your planner is so naïve as to leave this principle decision open until the last minute.

But while you’re puzzling over 149 pages after the comma here, such essentials have been discussed multiple times (in threads only about controlled residential ventilation). You just would have had to jump over the fence.

I just missed that. I can’t change it. It’s annoying, yes. The decision was not kept open until the last moment. We only just realized that we would prefer to have a central ventilation system.

What do you mean by drywall? Can’t it be done in the floor structure or in the concrete on the walls? Do you inevitably have any boxed enclosures if you only plan it after the layout is completed?

Currently, we have a decentralized ventilation system without heat recovery included in the house prices. A central system with heat recovery would mean an additional cost of 9,500 euros. Is that price okay or overpriced?

What do you mean by drywall?
Isn't that done in the floor construction or in the concrete on the walls? Do you necessarily have any boxing if you plan it only after the floor plan is finished?

Essentially, it takes place in the floor construction. But central is different (= more complex to duct) than decentralized. And you have a planner without a plan, whose spatial imagination can't quite process rethinking a BD into a DD of the floor below. In the plan, this does not yet cause mandatory drywall work, but probably in the then improvised reality.

Basically, it all happens in the floor structure. But central is different (= more complex to channel) than decentralized. And you have a planner who can't quite process spatially to rethink a BD into a DD of the underlying floor. In the plan, there are no mandatory re-dry constructions yet, but probably in the then improvised reality.

He probably didn't put any more effort into this one version because he thought it wasn't worth it anyway. He was probably already annoyed with us.

What is your advice? To do without the central and take a decentralized one because the planning is easier? Everywhere I read that a central one is to be preferred in new construction.

He was probably annoyed with us by now.

And now he's back from vacation and ready for new annoyances?

What's your advice? To do without the central unit and take a decentralized one because the planning is easier?

No, the decentralized one is not easier to plan: that applies to the breakthroughs, but to the planning of the system as technical stuff, on the contrary. Regarding heat recovery, I already said that the central one is more efficient. Unless at least 30% (by volume) of the rooms are to be excluded, the decentralized one is, in my opinion, advanced nonsense.

And now he's back from vacation and ready for new annoyances?

Because it’s the final stage, maybe he’s putting in more effort to get rid of us?

Do you or anyone else notice anything negative about the attached drawings? BD/DD realistic?

And again about the central unit: what could happen in the worst case with planning errors? I mean, why should there be difficulties with laying it in the ground? How likely is that and how badly would it look then?