Optimization of floor plan for detached single-family house 155 sqm

What is the exact difference amount from HP to HP incl. controlled residential ventilation? And what would be the price for a completely separate controlled residential ventilation? Would the pre-installation be accepted? It’s not that much. You should also address questions, otherwise it will get even more complicated. Did you forget the ground floor?

Air-to-water heat pump without controlled residential ventilation: approx. €32,000 Air-to-water heat pump with integrated controlled residential ventilation: approx. €21,000 SURCHARGE Air-to-water heat pump with separate controlled residential ventilation: approx. €28,000 SURCHARGE

All of course with complete installation including underfloor heating etc.

In the offer with separate controlled residential ventilation, a more expensive air-to-water heat pump was chosen (larger water tank).

I couldn’t respond to the offer yet, since it only came on Friday.

Therefore, I also don’t know if I could only provide pipes.

Air-water heat pump without controlled residential ventilation: approx. €32,000
Air-water heat pump with integrated controlled residential ventilation: approx. €21,000 SURCHARGE
Air-water heat pump with separate controlled residential ventilation: approx. €28,000 SURCHARGE

Ok thanks.
That’s really something, €21,000 surcharge for the integrated controlled residential ventilation. I’d really like to have that explained to me. As a layperson, I can’t understand why a more expensive air-water heat pump has to be used with separate controlled residential ventilation, I don’t have anything like that.

I don’t know if I could just provide pipes for that either.

You can only find that out yourself with the company you commission.
I also don’t know if you are allowed to enter the construction site, I could have worked for weeks, no one would have noticed and it was agreed anyway. Apparently some contracts exclude that. Maybe something can be negotiated so that you can, for example, retrofit something like the Zehnder if it does not interfere with the construction work. That also depends on your construction method and where the respective pipes would have to be laid.
But before doing nothing at all, I would at least consider decentralized ventilation.
I would go there right on Monday and clarify personally so that they can offer you as a customer a mutually acceptable solution to install your desired controlled residential ventilation.
Just ask about the possibility/price for a Zehnder Comfoair Q350 completely independent of the other technology.

Of course, we can keep the heat pump without a ventilation system. We only requested a ventilation system and received the corresponding offer due to feedback from the forum. And regarding the installation date: the funding approval came quite unexpectedly (the application was in March 2024). Both the developer and we were expecting a later date. Therefore, we haven't been in a hurry to make a decision so far.

When you suddenly wrote about the installation date being in five weeks, I initially felt mocked that you only asked us so late and were still calmly discussing matters with us that, for an orderly production process, require what feels like an eternity of lead time (including fixation with a “Plop, that means stop” change freeze). And I also can’t imagine that a not-your-developer-on-your-property would throw the schedules of several other customers overboard and put his team in a time machine to have already produced your walls and ceilings on the loading pallets in the past. In the reality I know, something like that doesn’t work. Heat pumps alone are allocated (by the central committee or Eurotransplant – which gods know who is responsible there?) depending on when a gracious installer has time for them. And now I’m supposed to believe you whistle “money is already there” and the low loader drivers immediately couple up? I still haven’t read my follow-up question answered about who/what/when/how caused the now significantly more expensive system configuration to be a) “without alternative,” as Ms. Former Chancellor would so nicely put it, but b) simultaneously simply dispensable, while c) it can’t be installed with a bypass for parts deliverable only later, which you d) only might put into operation maybe sometime later. You’re allowed to completely strike that stuff off the order list but deny building in an interface for a customer-side order, you say. So far, you genuinely appeared to me like a builder whose wife has a bay window wish, but now I feel more pranked by a troll. Before I loosen “ransom” in the form of further advice here, I am inclined first to ask for a sign of life that you’re even real (back in the day, one might have ended this here with an appropriate punctuation emoticon).

Ok thanks. That’s really amazing, a €21,000 surcharge for the integrated controlled residential ventilation system. I would really like to have that explained to me. Why a more expensive air-to-water heat pump has to be installed with a separate controlled residential ventilation system, I as a layman can’t understand that, I don’t have anything like that. You can only find out for yourself with the company you hired. I also don’t know if you are allowed to enter the construction site, I could have worked for weeks, no one would have noticed and it was agreed anyway. Apparently, some contracts exclude that. Maybe something can be negotiated so that you could retrofit something like the Zehnder, if it doesn’t interfere with the construction work. That also depends on your construction method and where the respective pipes would have to be located. But before doing nothing at all, I would at least consider a decentralized ventilation system. I would go there on Monday and discuss it personally so that they offer you as a customer a mutually acceptable solution to install your desired controlled residential ventilation system. Just ask about the possibility/price for a Zehnder Comfoair Q350 completely independent of other technology.

I had the ducts installed (done without additional costs) and ordered the Q350. Unfortunately, I can’t send you a private message, but I would be very interested in how you implemented it and how satisfied you are with it. I planned the device in the attic and with ComfoTube 90 pipes to each room, for example, in the bedroom/bathroom upstairs 2 valves and the living area 3 supply air and 2 exhaust air. I come to about 100m of pipe.

Unfortunately, I can't send you a private message, but I would be very interested to know how you implemented it and how satisfied you are with it.

Just briefly post your contact here and delete it again within minutes here: