Solid wood parquet flooring with underfloor heating and dry floor construction system?

Hello,
we would like to install a solid wood parquet or plank floor on a large scale with underfloor heating and a support construction in a new low-energy single-family house and are looking for experiences, advantages, but above all disadvantages.

According to our own research, there are several different approaches, such as

- Litotherm with lava split stones in which plastic pipes are laid (14mm)
Thermal conductivity 0.89 W/mK
Impact sound improvement apparently 24-25dB
(according to one source - unfortunately I am not allowed to post the link here...)

- Quick-Tec Greenline: plastic pipes on aluminum plates on wood fiber board
Minimum thermal resistance ≥ 1.25 m2K/W
DIN1264: floors on ground floors (as in our case)
no information on impact sound

- Thermisto (similar to Quick-Tec) with wooden planks <= 22mm
Minimum thermal resistance 0.75 m2K/W
Impact sound improvement value 21 dB

- Janssen underfloor heating with copper pipes and copper plates in support construction
no information on impact sound
no information on minimum thermal resistance

Reasons for the desire for a dry floor construction:
- no adhesive
- elastic step (is this given with Lithotherm, Quick-Tec, Thermisto?)

I would be very interested in experiences as well as advantages and disadvantages of the systems and look forward to comments on this.

Attached are some construction pictures: Screwed solid wood planks (oak) with underfloor heating without screed

There is some information about this in the thread

I wanted to recommend to you earlier, who had also given me good information; thanks again for that, because I only had "outdated" approaches on the matter. In the mentioned thread about solid wood planks, you can read the most important information. There are various options available, all of which can be found on the first search pages on the internet. From there, it is "only" a question of personal preference.

Floors on ground floors (as in our case) no information about impact sound insulation

Why is impact sound insulation on the ground floor so important? Of course, a solid wood plank echoes more than parquet glued onto screed, but that's not a disadvantage. You will find plenty of pros and cons for any system online. Ultimately, it is a question of your own philosophy. As the mainstream (not in a negative sense), I would consider underfloor heating with screed and glued products. Anything you do differently will attract critics. But you can see everywhere that it works if you search for it. I find screwed planks great. A friend has glued parquet, which feels too hard for me, almost like concrete/stone. At the moment, we have large-area floating parquet laid on screed/impact sound insulation. Sometimes there is some creaking in one spot but not really much. From that perspective, I find this type of installation acceptable. However, we definitely wanted a solid wood plank and screwed because I had it for 30 years and I thought it was great. We are implementing it without underfloor heating, but it works just as well with underfloor heating. Some screw the joist layer to the floor and insulate in between; elsewhere, the insulation is laid quasi-floating and system woods like Steico are placed between, into which the plank is then screwed. I like this method best so far. But there are other systems from WEM, Ripal, etc., but ultimately all similar.

Impact sound insulation primarily depends on the type and structure of your subconstruction. You can provide all systems with additional insulation +filling, then the rest is just a matter of preference. An alternative to the Jansen system is Ripal. With both (Jansen and Ripal), one must be aware that in tiled areas a different structure is required. We installed the Cosmo (basically like your Quicktherm). With it, you can also lay tiles in the same system using load distribution plates.

I would definitely also look at the cross-sections of the pipes, as your heating engineer cannot just lay a smaller distance due to the specified pipe spacing.

Thank you very much for the reference to the [ddm Thread], just read it, it speaks to me, and I will ask further questions there if any arise.
Best regards